function composition - Page 668

Iterating Through a jQuery Object Array

- by DeltaFox

I know this has been asked and answered a couple times already, but I'm still confused about how to reference the current object when iterating over a jQuery array. For example, the following code gives me the error "TypeError: genH3Array[i].next is not a function". What is the right way to reference the current array object? var genH3Array = $('#Generation_II').parent(); genH3Array.push($('#Generation_III').parent());; genH3Array.push($('#Generation_IV').parent()) $.each(genH3Array, function(i, value) { if(genH3Array[i].next().attr("align") == "center") { genH3Array[i].next().next().next().insertBefore(heading.next()) } genH3Array[i].next().next().insertBefore(heading.next()) genH3Array[i].next().insertBefore(heading.next()) })

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Margin adjustments when using ggplot's geom_tile()

- by chris_dubois

From the documentation for ggplot2's geom_tile() function, we have the following simple plot: > # Generate data > pp <- function (n,r=4) { + x <- seq(-r*pi, r*pi, len=n) + df <- expand.grid(x=x, y=x) + df$r <- sqrt(df$x^2 + df$y^2) + df$z <- cos(df$r^2)*exp(-df$r/6) + df + } > p <- ggplot(pp(20), aes(x=x,y=y)) > > p + geom_tile() How do I remove the margins that border the tile?

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prevent linux thread from being interrupted by scheduler

- by johnnycrash

How do you tell the thread scheduler in linux to not interrupt your thread for any reason? I am programming in user mode. Does simply locking a mutex acomplish this? I want to prevent other threads in my process from being scheduled when a certain function is executing. They would block and I would be wasting cpu cycles with context switches. I want any thread executing the function to be able to finish executing without interruption even if the threads' timeslice is exceeded.

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Oracle - pl sql selecting from SYS_REFCURSOR

- by Einstein

I have a function that returns a SYS_REFCURSOR that has a single row but multiple columns. What I'm looking to do is to be able to have a SQL query that has nested sub-queries using the column values returned in the SYS_REFCURSOR. Alternative ideas such as types, etc would be appreciated. Code below is me writing on-the-fly and hasn't been validated for syntax. --Oracle function CREATE DummyFunction(dummyValue AS NUMBER) RETURN SYS_REFCURSOR IS RETURN_DATA SYS_REFCURSOR; BEGIN OPEN RETURN_DATA SELECT TO_CHAR(dummyValue) || 'A' AS ColumnA ,TO_CHAR(dummyValue) || 'B' AS ColumnB FROM DUAL; RETURN RETURN_DATA; END; --sample query with sub-queries; does not work SELECT SELECT ColumnA FROM DummyFunction(1) FROM DUAL AS ColumnA ,SELECT ColumnB FROM DummyFunction(1) FROM DUAL AS ColumnB FROM DUAL;

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Combining Arrays in Javascript

- by Bigbohne

Maybe it's to late in germany (1:04AM) or I'm missing something... How can I combine these two arrays: a = [1, 2, 3] and b = [a, b, c] so that i get: [[1, a], [2, b], [3, c]] Thank and ... spend more time sleeping! :) Edit: Ok, i see this function i called "zip". +1 Knowledge And there is no builtin function in Javascript for this. +1 Knowledge And I should have said that the arrays are equal in length. -1 Knowledge ... = positiv day. Thx

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What is the opposite of Jquery .not - OR - How to I target href links that contain the following....

- by stolkramaker

Right. So here we go. I am currently using the following code to target all links and apply an iframe toolbar $("a[href^='http:']").not("[href*='www.domiain.com']").not("[href*='www.twitter.com']").each(function(){ var tempurl = 'http://www.domain.com/shiftbar/shiftbar.html?iframe='; var $this = $(this); var currenturl = this.getAttribute("href"); var href = tempurl + currenturl; $this.attr('href', href ); }); I need to do the same, but now for links that ONLY contain twitter $("a[href^='http:']").contains("[href*='www.twitter.com']").each(function(){ $this.attr("target", "_blank"); }); it doesn't work. I've tried .has .contains But I suppose I am not familiar with jquery enough at this point.

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Fastest algorithm to check if a number is pandigital?

- by medopal

Pandigital number is a number that contains the digits 1..number length. For example 123, 4312 and 967412385. I have solved many Project Euler problems, but the Pandigital problems always exceed the one minute rule. This is my pandigital function: private boolean isPandigital(int n){ Set<Character> set= new TreeSet<Character>(); String string = n+""; for (char c:string.toCharArray()){ if (c=='0') return false; set.add(c); } return set.size()==string.length(); } Create your own function and test it with this method int pans=0; for (int i=123456789;i<=123987654;i++){ if (isPandigital(i)){ pans++; } } Using this loop, you should get 720 pandigital numbers. My average time was 500 millisecond. I'm using Java, but the question is open to any language.

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Some exam questions about C++ vectors and arrays...

- by xbonez

Hey guys, I have a CS exam tomorrow. Just want to get a few questions cleared up. Thanks a lot, and I really appreciate the help. Que 1. What are parallel vectors? Vectors of the same length that contain data that is meant to be processed together Vectors that are all of the same data type Vectors that are of the same length Any vector of data type parallel Que 2. Arrays are faster and more efficient than vectors. True False Que 3. Arrays can be a return type of a function call. True False Que 4. Vectors can be a return type of a function call. True False

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Python 3: Most efficient way to create a [func(i) for i in range(N)] list comprehension

- by mejiwa

Say I have a function func(i) that creates an object for an integer i, and N is some nonnegative integer. Then what's the fastest way to create a list (not a range) equal to this list mylist = [func(i) for i in range(N)] without resorting to advanced methods like creating a function in C? My main concern with the above list comprehension is that I'm not sure if python knows beforehand the length of range(N) to preallocate mylist, and therefore has to incrementally reallocate the list. Is that the case or is python clever enough to allocate mylist to length N first and then compute it's elements? If not, what's the best way to create mylist? Maybe this? mylist = [None]*N for i in range(N): mylist[i] = func(i)

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Can I increase the scope of 'this' in the following example?

- by Stomped

In using a jquery callback, I found that 'this' isn't defined anymore. I've found a work around, which is to set 'this' to another variable. For example, like so: function handler(DATA) { myThis = this; $.post( 'file.php', DATA, function() { // THIS where I need access to 'this', but its not available // unless I've used the 'myThis' trick above } ); } It works like this, but I am always looking for 'the right way' or 'the better way' to do things. Is this the best way? or is there another?

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problem with the drop down menu with jquery

- by amir

Hi Basically I have some links which include some other links, I'm trying to show the parent links only and when one clicks on the parent link the child links should appear and when one clicks on the parent link again the child link should disappear, the code works for the first click and it opens the relevant child links but how do I make them disappear when I click on the parent link again, thanks for the help. jQuery.noConflict(); jQuery(document).ready(function(e) { jQuery('.nav-container ul.level0 li.level1 a').click(function(e) { e.preventDefault(); jQuery(this).css({'background':'#000000','color':'#ffffff'}); jQuery('.nav-container ul.level0 li.level2 a').css('display','block'); }); });

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Live() keyword not working on load with dynamic html images

- by Sara Chipps

I have images being dynamically added to a page, I don't seem to be able to get the 'load' event working dynamically with live(). This is the code I currently have: $('#largeImg' + nextUniqueItemID).hide(); $('#largeImg' + nextUniqueItemID).live('load' , function() { $('#loader' + nextUniqueItemID).hide(); $('#largeImg' + nextUniqueItemID).show(); }); with '#largeImg' + nextUniqueItemID being an image that was added to the page earlier in the function and '#largeImg' + nextUniqueItemID being a loading image. I feel as if I may be misusing "live" as it doesn't really need a listener but to trigger the event immediately.

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Isolating read and write in multithreaded

- by the_lotus

Hi In a multithreaded application. I have a bunch of function that loop through a collection to read the information. I also have a bunch of function that modifies that same collection. I’m looking for a way to isolate all the read and the write together. I don’t want a write to be done while a read is in progress. I was thinking of using SyncLock on the collection object but this will block multiple read trying to work in parallel.

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Translate This git_parse_function to zsh?

- by yar

I am using this function in Bash function parse_git_branch { git_status="$(git status 2> /dev/null)" pattern="^# On branch ([^${IFS}]*)" if [[ ! ${git_status}} =~ "working directory clean" ]]; then state="*" fi # add an else if or two here if you want to get more specific if [[ ${git_status} =~ ${pattern} ]]; then branch=${BASH_REMATCH[1]} echo "(${branch}${state})" fi } but I'm determined to use zsh. While I can use this perfectly as a shell script (even without a shebang) in my .zshrc the error is a parse error on this line if [[ ! ${git_status}}... What do I need to do to get it ready for zshell? Note: I realize the answer could be "go learn zsh syntax," but I was hoping for a quick hand with this if it's not too difficult.

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jquery datepicker - retrieve events and show on hover in dialog - allow the a href to be clicked to access individual event entries

- by paul724

Please see this jsfiddle - http://jsfiddle.net/paul724/HXb6v/ What is working: The datepicker displays correctly, picks up the css for todays date and on hover. The dialog box follows the mouse On click the dialog box "stops" and displays a link What I want to achieve When a table cell is hovered over the title of the dialog box shows the date e.g "Mon 8th Oct 2012" When a table cell is hovered over the html of the dialog box shows the events for that day in list format (there is code that succesfully retrieves the first row in function getSelectedDates() ) function getSelectedDates() needs to be called in the hover event - showing multiple events for that date in the dialog box I hope that if we can display the date being hovered over in the title of the dialog then we can use the same information to retrieve the rows from the database to populate the html of the dialog for that day

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an error "variable of field declared void"

- by lego69

I have this code: header - test.h Inside header I have some class Z and definitions of two functions test and test2 I call function test2 from test void test2(Z z, Z const *za); this is implementation of the function: void test2(Z z, Z const *za){ int i = z; //this row works cout << i << endl; } I call it from test: test2(z1, za1); // za1 is pinter to object and z1 is some object but in my header I receive an 3 errors: Multiple markers at this line - initializer expression list treated as compound expression - `A' was not declared in this scope - variable or field `quiz2' declared void can somebody please explain why? thanks in advance

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Updating GUI Component from a different class C# WPF

- by Boardy

Hi all, I am trying to update a GUI component (DataGrid) in one class from a different class. I am using C# and WPF Forms. When I used the standard WF forms I could pass a reference to the GUI component as a parameter to the function that needed to do the work with the DataGrid. However, I do not know how I can do this in WPF. I have Class1 which has the GUI component and I need Class3 to run the function inside Class2 which will automatically update the GUI display of the Datagrid found in Class1. Any help with this would be much appreciated.

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How to pass int value to a ajax enabled wcf service method?

- by Pandiya Chendur

I am calling an ajax enabled wcf service method from my aspx page... <script type="text/javascript"> function GetEmployee() { Service.GetEmployeeData('1','5',onGetDataSuccess); } function onGetDataSuccess(result) { Iteratejsondata(result) } </script> and my method doesn't seem to get the value [OperationContract] public string GetEmployeeData(int currentPage,int pageSize) { DataSet dt = GetEmployeeViewData(currentPage,pageSize); return GetJSONString(dt.Tables[0]); } when i used a break point to see what is happening in my method currentPage has a value0x00000001 and pageSize has 0x00000005 Any suggestion what am i doing wrong....

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Can I create functions without defining it in the header file?

- by Nick Brooks

Can I create a function inside a class without defining it in the header file of that class?

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code in xmlhttp.readyState==4 doen't get executed

- by shazia

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Laravel 4 Aliases in custom classes

- by Leonel Franchelli

i want to use the alias classes on laravel 4 "facades" like App::method , Config::method. Well the thing is that i create a custom class and i have to import the namespaces like <?php namespace Face\SocialHandlers; use Illuminate\Support\Facades\App; use Illuminate\Support\Facades\Config; class FacebookHandler implements SocialHandlerInterface { public function registrar($perfil) { Config::get('facebook'); } } is there any way to use those classes like in controllers or routes files of the framework ? like <?php namespace Face\SocialHandlers; //use Illuminate\Support\Facades\App; //use Illuminate\Support\Facades\Config; class FacebookHandler implements SocialHandlerInterface { public function registrar($perfil) { Config::get('facebook'); } } Cya ps: sry for my english

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How to hide an element after $compile?

- by Miron

How to hide directive generated html after inserting it to body? Directive has "replace" set to trueThere is a directive: .directive('location', function () { return { restrict : 'A', scope : {}, replace : true, templateUrl: 'common/components/location/location.html', link : function (scope, element, attr) {……} } }); So it is used in another directive: var scope = $rootScope.$new(true); var directive = $compile('<div location></div>')(scope); $document.find('body').append(directive); directive.hide(); - not working How to hide directive generated html after inserting it to body? Directive has "replace" set to true

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Set the mouseover Attribute of a div using JQuery

- by Abs

Hello all, I would like to set an attribute for a div. I have done this: $('#row-img_1').onmouseover = function (){ alert('foo'); }; $('#row-img_2').onmouseout = function (){ alert('foo2'); }; However, the above has not worked, it does not alert when mouse is over or when it moves out. I have also tried the $('#row-img_1').attr(); and I could not get this to work either. I am aware that I should be using a more effective event handling system but my divs are dynamically generated. Plus this is a small project. ;) Thanks all for any help.

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How to get the Jquery row ID on single click

- by kumar

var value; $("#Grid1").click(function(e) { var row = jQuery(e.target).parent(); value= row.attr("id"); }); var onrowclick = function() { ("#Grid1").click($("#showgrid").load('/Names/Friends/satish/' + value)); }; i am trying to send the value on URL.. when I am giving like this I am not getting the output result... am I doing this correctly? is the problem that I am handling click event on same grid two times?

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sorting nested list, allow only li to be sorted witin the same ul

- by Y.G.J

$(document).ready(function() { $("#test-list").sortable({ items: "> li", handle : '.handle', axis: 'y', opacity: 0.6, update : function () { var order = $('#test-list').sortable('serialize'); $("#info").load("process-sortable.asp?"+order+"&id=catid&order=orderid&table=tblCats"); } }); $("#test-sub").sortable({ containment: "ul", items: "li", handle : '.handle2', axis: 'y', opacity: 0.6, update : function () { var order = $('ul').sortable('serialize'); $("#info").load("process-sortable.asp?"+order+"&id=catid&order=orderid&table=tblCats"); } }); }); <ul id="test-list"> <li id="listItem_10">first<img align="middle" src="Themes/arrow.png" class="handle" /></li> <li id="listItem_8">second<img align="middle" src="Themes/arrow.png" class="handle" /> <ul id="test-sub"> <li id="listItem_4"><img align="middle" src="Themes/arrow.png" class="handle2" /></li> <li id="listItem_3"><img align="middle" src="Themes/arrow.png" class="handle2" /></li> <ul id="test-sub"> <li id="listItem_9"><img align="middle" src="Themes/arrow.png" class="handle2" /></li> </ul> </li> </ul> </li> </ul> the problems i have: sorting the main ul is working but not all the time - i will try to fix that my own but if there is a problem with the code here and not the one in proccess-sortable - tell me. moving li in the main ul is ok but the sub or the sub of the sub is having problem - i can drag something from one sub to it's sub or the other way too - i don't want that to happend. i want to be able to drag li and by selecting that one that only this ul group will send to proccess-sortable to be updated - how can i catch the specific ul of li i am draging?

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- by DeltaFox

- by chris_dubois

- by johnnycrash

- by Einstein

- by Bigbohne

- by stolkramaker

- by medopal

- by xbonez

- by mejiwa

- by Stomped

- by amir

- by Sara Chipps

- by the_lotus

- by yar

- by paul724

- by lego69

- by Boardy

- by Pandiya Chendur

- by Nick Brooks

- by shazia

- by Leonel Franchelli

- by Miron

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- by kumar

- by Y.G.J

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