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  • order of operations for environment variables

    - by alyda
    I want to understand how environment variables are set and reset (overridden). I'm running Apache/2.2.24 (Unix) PHP/5.4.14 on a mac . My theory is this: Environment vars can be set in bash, then they can be overwritten with httpd.conf preceding a VirtualHost directive that precedes php.ini, which can then be overwritten by .htaccess (if allowable) and finally by PHP I tried the following: setting environment variable in bash: I added export ENVIRONMENT='local' to my ~/.bashrc file, restarted apache and did not get any output from print_r($_ENV); (in a simple index.php file at the root of my webserver). I also tried putting ENVIRONMENT='local' into /etc/environment, and restarting apache, nothing, as well as /etc/bashrc, restart apache. still nothing. setting environment variable in httpd.conf: I added SetEnv ENVIRONMENT 'local-httpd to the end of my /etc/apache2/httpd.conf file (but before I load other conf files, such as virtual host [Include /private/etc/apache2/other/*.conf]). I now see the variable in the array print_r($_SERVER); but not print_r($_ENV);. setting environment variable in httpd-vhosts.conf: I added SetEnv ENVIRONMENT 'local-vhost to my /etc/apache2/extra/httpd-vhosts.conf file in my generic directive that points to my default document root. I now see the variable has been overwritten (to local-vhost from local-httpd, so I know where the variable is getting set). setting environment variable in php.ini: while searching for a proper place to put my environment variable, I noticed that variables_order = "GPCS" was set to the production value rather than EGPCS. I changed it, restarted my server and found that I was now getting output for print_r($_ENV); but not my expected custom variable. It also appears that I am not able to set a custom variable in this file. Please tell me if I am wrong setting environment variable in .htaccess: I added SetEnv ENVIRONMENT 'local-htaccess'. This worked as expected, overwriting all other values that were set. setting / overwriting environment variable in PHP: if (...) { putenv('ENVIRONMENT=local'); } I'm asking this question because I have a lot of local and remote testing servers, some of which may or may not allow me access to modify httpd, httpd-vhost, php.ini or environment variables. I want to understand what is best for those difference scenarios (shared hosting, heroku, local servers, etc) I obviously don't know how to properly set the environment variable in bash in a way that php can use it, I'd like to know how to do that (as I think Heroku does something similar with heroku config set...)

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  • Is there an excuse for excessively short variable names?

    - by KChaloux
    This has become a large frustration with the codebase I'm currently working in; many of our variable names are short and undescriptive. I'm the only developer left on the project, and there isn't documentation as to what most of them do, so I have to spend extra time tracking down what they represent. For example, I was reading over some code that updates the definition of an optical surface. The variables set at the start were as follows: double dR, dCV, dK, dDin, dDout, dRin, dRout dR = Convert.ToDouble(_tblAsphere.Rows[0].ItemArray.GetValue(1)); dCV = convert.ToDouble(_tblAsphere.Rows[1].ItemArray.GetValue(1)); ... and so on Maybe it's just me, but it told me essentially nothing about what they represented, which made understanding the code further down difficult. All I knew was that it was a variable parsed out specific row from a specific table, somewhere. After some searching, I found out what they meant: dR = radius dCV = curvature dK = conic constant dDin = inner aperture dDout = outer aperture dRin = inner radius dRout = outer radius I renamed them to essentially what I have up there. It lengthens some lines, but I feel like that's a fair trade off. This kind of naming scheme is used throughout a lot of the code however. I'm not sure if it's an artifact from developers who learned by working with older systems, or if there's a deeper reason behind it. Is there a good reason to name variables this way, or am I justified in updating them to more descriptive names as I come across them?

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  • How do I go about overloading C++ operators to allow for chaining?

    - by fneep
    I, like so many programmers before me, am tearing my hair out writing the right-of-passage-matrix-class-in-C++. I have never done very serious operator overloading and this is causing issues. Essentially, by stepping through This is what I call to cause the problems. cMatrix Kev = CT::cMatrix::GetUnitMatrix(4, true); Kev *= 4.0f; cMatrix Baz = Kev; Kev = Kev+Baz; //HERE! What seems to be happening according to the debugger is that Kev and Baz are added but then the value is lost and when it comes to reassigning to Kev, the memory is just its default dodgy values. How do I overload my operators to allow for this statement? My (stripped down) code is below. //header class cMatrix { private: float* _internal; UInt32 _r; UInt32 _c; bool _zeroindexed; //fast, assumes zero index, no safety checks float cMatrix::_getelement(UInt32 r, UInt32 c) { return _internal[(r*this->_c)+c]; } void cMatrix::_setelement(UInt32 r, UInt32 c, float Value) { _internal[(r*this->_c)+c] = Value; } public: cMatrix(UInt32 r, UInt32 c, bool IsZeroIndexed); cMatrix( cMatrix& m); ~cMatrix(void); //operators cMatrix& operator + (cMatrix m); cMatrix& operator += (cMatrix m); cMatrix& operator = (const cMatrix &m); }; //stripped source file cMatrix::cMatrix(cMatrix& m) { _r = m._r; _c = m._c; _zeroindexed = m._zeroindexed; _internal = new float[_r*_c]; UInt32 size = GetElementCount(); for (UInt32 i = 0; i < size; i++) { _internal[i] = m._internal[i]; } } cMatrix::~cMatrix(void) { delete[] _internal; } cMatrix& cMatrix::operator+(cMatrix m) { return cMatrix(*this) += m; } cMatrix& cMatrix::operator*(float f) { return cMatrix(*this) *= f; } cMatrix& cMatrix::operator*=(float f) { UInt32 size = GetElementCount(); for (UInt32 i = 0; i < size; i++) { _internal[i] *= f; } return *this; } cMatrix& cMatrix::operator+=(cMatrix m) { if (_c != m._c || _r != m._r) { throw new cCTException("Cannot add two matrix classes of different sizes."); } if (!(_zeroindexed && m._zeroindexed)) { throw new cCTException("Zero-Indexed mismatch."); } for (UInt32 row = 0; row < _r; row++) { for (UInt32 column = 0; column < _c; column++) { float Current = _getelement(row, column) + m._getelement(row, column); _setelement(row, column, Current); } } return *this; } cMatrix& cMatrix::operator=(const cMatrix &m) { if (this != &m) { _r = m._r; _c = m._c; _zeroindexed = m._zeroindexed; delete[] _internal; _internal = new float[_r*_c]; UInt32 size = GetElementCount(); for (UInt32 i = 0; i < size; i++) { _internal[i] = m._internal[i]; } } return *this; }

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  • How can I modify my Shunting-Yard Algorithm so it accepts unary operators?

    - by KingNestor
    I've been working on implementing the Shunting-Yard Algorithm in JavaScript for class. Here is my work so far: var userInput = prompt("Enter in a mathematical expression:"); var postFix = InfixToPostfix(userInput); var result = EvaluateExpression(postFix); document.write("Infix: " + userInput + "<br/>"); document.write("Postfix (RPN): " + postFix + "<br/>"); document.write("Result: " + result + "<br/>"); function EvaluateExpression(expression) { var tokens = expression.split(/([0-9]+|[*+-\/()])/); var evalStack = []; while (tokens.length != 0) { var currentToken = tokens.shift(); if (isNumber(currentToken)) { evalStack.push(currentToken); } else if (isOperator(currentToken)) { var operand1 = evalStack.pop(); var operand2 = evalStack.pop(); var result = PerformOperation(parseInt(operand1), parseInt(operand2), currentToken); evalStack.push(result); } } return evalStack.pop(); } function PerformOperation(operand1, operand2, operator) { switch(operator) { case '+': return operand1 + operand2; case '-': return operand1 - operand2; case '*': return operand1 * operand2; case '/': return operand1 / operand2; default: return; } } function InfixToPostfix(expression) { var tokens = expression.split(/([0-9]+|[*+-\/()])/); var outputQueue = []; var operatorStack = []; while (tokens.length != 0) { var currentToken = tokens.shift(); if (isNumber(currentToken)) { outputQueue.push(currentToken); } else if (isOperator(currentToken)) { while ((getAssociativity(currentToken) == 'left' && getPrecedence(currentToken) <= getPrecedence(operatorStack[operatorStack.length-1])) || (getAssociativity(currentToken) == 'right' && getPrecedence(currentToken) < getPrecedence(operatorStack[operatorStack.length-1]))) { outputQueue.push(operatorStack.pop()) } operatorStack.push(currentToken); } else if (currentToken == '(') { operatorStack.push(currentToken); } else if (currentToken == ')') { while (operatorStack[operatorStack.length-1] != '(') { if (operatorStack.length == 0) throw("Parenthesis balancing error! Shame on you!"); outputQueue.push(operatorStack.pop()); } operatorStack.pop(); } } while (operatorStack.length != 0) { if (!operatorStack[operatorStack.length-1].match(/([()])/)) outputQueue.push(operatorStack.pop()); else throw("Parenthesis balancing error! Shame on you!"); } return outputQueue.join(" "); } function isOperator(token) { if (!token.match(/([*+-\/])/)) return false; else return true; } function isNumber(token) { if (!token.match(/([0-9]+)/)) return false; else return true; } function getPrecedence(token) { switch (token) { case '^': return 9; case '*': case '/': case '%': return 8; case '+': case '-': return 6; default: return -1; } } function getAssociativity(token) { switch(token) { case '+': case '-': case '*': case '/': return 'left'; case '^': return 'right'; } } It works fine so far. If I give it: ((5+3) * 8) It will output: Infix: ((5+3) * 8) Postfix (RPN): 5 3 + 8 * Result: 64 However, I'm struggling with implementing the unary operators so I could do something like: ((-5+3) * 8) What would be the best way to implement unary operators (negation, etc)? Also, does anyone have any suggestions for handling floating point numbers as well? One last thing, if anyone sees me doing anything weird in JavaScript let me know. This is my first JavaScript program and I'm not used to it yet.

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  • Ever any performance different between Java >> and >>> right shift operators?

    - by Sean Owen
    Is there ever reason to think the (signed) and (unsigned) right bit-shift operators in Java would perform differently? I can't detect any difference on my machine. This is purely an academic question; it's never going to be the bottleneck I'm sure. I know: it's best to write what you mean foremost; use for division by 2, for example. I assume it comes down to which architectures have which operations implemented as an instruction.

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  • How do languages handle side effects of compound operators?

    - by Kos
    Hello, Assume such situation: int a = (--t)*(t-2); int b = (t/=a)+t; In C and C++ this is undefined behaviour, as described here: Undefined Behavior and Sequence Points However, how does this situation look in: JavaScript, Java, PHP... C# well, any other language which has compound operators? I'm bugfixing a Javascript - C++ port right now in which this got unnoticed in many places. I'd like to know how other languages generally handle this... Leaving the order undefined is somehow specific to C and C++, isn't it?

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  • Can I customize the indentation of ternary operators in emacs' cperl-mode?

    - by Ryan Thompson
    In emacs cperl-mode, ternary operators are not treated specially. If you break them over multiple lines, cperl-mode simply indents each line the same way it indents any continued statement, like this: $result = ($foo == $bar) ? 'result1' : ($foo == $baz) ? 'result2' : ($foo == $qux) ? 'result3' : ($foo == $quux) ? 'result4' : fail_result; This is not very readable. Is there some way that I can convince cperl-mode indent like this? $result = ($foo == $bar) ? 'result1' : ($foo == $baz) ? 'result2' : ($foo == $qux) ? 'result3' : ($foo == $quux) ? 'result4' : fail_result; By the way, code example from this question.

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  • How can I set a Windows user environment variable that takes effect for the current session?

    - by Graham Powell
    I am trying to set a Windows user environment variable and then launch an application via either batch file or a script. However, the environment variable is not set to the appropriate value until after the user logs off and logs back on. (I think a more accurate description would be that the new value is not available to the app until after the next logon.) Is there any way to set a variable in the user's environment so that it's immediately available? I'm doing this because this program's functionality can be controlled by environment variables, and users will need different functionality at different times. Because of license constraints I need to set this dynamically, if possible. Thanks, Graham

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  • C/C++: Who uses the logical operator macros from iso646.h and why?

    - by Jaime Soto
    There has been some debate at work about using the merits of using the alternative spellings for C/C++ logical operators in iso646.h: and && and_eq &= bitand & bitor | compl ~ not ! not_eq != or || or_eq |= xor ^ xor_eq ^= According to Wikipedia, these macros facilitate typing logical operators in international (non-US English?) and non-QWERTY keyboards. All of our development team is in the same office in Orlando, FL, USA and from what I have seen we all use the US English QWERTY keyboard layout; even Dvorak provides all the necessary characters. Supporters of using the iso646.h macros claim we should them because they are part of the C and C++ standards. I think this argument is moot since digraphs and trigraphs are also part of these standards and they are not even supported by default in many compilers. My rationale for opposing these macros in our team is that we do not need them since: Everybody on our team uses the US English QWERTY keyboard layout; C and C++ programming books from the US barely mention iso646.h, if at all; and new developers may not be familiar with iso646.h (this is expected if they are from the US). /rant Finally, to my set of questions: Does anyone in this site use the iso646.h logical operator macros? Why? What is your opinion about using the iso646.h logical operator macros in code written and maintained on US English QWERTY keyboards? Is my digraph and trigraph analogy a valid argument against using iso646.h with US English QWERTY keyboard layouts? EDIT: I missed two similar questions in StackOverflow: Is anybody using the named boolean operators? Which C++ logical operators do you use: and, or, not and the ilk or C style operators? why?

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  • How to configure sudoers to always keep LD_LIBRARY_PATH envrionment variable?

    - by Yanick Girouard
    No matter what I try, it seems that the LD_LIBRARY_PATH environment variable is not kept after I run a command with sudo. The only way I managed to have it stick, is to prefix my sudo command with LD_LIBRARY_PATH=/the/path whenever I call it from the command-line, but I would like to not have to do this every time. It seems the env_keep option ignores this variable, and so does the exempt_group option. My %group currently has ALL=(ALL) NOPASSWD:ALL as its access in sudoers. I would like this specific environment variable to be kept for any command I run. How can I do this? My server is running Red Hat Enterprise Linux 5.7.

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  • Prolog - How do you distinguish between just a string, and a variable? [closed]

    - by Mr Prolog
    When you are querying a Prolog database, often you will use terms that start with an uppercase letter as your variables. However, let's say that one of the constraints on your query is that a person's location must be "Dallas", and you want to query all the information in the database who meet those specifications. How would do you correctly make sure that Dallas is not interpreted as a variable to store a value in, and is interpreted as a string instead, for usage as a constraint on the query?

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  • How to send keypresses from qt application to libvlc

    - by anon
    I need to send keypresses from my application window to libvlc, how do i do that? I tried using varSetInteger but then i got the following error error: ‘var_SetInteger’ was not declared in this scope so i searched for the file in which var_SetInteger was defined and found that it was defined in vlc_variables.h so in included it and got the following error. What am i missing? ../vlc-0.9.10/include/vlc_variables.h:121: error: ‘__var_Create’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:121: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:121: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:121: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:121: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:122: error: ‘__var_Destroy’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:122: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:122: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:122: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:122: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:124: error: ‘__var_Change’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:124: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:124: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:124: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:124: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:126: error: ‘__var_Type’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:126: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:126: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:126: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:126: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:127: error: ‘__var_Set’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:127: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:127: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:127: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:127: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:128: error: ‘__var_Get’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:128: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:128: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:128: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:128: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:131: error: ‘__var_Command’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:131: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:131: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:131: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:131: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:133: error: expected constructor, destructor, or type conversion before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:171: error: ‘__var_AddCallback’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:171: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:171: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:171: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:171: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:172: error: ‘__var_DelCallback’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:172: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:172: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:172: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:172: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:173: error: ‘__var_TriggerCallback’ has not been declared ../vlc-0.9.10/include/vlc_variables.h:173: error: expected identifier before ‘(’ token ../vlc-0.9.10/include/vlc_variables.h:173: error: expected )' before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:173: error: expected ‘,’ or ‘...’ before ‘*’ token ../vlc-0.9.10/include/vlc_variables.h:173: error: expected constructor, destructor, or type conversion before ‘)’ token ../vlc-0.9.10/include/vlc_variables.h:201: error: ‘__var_SetInteger’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:201: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:201: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:201: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:201: error: expected primary-expression before ‘int’ ../vlc-0.9.10/include/vlc_variables.h:201: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:202: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:215: error: ‘__var_SetBool’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:215: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:215: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:215: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:215: error: expected primary-expression before ‘bool’ ../vlc-0.9.10/include/vlc_variables.h:215: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:216: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:229: error: ‘__var_SetTime’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:229: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:229: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:229: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:229: error: expected primary-expression before ‘i’ ../vlc-0.9.10/include/vlc_variables.h:229: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:230: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:243: error: ‘__var_SetFloat’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:243: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:243: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:243: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:243: error: expected primary-expression before ‘float’ ../vlc-0.9.10/include/vlc_variables.h:243: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:244: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:257: error: ‘__var_SetString’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:257: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:257: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:257: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:257: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:257: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:258: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:270: error: ‘__var_SetVoid’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:270: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:270: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:270: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:270: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:271: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:302: error: ‘__var_GetInteger’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:302: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:302: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:302: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:302: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:303: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:317: error: ‘__var_GetBool’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:317: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:317: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:317: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:317: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:318: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:332: error: ‘__var_GetTime’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:332: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:332: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:332: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:332: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:333: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:347: error: ‘__var_GetFloat’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:347: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:347: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:347: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:347: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:348: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:362: error: ‘__var_GetString’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:362: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:362: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:362: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:362: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:363: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:371: error: ‘__var_GetNonEmptyString’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:371: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:371: error: ‘obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:371: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:371: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:372: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:412: error: variable or field ‘__var_IncInteger’ declared void ../vlc-0.9.10/include/vlc_variables.h:412: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:412: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:412: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:424: error: variable or field ‘__var_DecInteger’ declared void ../vlc-0.9.10/include/vlc_variables.h:424: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:424: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:424: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:437: error: ‘__var_CreateGetInteger’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:437: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:437: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:437: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:437: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:438: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:449: error: ‘__var_CreateGetBool’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:449: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:449: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:449: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:449: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:450: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:461: error: ‘__var_CreateGetTime’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:461: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:461: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:461: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:461: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:462: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:473: error: ‘__var_CreateGetFloat’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:473: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:473: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:473: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:473: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:474: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:485: error: ‘__var_CreateGetString’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:485: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:485: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:486: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:486: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:487: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:492: error: ‘__var_CreateGetNonEmptyString’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:492: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:492: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:493: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:493: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:494: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:527: error: ‘__var_CreateGetIntegerCommand’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:527: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:527: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:527: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:527: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:528: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:540: error: ‘__var_CreateGetBoolCommand’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:540: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:540: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:540: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:540: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:541: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:553: error: ‘__var_CreateGetTimeCommand’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:553: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:553: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:553: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:553: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:554: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:566: error: ‘__var_CreateGetFloatCommand’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:566: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:566: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:566: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:566: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:567: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:579: error: ‘__var_CreateGetStringCommand’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:579: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:579: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:580: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:580: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:581: error: expected ‘,’ or ‘;’ before ‘{’ token ../vlc-0.9.10/include/vlc_variables.h:587: error: ‘__var_CreateGetNonEmptyStringCommand’ declared as an ‘inline’ variable ../vlc-0.9.10/include/vlc_variables.h:587: error: ‘vlc_object_t’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:587: error: ‘p_obj’ was not declared in this scope ../vlc-0.9.10/include/vlc_variables.h:588: error: expected primary-expression before ‘const’ ../vlc-0.9.10/include/vlc_variables.h:588: error: initializer expression list treated as compound expression ../vlc-0.9.10/include/vlc_variables.h:589: error: expected ‘,’ or ‘;’ before ‘{’ token src/transcribeWidget.cpp:859: warning: unused parameter ‘bytesSent’ src/transcribeWidget.cpp:859: warning: unused parameter ‘bytesTotal’ ../vlc-0.9.10/include/vlc_variables.h:201: warning: ‘__var_SetInteger’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:215: warning: ‘__var_SetBool’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:229: warning: ‘__var_SetTime’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:243: warning: ‘__var_SetFloat’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:257: warning: ‘__var_SetString’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:270: warning: ‘__var_SetVoid’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:302: warning: ‘__var_GetInteger’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:317: warning: ‘__var_GetBool’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:332: warning: ‘__var_GetTime’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:347: warning: ‘__var_GetFloat’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:362: warning: ‘__var_GetString’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:371: warning: ‘__var_GetNonEmptyString’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:437: warning: ‘__var_CreateGetInteger’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:449: warning: ‘__var_CreateGetBool’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:461: warning: ‘__var_CreateGetTime’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:473: warning: ‘__var_CreateGetFloat’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:485: warning: ‘__var_CreateGetString’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:492: warning: ‘__var_CreateGetNonEmptyString’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:527: warning: ‘__var_CreateGetIntegerCommand’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:540: warning: ‘__var_CreateGetBoolCommand’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:553: warning: ‘__var_CreateGetTimeCommand’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:566: warning: ‘__var_CreateGetFloatCommand’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:579: warning: ‘__var_CreateGetStringCommand’ defined but not used ../vlc-0.9.10/include/vlc_variables.h:587: warning: ‘__var_CreateGetNonEmptyStringCommand’ defined but not used

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  • How to read STDIN into string variable until EOF in C?

    - by NovumCoder
    Hi, im getting "Bus Error" trying to read stdin into a char* variable. I just want to read whole stuff coming over stdin and put it first into a variable, then continue working on the variable. My Code is as follows: char* content; char* c; while( scanf( "%c", c)) { strcat( content, c); } fprintf( stdout, "Size: %d", strlen( content)); But somehow i always get "Bus error" returned by calling "cat test.txt | myapp", where "myapp" is the compiled code above. My question is how do i read stdin until EOF into a variable? As you see in the code, i just want to print the size of input coming over stdin, in this case it should be equal to the size of the file "test.txt". I thought just using scanf would be enough, maybe buffered way to read stdin?

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  • How to make an IDisposable object a class variable?

    - by Ben Aston
    I am working with Active Directory using C#. Instantiating the PrincipalContext object seems to be expensive, so I'd like to store one in a class variable. When using PrincipalContext as a local variable, I can use the convenient using syntax. When storing an IDisposable object in a static variable, how do I ensure the object is properly disposed of?

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  • Environment variable names with parentheses, like %ProgramFiles(x86)%, in PowerShell?

    - by jwfearn
    How does one get the value of environment variable whose name contains parentheses in a PowerShell script? To complicate matters, some variables names contains parentheses while others have similar names without parenteses. For example (using cmd.exe): C:\>set | find "ProgramFiles" CommonProgramFiles=C:\Program Files\Common Files CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files ProgramFiles=C:\Program Files ProgramFiles(x86)=C:\Program Files (x86) We see that %ProgramFiles% is not the same as %ProgramFiles(x86)%. My PowerShell code is failing in a weird way because it's ignoring the part of the environment variable name after the parentheses. Since this happens to match the name of a different, but existing, environment variable I don't fail, I just get the right value of the wrong variable. Here's a test function in the PowerShell scripting language to illustrate my problem: function Do-Test { $ok = "C:\Program Files (x86)" # note space between 's' and '( $bad = "$Env:ProgramFiles" + "(x86)" # uses %ProgramFiles% $bin32 = "$Env:ProgramFiles(x86)" # LINE 6, I want to use %ProgramFiles(x86)% if ( $bin32 -eq $ok ) { Write-Output "Pass" } elseif ( $bin32 -eq $bad ) { Write-Output "Fail: %ProgramFiles% used instead of %ProgramFiles(x86)%" } else { Write-Output "Fail: some other reason" } } And here's the output: PS> Do-Test Fail: %ProgramFiles% used instead of %ProgramFiles(x86)% Is there a simple change I can make to line 6 above to get the correct value of %ProgramFiles(x86)%? *NOTE: In the text of this post I am using batch file syntax for environment variables as a convenient shorthand. For example %SOME_VARIABLE% means "the value of the environment variable whose name is SOME_VARIABLE". If I knew the properly escaped syntax in PowerShell, I wouldn't need to ask this question.*

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  • How can I trace a variable at runtime in C#?

    - by luvieere
    How can I track a variable's values as they change, at runtime, in C#? I'm interested in the same functionality that the debugger provides when I'm tracing a variable through execution steps, only that I need to call upon it from my code. Some sort of key-value observing, but for all kinds of variables(local, class, static, etc), not only properties. So, basically, receive a notification when a variable's value changes.

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  • How can I give a variable to an action listener?

    - by Roman
    I have a static variable partner in the class. And I want to set a value of these variable whenever a radio button is pressed. This is the code I tried to use: for (String playerName: players) { option = new JRadioButton(playerName, false); option.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent evt) { partner = playerName; } }); partnerSelectionPanel.add(option); group.add(option); } The problem here is that the actionPerformed does not see the variable playerName created in the loop. How can I pass this variable to the actionListener?

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  • Sending the variable's content to my mailbox in Python?

    - by brilliant
    I have asked this question here about a Python command that fetches a URL of a web page and stores it in a variable. The first thing that I wanted to know then was whether or not the variable in this code contains the HTML code of a web-page: from google.appengine.api import urlfetch url = "http://www.google.com/" result = urlfetch.fetch(url) if result.status_code == 200: doSomethingWithResult(result.content) The answer that I received was "yes", i.e. the variable "result" in the code did contain the HTML code of a web page, and the programmer who was answering said that I needed to "check the Content-Type header and verify that it's either text/html or application/xhtml+xml". I've looked through several Python tutorials, but couldn't find anything about headers. So my question is where is this Content-Type header located and how can I check it? Could I send the content of that variable directly to my mailbox? Here is where I got this code. It's on Google App Engines.

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  • Python: How do I pass a variable by reference?

    - by David Sykes
    The Python documentation seems unclear about whether parameters are passed by reference or value, and the following code produces the unchanged value 'Original' class PassByReference: def __init__(self): self.variable = 'Original' self.Change(self.variable) print self.variable def Change(self, var): var = 'Changed' Is there something I can do to pass the variable by actual reference? Update: I am coming to the conclusion that while Andrea answered my actual question (Can you... No but you can...), on the subject of pass by reference Blair Conrad is more technically correct. As I understand it the crux is that a copy of a reference is being passed. If you assign that copy, as in my example, then you lose the reference to the original and it remains unchanged. If, however, you 'use' that reference, for example append on a passed list, then the original is changed. I will see how the comments and votes go before choosing the answer people think is the best

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  • Why would Visual Studio 2010 say it can't show a variable during debug?

    - by Edward Tanguay
    In Visual Studio 2010 sometimes when I want to get the value of a variable while debugging, it tells me that it "does not exist in this context" when it obviously does. I have found that if I use the variable, as in the screenshot below, then it is able to show it. Has anyone experienced this? Visual Studio 2008 never did this. How can I get Visual Studio 2010 to always show me variable values while debugging?

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  • how to store a value returned from a sql query in a variable in batch programming ?

    - by Arunachalam
    how to store a value returned from a sql query in a variable in batch programming ? i can invoke sqlserver queries from my cmd prompt using sqlcmd server name then the qwery this is query statement i m going to use SELECT CASE WHEN DATEDIFF(minute, record_timestamp, GETDATE()) < 10 THEN 1 ELSE 0 END how to store the value returned i tried using set variablename but it save the statement rather than the return value .. and if i save this in a variable what type of variable it will can i compare it with numeric values in if condition

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  • Passing a outside variable into a <asp:sqldatasource> tag. ASP.NET 2.0

    - by MadMAxJr
    I'm designing some VB based ASP.NET 2.0, and I am trying to make more use of the various ASP tags that visual studio provides, rather than hand writing everything in the code-behind. I want to pass in an outside variable from the Session to identify who the user is for the query. <asp:sqldatasource id="DataStores" runat="server" connectionstring="<%$ ConnectionStrings:MY_CONNECTION %>" providername="<%$ ConnectionStrings:MY_CONNECTION.ProviderName %>" selectcommand="SELECT THING1, THING2 FROM DATA_TABLE WHERE (THING2 IN (SELECT THING2 FROM RELATED_DATA_TABLE WHERE (USERNAME = @user)))" onselecting="Data_Stores_Selecting"> <SelectParameters> <asp:parameter name="user" defaultvalue ="" /> </SelectParameters> </asp:sqldatasource> And on my code behind I have: Protected Sub Data_Stores_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles Data_Stores.Selecting e.Command.Parameters("user").Value = Session("userid") End Sub Oracle squaks at me with ORA-01036, illegal variable name. Am I declaring the variable wrong in the query? I thought external variables share the same name with a @ prefixed. from what I understand, this should be placing the value I want into the query when it executes the select. EDIT: Okay, thanks for the advice so far, first error was corrected, I need to use : and not @ for the variable declaration in the query. Now it generates an ORA-01745 invalid host/bind variable name. EDIT AGAIN: Okay, looks like user was a reserved word. It works now! Thanks for other points of view on this one. I hadn't thought of that approach.

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  • Using SSIS, how do you read a datetime field into a variable that is of Data Type string?

    - by Mark Kadlec
    This one has bugged me for the longest time and a great question to ask the Stackoverflow users I think. I have a rather large SSIS flow that uses a string variable to store the datetime. I would now like to dynamically read the datetime value from the database, but how would you construct the SSIS to do this? My first obvious thought would be to simply execute a SQL task to get the datetime and store it in the variable, but got the "differs from the current variable type" error. Is there a simple way to convert the database datetime into a String variable? Any help from the community would be appreciated,

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