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  • Function pointer demo

    - by AKN
    Hi, Check the below code void functionptrdemo() { typedef int *(funcPtr) (int,int); funcPtr ptr; ptr = add; //IS THIS CORRECT? (*ptr)(2,3); } In the place where I try to assign a function to function ptr with same function signature, it shows a compilation error as error C2659: '=' : function as left operand

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  • Javascript new object (function ) vs inline invocation

    - by Sheldon Ross
    Is there any considerations to determine which is better practice for creating an object with private members? var object = new function () { var private = "private variable"; return { method : function () { ..dosomething with private; } } } VS var object = function () { ... }(); Basically what is the difference between using NEW here, and just invoking the function immediately after we define it?

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  • custom php function creation and install

    - by Ben Olley
    I would like to know how to create a php function that can be installed in php just like the already built in functions like : rename copy The main point I would like to achieve is a simple php function that can be called from ANY php page on the whole host without needing to have a php function within the php page / needing an include. so simply I would like to create a function that will work like this : location(); That without a given input string will output the current location of the file via echo etc

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  • creating a JQuery function

    - by Russell Parrott
    Sorry to bother you guys & girls again on Christmas eve, but I need help creating a reusable JQuery function. I have "badly crafted" this set of code that all works. But I would really like to put it as a function so I don't have to keep repeating everything for each form. I am not too sure about how all the if statements can be combined etc. that is why I wrote it as it is. Any help much appreciated - Oh I suppose it could also be some kind of plugin but that might be the next step if I can understand how the function works. $(':input:visible').live('blur',function(){ if($(this).attr('required')) { if($(this).val() == '' ) { $(this).css({'background-color':'#FFEEEE' }); $(this).parent('form').children('input[type=submit]').hide(); $(this).next('.errormsg').html('OOPs ... '+$(this).prev('label').html()+' is required'); $(this).focus(); $(this).attr('placeholder').hide(); } else { $(this).css({'background-color':'#FFF' , 'border-color':'#999999'}); $(this).next('.errormsg').empty(); $(this).parent('form').children('input[type=submit]').show(); } } return false; }); $(':input[max]').live('blur',function(){ if($(this).attr('max') < parseInt($(this).val()) ){ $(this).next('.errormsg').html( 'OOPs ... the maximum value is '+$(this).attr('max') ); $(this).parent('form').children('input[type=submit]').hide(); $(this).focus(); } else {} return false; }); $(':input[min]').live('blur',function(){ if($(this).attr('min') > parseInt($(this).val()) ){ $(this).next('.errormsg').html( 'OOPs ... the minimum value is '+$(this).attr('min') ); $(this).parent('form').children('input[type=submit]').hide(); $(this).focus(); } else {} return false; }); $(':input[maxlength]').live('keyup',function(){ if($(this).val()==''){ } else { $(this).next('.errormsg').html( $(this).attr('maxlength')- $(this).val().length +' chars remaining'); } return false; }); As said, help much appreciated with one small (I hope) thing, how can I break out of any function IF there are no error messages to actually submit the form?

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  • Jquery toggle function that doesn't return false?

    - by Tom
    Hi, Is it possible to stop the automatic preventDefault() from applying in a simple Jquery toggle function? $(".mydiv").toggle( function () { $(this).addClass("blue"); }, function () { $(this).removeClass("blue"); } ); The above prevents elements inside the div from responding normally to the click. It doesn't have to be the toggle() function - anything that allows toggling a class on and off AND doesn't return false would be great. Thanks.

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  • what functions are called when passing value to function

    - by Tim
    In C++, if an object of a class is passed as a parameter into a function, the copy constructor of the class will be called. I was wondering if the object is of nonclass type, what function will be called? Similarly in C, what function is called when passing values or address of variables into a function? Thanks and regards!

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  • nested function

    - by user359179
    Hi to all of you, 1.I just came across that ANSI(ISO) aint allow nesting of function.. i want to know what makes gnu c ito implemet this functionality(why such need arise). 2.If a function say(a()) is define with in another function say(b()) then the lifetime of a() would be whole prorgramme? 3.Will the storage for a() ll be created in a stack allocated to function b().?

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  • Passing a filepath to a R function?

    - by Philipp
    Hi everybody, I tried to pass a filepath to a function in R, but I failed =/ I hope someone here can help me. >heat <- function(filepath) { chicks <- read.table(file=filepath, dec=",", header=TRUE, sep="\t") ... } When I call the function, nothing happens... >heat("/home/.../file.txt") ... and "chicks" is not found >chicks Error: Object 'chicks' not found What is the correct way to pass a path to a function? Best wishes from Germany, Phil

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  • callback function for php preg_replace_callback not getting called on linux CentOS 5.4

    - by user105165
    I have used the preg_replace_callback as $string = preg_replace_callback($pattern,'CreateTemplatesController::callbackhandler',$string ); I have called the callbackhandler function with the class name as this function is a private static function. Problem is "callbackhandler" function is not getting called. Please post if any one know the reason for the same. Thanks in Advance

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  • How to pass a function as an argument?

    - by TFerrell
    I'm looking to pass an anonymous function to another function, but it doesn't seem to be working as I'd like. I've attached the code, I think it'd give you a better idea what I'd to do. <script language="javascript" type="text/javascript"> function do_work(success) { success; } do_work(function () { alert("hello") }); </script> Thanks in advance for any help.

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  • Function keys on Dell laptop work double as OEM keys

    - by Factor Mystic
    I'm working with a new Dell Studio 1555, and the F1-F12 keys at the top of the keyboard are dual function with OEM keys such as volume and screen brightness. The problem is, is that the OEM keys are the default, and you have to press the Fn key to get the F- key to work. For example, this means you have to hit Alt+Fn+F4 to close a window, instead of the regular Alt+F4. This is really annoying. Is there a way to reverse the default functions of the F- keys in Windows? Ideally this is possible without some kind of third party hotkey manager.

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  • Excel INDIRECT function and conditional formatting - highlighting a row

    - by Ehryk
    I'm having an issue with conditional formatting using the INDIRECT function. I'm doing something similar to Using INDIRECT and AND/IF for conditional formatting , but the only answer there isn't working for me. Basically, I want to highlight rows where B is not blank and F is blank. INDIRECT will work for ONE of the conditions, but = AND(INDIRECT("B"&ROW()) > 0, INDIRECT("F"&ROW()) = "") does not work at all. The answer in the question points to replacing the references with relative ones, so I'm thinking this should work: = AND ($B2 > 0, $F2 = "") But it does not, nor does ISBLANK($F@) or ISEMPTY($F2) (the cell contains a formula that sometimes will return "", I want the row highlighted in these cases but only when something is in column B). Am I missing something about relative references? Why doesn't INDIRECT work with AND/OR?

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  • Function key taken by another program, how to default it

    - by Milox
    Everytime I press the F11 key it opens up a browser window with the same URL. This happens anywhere I press it and I need this key to have it's default behavior because I use it to program on Visual Studio (Windows 7). Any ideas why this is happening and how to go back to default function keys?, I haven't installed anything that I remember can cause this behavior. This is a standard Dell desktop key board, no multimedia keys, like this one: Firing URL is http://argos:8080/Login.jsp?jsessionid=55rh3obsahm9m seems like one of our company's internal addresses but IT guys say they have no idea about it. I don't see any suspicious software that can be causing this.

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  • Auto create folders using Excel field entries

    - by prrao
    I need to generate folders containing certain Excel field entries: Additionally, I need to append a date to the folder name based on that entry So If I have the above Excel table, I'd need the following set of folders to be generated in the same directory: Is this possible using a macro? Also, in case I add another entry how would I generate another folder only for that entry; for example I add another project CWO-1106: Basically, I'd like to keep updating the Excel sheet and create folders only for the new entries Any help would be appreciated. Thanks!

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  • Bash/shell script - shell output redirection inside a function

    - by Josh
    function grabSourceFile { cd /tmp/lmpsource wget $1 > $LOG baseName=$(basename $1) tar -xvf $baseName > $LOG cd $baseName } When I call this function The captured output is not going to the log file. The output redirection works fine until I call the function. The $LOG variable is set at the top of the file. I tried echoing statements and they would not print. I am guessing the function captures the output itself? If so how do push the output to the file instead of the console. (The wget above prints to console, while an echo inside the function does nothing.)

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  • How do i create a table dynamically with dynamic datatype from a PL/SQL procedure

    - by Swapna
    CREATE OR REPLACE PROCEDURE p_create_dynamic_table IS v_qry_str VARCHAR2 (100); v_data_type VARCHAR2 (30); BEGIN SELECT data_type || '(' || data_length || ')' INTO v_data_type FROM all_tab_columns WHERE table_name = 'TEST1' AND column_name = 'ZIP'; FOR sql_stmt IN (SELECT * FROM test1 WHERE zip IS NOT NULL) LOOP IF v_qry_str IS NOT NULL THEN v_qry_str := v_qry_str || ',' || 'zip_' || sql_stmt.zip || ' ' || v_data_type; ELSE v_qry_str := 'zip_' || sql_stmt.zip || ' ' || v_data_type; END IF; END LOOP; IF v_qry_str IS NOT NULL THEN v_qry_str := 'create table test2 ( ' || v_qry_str || ' )'; END IF; EXECUTE IMMEDIATE v_qry_str; COMMIT; END p_create_dynamic_table; Is there any better way of doing this ?

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  • SqlServer2008 - Can I Alter a Scalar Function while it is referenced in many places

    - by Casey C.
    We have a scalar function that returns a DateTime. It performs a couple of quick table selects to get its return value. This function is already in use throughout the database - in default constraints, stored procs, etc. I would like to change the implementation of the function (to remove the table hits and make it more efficient) but apparently I can't do that while it is referenced by other objects in the database. Will I actually need to update every object in the database that references it to remove the reference, update the function and then update all those objects to restore the reference to the function? Thanks for any insight you can give.

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  • Create and access folder outside Apache Tomcat webapps folder

    - by Padur
    My web application requires functionality where end users can upload content, that can be later downloaded or viewed by others, the problem with current scheme is If I create such folder as part of your web project under webapps, every time I do deploy your web application (*.war), the content of that directory will be lost (or overridden). I think the best way to accomplish that is to create folder outside of standard tomcat webapps and access it from there, not sure how to do. Please point in correct direction. I am using Tomcat 4.x soon will be moving to 6.x. -Padur

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  • Vim: Call an ex command (set) from function?

    - by sixtyfootersdude
    Drawing a blank on this, and google was not helpful. Want to make a function like this: function JakPaste() let tmp = :set paste? if tmp == "paste" set nopaste else set paste endif endfunction map <F2> :call JakPaste()<CR> However this does not work. I have isolated the broken line: function JakPaste() let tmp = set paste? endfunction map <F2> :call JakPaste()<CR> Pressing F2 results in this error: Error detected while processing function JakPaste: line 1: E121: Undefined variable: set E15: Invalid expression: set paste? Hit ENTER or type command to continue How should I call an ex command (set) from a vim function? This seems somewhat relevant however I still don't get it.

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  • How flexible is the 'indirect' function?

    - by Chuck
    My curiosity pushes me to ask this question. If I were to have a series of functions that referenced a different column in a worksheet but all ended on the same row of data is there a way to point the 'row' part of a cell reference to a blank cell and use it has a variable to show the results of the functions up to a desired row simultaneously? Example: =Average('worksheet 1'.$A$1:'worksheet 1'.$A100) =Max('worksheet 1'.$B$1:'worksheet 1'.$B100) =Min('worksheet 1'.$C$1:'worksheet 1'.$C100) =Sum('worksheet 1'.$D$1:'worksheet 1'.$D100) Pseudo formulas... =Average('worksheet 1'.$A$1:'worksheet 1'.$A*('worksheet 2'.$A$1)*) =Max('worksheet 1'.$B$1:'worksheet 1'.$B*('worksheet 2'.$A$1)*) =Min('worksheet 1'.$C$1:'worksheet 1'.$C*('worksheet 2'.$A$1)*) =Sum('worksheet 1'.$D$1:'worksheet 1'.$D*('worksheet 2'.$A$1)*) Where 'worksheet 2'.$A$1 would only contain a number corresponding to a row in 'worksheet 1'. After stumbling upon and playing with the indirect() function I have only been able to replace the entire cell reference (Column and Row) with any success. The formula so far =SUM('worksheet 1'.C3:INDIRECT(A1)) Where A1 is on 'worksheet 2' and contains a full cell reference pointing to 'worksheet 1'. Any pointers?

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  • How to create a function with vectors and vertical asymptote using MATLAB

    - by Pedro J Trinidad
    Plot the function f(x) = 1.5x / x-4 for -10 equal or less than X equal or less than 10. Notice that the function have a vertical asymptote at x = 4. Plot the function by creating two vectors for the domain of x. The first vector (call it x1) with elements from -10 to 3.7, and the second vector (calle it x2) with elements from 4.3 to 10. For each of the X vector create a Y vector (call them y1 and y2) with the corresponding values of Y according to the function. To plot the function make two curves in the same plot (y1 vs. x1 and y2 vs. x2).

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  • MySQL Create tables without commiting current transaction

    - by user276648
    I'd like my program to be able to install plugins, and rollback all the changes made if an error occurs. So I create a transaction that keeps all the things that were added while installing the plugin. The problem is that the plugin may want to create tables, and doing so automatically commits the current transaction in MySQL. See Statements That Cause an Implicit Commit on MySQL web site. Any idea on how I could do it? I thought of using temporary tables as they are not automatically commited, unless they are using too much memory, but it looks like temporary tables cannot be rolled back anyway (and I haven't found a way to convert them to permanent tables). I just found out about "save points" (http://dev.mysql.com/doc/refman/5.1/en/savepoint.html), but I don't really understand how/when it should be used nor if it can help me achieve what I want.

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  • Lua : Dynamicly calling a function with arguments.

    - by Tipx
    Using Lua, I'm trying to dynamicly call a function with parameters. What I want to have it done is I send a string to be parsed in a way that : 1st argument is a class instance "Handle" 2nd is the function to be called All that is left are arguments "modules" is a a table like { string= } split() is a simple parser that returns a table with indexed strings function Dynamic(msg) local args = split(msg, " ") module = args[1] table.remove(args, 1) if module then module = modules[module] command = args[1] table.remove(args, 1) if command then if not args then module[command]() else module[command](unpack(args)) -- Reference 1 end else -- Function doesnt exist end else -- Module doesnt exist end end When I try this with "ignore remove bob", by "Reference 1", it tries to call "remove" on the instance associated with "ignore" in modules, and gives the argument "bob", contained in a table (with a single value). However, on the other side of the call, the remove function does not receive the argument. I even tried to replace the "Reference 1" line with module[command]("bob") but I get the same result.

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