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• Why do I need the isset() function in php?

  - by Chris

  I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do something } It seems to me that if the $_POST['Submit'] variable is true, then it is set. Why would I need the isset() function in this case?

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• What does (function( $ ){...})( jQuery ); do/mean?

  - by Derek Adair

  Hi, I am a bit new to reusable plugins for jquery. I have ran across this code several times and can't figure out exactly what is going on. (function( $ ){ ... })( jQuery ); Can any one enlighten me?

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• Why is ColdFusion adding whitespace when I put the output of a function in a string?

  - by Kip

  If I do something like this in ColdFusion: <cfoutput>foo="#foo()#"</cfoutput> The resulting HTML has a space in front of it: foo=" BAR" However, if it is not a function call it works fine, i.e.: <cfset fooOut=foo() /> <cfoutput>foo="#fooOut#"</cfoutput> Gives this output: foo="BAR" Where is this extra space coming from and is there anything I can do about it?

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• Should the function or the caller be resonsible for input validation?

  - by haudenschilt

  I'm doing a security audit on a fairly large php application and was wondering where I should include my user-input validation. Should I validate the data, then send the clean data off to the back-end functions or should I rely on each function to do it's own validation? Or even both? Is there any standard or best-practice for this sort of thing? Currently the app does both inconsistently and I'll like to make things more consistent.

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• Django. Invalid keyword argument for this function. ManyToMany

  - by sagem_tetra

  I have this error: 'people' is an invalid keyword argument for this function class Passage(models.Model): name= models.CharField(max_length = 255) who = models.ForeignKey(UserProfil) class UserPassage(models.Model): passage = models.ForeignKey(Passage) people = models.ManyToManyField(UserProfil, null=True) class UserProfil(models.Model): user = models.OneToOneField(User) name = models.CharField(max_length=50) I try: def join(request): user = request.user user_profil = UserProfil.objects.get(user=user) passage = Passage.objects.get(id=2) #line with error up = UserPassage.objects.create(people= user_profil, passage=passage) return render_to_response('thanks.html') How to do correctly? Thanks!

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• Why is ColdFusion adding whitespace when I call a function in cfoutput?

  - by Kip

  If I do something like this in ColdFusion: <cfoutput>foo="#foo()#"</cfoutput> The resulting HTML has a space in front of it: foo=" BAR" However, if it is not a function call it works fine, i.e.: <cfset fooOut=foo() /> <cfoutput>foo="#fooOut#"</cfoutput> Gives this output: foo="BAR" Where is this extra space coming from and is there anything I can do about it?

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• How to get the absolute path of the file in a function that's called in PHP?

  - by user198729

  in file.php: call()... How to get absolute path of file.php inside call() ? Pay attention that call() may be defined in another file. another.php: function call(){..} file.php: include(path_to_another.php); call();

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• How can I call javascript function when DIV position is change ?

  - by Jimit

  Hello everyone, I need to call javascript function when div position is changed.how can I achieve that event of changed div position ?. any idea ?

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• What is the purpose of a self executing function in javascript?

  - by Ej

  In javascript, when would you want to use this: (function(){ //Bunch of code... })(); over this: //Bunch of code...

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• C#: Specify that a function arg must inhert from one class, and implement an interface?

  - by Rosarch

  I'm making a game where each Actor is represented by a GameObjectController. Game Objects that can partake in combat implement ICombatant. How can I specify that arguments to a combat function must inherit from GameObjectController and implement ICombatant? Or does this indicate that my code is structured poorly? public void ComputeAttackUpdate(ICombatant attacker, AttackType attackType, ICombatant victim) In the above code, I want attacker and victim to inherit from GameObjectController and implement ICombatant. Is this syntactically possible?

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• How do I use inverted commas in the echo function in PHP?

  - by iTayb

  How do I use inverted commas in the echo function in PHP? echo "<script type="text/javascript">"; doesnt work well. Thank you!

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• Eclipse: how to show the information about a function?

  - by user248959

  Hi, when i go with the mouse pointer on the function it doesn't show the location, class... i have this problem in one of my projects. All is executed ok so the functions are there :). Build id: 20090920-1017 Any idea? Javi

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• Resize a MovieClip on AS2 in function of text len?

  - by DomingoSL

  Hello, i have a AS2 script who get information from a MySQL database. This information is a text from 0 to 300 chars. I want to display that text in this layout: I want to resize the black box you see on the picture in function of the amount of text imported. Any idea of how to do that on AS2? The instance name of the box is: cargador.fondo (only want to resize height) The instance name of the text is: cargador.texto Thanks.

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• What does "void (* parse_arg_function)(const char*)" function argument mean in C?

  - by user118657

  What does the last function argument mean in C language? Please, point to documentation where I can read about it. void parse_options( int argc, char **argv, const OptionDef *options, void (* parse_arg_function)(const char*) ) Thanks.

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• How to write such a stored function in MySQL?

  - by user198729

  The function essentially contains 2 statements: statement1; and statement2; If statement1 fetches some records,just return them as result;If it doesn't fetch any result,return the result of statement2.

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• There was a function in C to adjust background color? (It was actually a Dos Command)

  - by LuckySlevin

  Hi, I am looking for the system function to adjust background color. It was like system("color",somecolorcodes); Does anyone know about it?

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• How can I customize my layout.xml from code before calling setContentView(View) function?

  - by Marton_hun

  I would like to customize my layout definition (declared in my_layout.xml file) from code. Unfortunately I can use findViewById() function to find the specific views (defined in my_layout.xml file) and customize them from code only after I called setContentView(R.layout.my_layout). But what if I want to customize my layout first, before calling setContentView()? How can I access the specific views before calling setContentView()?

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• Writting a getter for a pointer to a function .

  - by nomemory

  I have the following problem: "list.c" struct nmlist_element_s { void *data; struct nmlist_element_s *next; }; struct nmlist_s { nmlist_element *head; nmlist_element *tail; unsigned int size; void (*destructor)(void *data); int (*match)(const void *e1, const void *e2); }; /*** Other code ***/ What will be the signature for a function that returns 'destructor' ?

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• Function equivalent to sprintf() with maximum number of characters to be copied?

  - by Tommy

  function(char* name) { char sql[50]; sprintf(sql, "select %s;", name); } What's the best way to make sure only 50 chars of name are copied to sql in the case name is larger than what sql can hold? (sprintf with a N parameter?) Thank You.

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• jQuery slideDown function makes the scrollbar to be hidden .reason ?

  - by Bunny Rabbit

  How can i hide the scrollbar of using css/jQuery? i notice that the slideDown() function makes the scrollbar to be hidden but i can't understand why(the precise reason/behaviour).

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• c++: Is it possible to #include inside a function body?

  - by donalmg

  I want to include a header file only if a certain function body is called? Is this possible or recommended in C++?

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• PHP Editor that able to trace dependency of all function in a file with models/controllers or anothe

  - by justjoe

  hello a friend of mind ask something about php editor for his companion on coding. PHP Editor that able to trace dependency of all function in a file with models/controllers or another part of a framework (or something we had code). Basicly we use notepad++ but seeking another alternative.

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• jQuery: click() function doesn't work on the <a> element.. why ?

  - by Patrick

  hi, I cannot trigger this click on this element $(this).find('.views-field-field-cover-fid').find('a.imagecache-coverimage').click(); The jQuery path is correct. Indeed if I print it, it gives the correct a element: console.log($(this).find('.views-field-field-cover-fid').find('a.imagecache-coverimage')); But for some reason the function click() doesn't work on it. thanks

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• When virtual destructor is not needed even there is a virtual function, Why ?

  - by skydoor

  It says that if there is a virtual function, it is a good practice to have a virtual destructor. However, if the object is created on the stack but not on heap, do we still need to do that? Regards,

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• Is there a PHP equivalent function to the Python os.path.normpath()?

  - by troex

  Is there a PHP equivalent function to the Python os.path.normpath()? Or how can i get the same functionality in PHP?

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