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• Is there thing like pass by value pass by reference in JavaScript ?

  - by Anil Namde

  When i started learning function in C++ its all around pass by value and reference. Is there something similar we have in javascript ? If yes/not how it works in case of javascript? Thanks all.

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• How Can I Know If An Input Is Checked If I Only Know His Value?

  - by Metal Sonic

  Hello here! I have a dynamic input in my php code like this one: <input type="checkbox" id="advantage[]" name="advantage[]" value="Special Option" /> And I need to know if it's checked... I can have multiple checks in the same format in the code, my brain hurts because i can't find a solution! Thanks 4 the help!

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• MySql selecting default value if there are no result?

  - by Kenan

  i'm having 2 tables: members and comments. I select all members, and then join comments. But in comments I'm selecting some SUM of points, and if user never commented, I can't get that user in listing?! So how to select default value for SUM, or some other solution: SELECT c.comment_id AS item_id, m.member_id AS member_id, m.avatar, SUM(c.vote_value) AS vote_value, SUM(c.best) AS best, SUM(c.vote_value) + SUM(c.najbolji)*10 AS total FROM members m LEFT JOIN comments c ON m.member_id = c.author_id GROUP BY c.author_id ORDER BY m.member_id DESC LIMIT {$sql_start}, {$sql_pokazi}

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• How to get a value from the last inserted row?

  - by eflles

  Is there some way to get a value from the last inserted row? I am inserting a row where the PK will automatically increase, and I would like to get this PK. Only the PK is guaranteed to be unique in the table. I am using Java with a JDBC and PostgreSQL.

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• How could I pass the float number by value in obj-c?

  - by user313439

  - (void)applicationDidFinishLaunching:(UIApplication *)application{ // Override point for customization after application launch [window makeKeyAndVisible]; [self printFloat:1.3f]; } - (void)printFloat:(float)f { NSLog(@"%f",f); } I passed the "1.3f" to printFloat, but it was the wrong value (in this case, -2.000000) after "f" received. And there is a warning that "AppDelegate may not respond to -printFloat:" Where did I get it wrong? Thanks.

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• How can I convert this column value to an integer?

  - by Kevin

  My C# code looks like this: myNum = dt.Columns[0]; myNum is an integer and dt is a datatable. The value in column 0 of dt is a string ("12"), but I'd like to convert it to an integer. How can I do this? I've tried: myNum = int.Parse(dt.Columns[0]); ...but that doesn't work. Any ideas?

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• How to structure a table for additional data if a particular value of an enum/lookup table is chosen

  - by Soliah

  I'd like to store additional data if a particular value is chosen in the enumerated or looked-up column in a table. The obvious option is to have an extra column in the table, but this will lead to a mostly empty column and seems to be like bad approach. Is there another option/method of doing this?

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• Is there a better way to check if a value is bigger than of type double?

  - by user342231

  double x; cin>>x; if( x > 1.7976931348623157e+308 || x < -1.7976931348623157e+308 ) { cout<<"value not in range"<<endl; exit(1); } Is there like a DOUBLE_MAX or DOUBLE_MIN and would I need to include any header files?

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• Easiest way to get Enum in to Key Value pair.

  - by vijay.shad

  Hi, I have defined my Enums like this. public enum UserType { RESELLER("Reseller"), SERVICE_MANAGER("Manager"), HOST("Host"); private String name; private UserType(String name) { this.name = name; } public String getName() { return name; } } What should be the easiest way to get a key-value pair form the enum values?

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• Is there a way to limit an integer value to a certain range without branching?

  - by Matt Wamboldt

  Just out of curiosity. If I have something like: if(x < 0) x = 0; if(x > some_maximum) x = some_maximum; return x; Is there a way to not branch? This is c++.

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• efficient way to check if at least one row contains a null value in a DataView ?

  - by benj007

  Hi everybody, I need to do a test in a DataView to check if at least one row contains one cell with a null value. What is the best way to do it in your opinion ? Thanks in advance.

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• jQuery Selectable only select 1 and get a value?

  - by jphenow

  This might seem like an odd request but I'd like to use jQuery's Selectable tool to only select one item at a time and I'd like it to show me a value I'll have within each tag. At the very least I want the contents of that selection. Has anyone tried to do this? For some reason these little things seem to not be all that easily findable in their API for it.

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• Why is ++i considered an l-value, but i++ is not?

  - by yesraaj

  Why is ++i is l-value? and i++ not Initially there were 2 questions one was removed since that was exact duplicate. So don't down vote the answers that were answering difference between pre- and post-increment.

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• Is passing a struct value to a method by-reference in C# an acceptable optimization?

  - by Arc

  Say I have a struct: struct MyStruct { public int X public int Y } And a method in some class that is iterated over many times elsewhere: public bool MyMethod( MyStruct myStruct ) { return ... } Is changing the MyMethod signature to the following an acceptable optimization? public bool MyMethod( ref MyStruct myStruct ) If so, how much of an advantage would it really be? If not, about how many fields would a struct need for a big enough advantage using ref this way?

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• how to add default value to the textbox helper through viewdata in asp.net mvc?

  - by Renu

  i want to add default value to the html text box by the view data. the foolwing code will give an idea wht i want to do exactly <%= Html.TextBox("quantity", <%= Html.Encode(ViewData["quantity"]) %, new { maxlength = 4 })% but it shows an error. plz tel me the solution for this. thank in advance....

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• Simple way to print value of a register in x86 assembly.

  - by Bob

  I need to write a program in 8086 Assembly that receives data from the user, does some mathematical calculations and prints the answer on the screen, I have written all parts of the program and all work fine but I don't know how to print the number to the screen. At the end of all my calculation the answer is AX and it is treated as an unsigned 16 bit integer. How do I print the decimal (unsigned) value of the AX register?

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• how to split the numeric values from alphanumeric string value using javascript?

  - by user188390

  how to split the numeric values from alphanumeric string value using java script? for example, x = "example123"; from this i need 123 thanks.

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• How to get Attachment value from "$File" Item? using C# (Lotus Notes).

  - by Pari

  Hi, I am trying to access Attachment names form "$File" (Lotus Notes). NotesView inbox = _serverDatabase.GetView("($Inbox)"); NotesDocument docInbox = inbox.GetFirstDocument(); NotesItem file = docInbox.GetFirstItem("$File"); String fileType = file.type.ToString(); ( getting fileType value "ATTACHMENT" for mail containing attachments) I am not getting solution given in: http://stackoverflow.com/questions/1361695/how-to-access-attachments-from-notes-mail

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• how to get the filed mapName 's value on a form.. uding django

  - by zjm1126

  my form is class MapForm(forms.ModelForm): class Meta: model = Map fields = ('mapName', 'kmlStr') and the view is : map_form = MapForm(request.POST or None) if map_form.is_valid(): map = map_form.save(commit=False) map.mapName=map_form.mapName#is thie code right ? how to get the mapName 's value , us 'map_form.mapName' ? thanks

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• How to find the row ID from datagridview, given a row value?

  - by user361108

  Hi, Can anyone help me please? I have to find the row number from 1 selected array which I stored in one separate array and randomly I'm trying to get the row number from datagridview http://serv8.enterupload.com/i/00246/aewglahmvpr5.jpg In other words: if I know a column value for a given row in a datagridview (e.g. for this row, FirstName == 'Bud'), how can I get the row ID?

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• How can I count the number of elements of a given value in a matrix?

  - by niko

  Does anyone know how to count the number of times a value appears in a matrix? For example, if I have a 1500 x 1 matrix M (vector) which stores the values of weekdays (1 - 7), how could I count how many Sundays (1), Mondays(2), ... , Saturdays(7) are stored in M?

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• how do i check the value inside a text feild while using ruby selenium testing?

  - by Mo

  i am running a selenium test using ruby and was wondering how i can assert the value inside a text field? i have a page where once its loaded has text inside the editable text field and i was wondering how i can check if the text is present? thank you

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• How i can i use the value of a variable from one class in another in objective c?

  - by user337174

  Hi i am fairly new to objective c and have been doing some iphone programming. Is it possible to look up the value of a variable in a different class? Basically what i am doing is running a function that exists in my app delegate from a view controller, but the app delegate needs to use a variable stored in the view controller from which the app delegate function was called. Make sense??? Any help would be grateful. James

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• C++ catch blocks - catch exception by value or reference?

  - by John

  I always catch exceptions by value. e.g try{ ... } catch(CustomException e){ ... } But I came across some code that instead had catch(CustomException &e) instead. Is this a)fine b)wrong c)a grey area?

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• How do i validate two component's value are same or not? JSF

  - by Nitesh Panchal

  Hello, As we hav comparevalidator in Asp.Net, what do we have in JSF to validate whether two field's value are same or not? I want to validate password and confirmPassword field.

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