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  • Storing tree data in Javascript

    - by Ozh
    I need to store data to represent this: Water + Fire = Steam Water + Earth = Mud Mud + Fire = Rock The goal is the following: I have draggable HTML divs, and when <div id="Fire"> and <div id="Mud"> overlap, I add <div id="Rock"> to the screen. Ever played Alchemy on iPhone or Android? Same stuff Right now, the way I'm doing this is a JS object : var stuff = { 'Steam' : { needs: [ 'Water', 'Fire'] }, 'Mud' : { needs: [ 'Water', 'Earth'] }, 'Rock' : { needs: [ 'Mud', 'Fire'] }, // etc... }; and every time a div overlaps with another one, I traverse the object keys and check the 'needs' array. I can deal with that structure but I was wondering if I could do any better? Edit: I should add that I also need to store a few other things, like a short description or an icon name. So typicall I have Steam: { needs: [ array ], desc: "short desc", icon:"steam.png"},

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  • Javascript : random number between variables issue

    - by Mayhem
    I've seen the other examples on this site but I just can't get it to work. I'm trying to generate a random number between 2 user input variables on a form. The numbers will always be positive numbers. min = document.getElementById('min').value; max = document.getElementById('max').value; waitTimer = Math.floor(Math.random() * (max - min + 1)) + min; When min = 5 / max = 10, waitTimer is sometimes returning results like 2, 4 and 28 and so on. What am I doing wrong?

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  • Write a row to Google Spreadsheet programmically javascript

    - by Verber
    I'm trying to find a way to insert a row into a google spreadsheet dynamically. I have a list of objects that has all the data for every column in a row. I'm just trying to run a for loop and then send the data to the row in the spread sheet. But the spreadsheet is completely empty. So I don't know if that creates certain problems or not. for(var j=0; j < masterList.length; j++) { //tried this one but it didn't pan out sheet.appendRow([ masterList[j].Date, masterList[j].Name, masterList[j].Bugs, masterList[j].Enhancements, masterList[j].Epic, masterList[j].DevOps, masterList[j].High ]); }

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  • How to access a variable outside a function in Javascript

    - by Luke101
    Here is the code I am working with: $(document).ready(function () { var TemplateEditor = function () { var GroupClassName = 'group'; var SelectedGroup = 0; var BindClicks = function () { $('.CriteriaSelections').unbind('click').click(function (event) { event.preventDefault(); if (fnIsTheClickedBoxaGroup($(this))) { TemplateEditor.GroupClicked(); } else { TemplateEditor.CriteriaClicked($(this), SelectedGroup); } }); $('.groupselected').unbind('click').click(function (event) { event.preventDefault(); SelectedGroup = $(this).attr('group-'.length); TemplateEditor.SelectGroup(SelectedGroup); }); } var fnGetGroupID = function (Obj) { if (fnIsTheClickedBoxaGroup(Obj) == true) { return null; } else { //Get parent which is the group var ObjParent = Obj.parent(); var GID = ObjParent.attr('id').substr('group-'.length); return GID; } } var fnIsTheClickedBoxaGroup = function (Obj) { var GetClass = Obj.attr('class'); if (GetClass == GroupClassName) { return true; } else { return false; } } return { Init: function () { BindClicks(); }, CriteriaClicked: function (Obj, GroupID) { $('<div>').attr({ id: '' }).addClass('selection').text(Obj).appendTo('#group-' + GroupID); }, GroupClicked: function () { }, SelectGroupClicked: function () { }, UpdateTargetPanel: function () { } }; } (); TemplateEditor.Init(); }); I am trying to access this variable: GroupClassName This variable is inside this function var fnIsTheClickedBoxaGroup = function (Obj) { var GetClass = Obj.attr('class'); if (GetClass == GroupClassName) { return true; } else { return false; } } When I run the program it says GroupClassName is undefined. Am I missing something here?

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  • JavaScript, iPhone: Repeat Action while Holding Button

    - by Doug
    I am working on a website which I would like to work on iPhones, however I want it so they can tap and hold a button and have it continue firing the onclick event. I got it to work in other browsers, but the iPhone is the only one that will need to hold down the button. Is there a way to repeat a function when holding down the button? Thanks.

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  • Javascript Click/Drag and Select Table rows and columns

    - by Eric V
    Hi, I am wondering if anyone knows a java script library that would add a "select" type of functionality as seen in excel/google docs where you can click and select several different parts of a row and/or column. I am looking at adding this functionality to my web application. Does anyone know where of library's preferably in java script that will be able to add this. Thanks in advance

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  • Instantiate a javascript module only one time.

    - by Cedric Dugas
    Hey guys, I follow a module pattern where I instantiate components, however, a lot of time a component will only be instantiate one time (example: a comment system for an article). For now I instantiate in the same JS file. but I was wondering if it is the wrong approach? It kind of make no sense to instantiate in the same file and always only once. But at the same time, if this file is in the page I want to have access to my module without instantiate from elsewhere, and IF I need another instance, I just create another from elsewhere... Here is the pattern I follow: ApplicationNamespace.Classname = function() { // constructor function privateFunctionInit() { // private } this.privilegedFunction = function() { // privileged privateFunction(); }; privateFunctionInit() }; ApplicationNamespace.Classname.prototype = { Method: function(){} } var class = new ApplicationNamespace.Classname(); What do you think, wrong approach, or is this good?

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  • I try to hook a character from javascript keydown event

    - by user523978
    I would like to hook a character typed in an input text field and type '1' in the field in case 'a' was pressed. Here is the code: <html> function translate_code(charCode) { switch (charCode) { case 65: // return '1' ; case 97: return '9'; } } function noEnglish(event) { if (event.charCode) { var charCode = event.charCode; } else { var charCode = event.keyCode; } if (65

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  • Javascript clone form?

    - by user202987
    I need to copy a form information with all types of elements and send it with AJAX. Tried these: 1. cloneNode on the form. - Doesn't work with IE, only copies text stuff properly. cloneNode on each element. Doesn't work with IE, only copies text stuff properly. Making new textareas for each element, and copying the value in. Doesn't work for textareas in IE, formatting is lost. I imagine a combination of those 3 would work for IE and FF but is there any decent solution to this? Shortness of code is a priority.

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  • Listing known CSS classes using Javascript

    - by Fred Oliveira
    I'm trying to find a good way to collect the names of classes defined in the stylesheets included with a given document. I know about document.StyleSheetList but it doesn't seem like it'd be easy to parse. What I'm looking for is something like, for a stylesheet document such as: .my_class { background: #fff000; } .second_class { color: #000000; } I could extract an array like ["my_class", "second_class"]. This obviously assumes the favorable scenario of a fully loaded dom and stylesheets. I've been looking everywhere for a good way to do something like this and so far, have made little progress. Does anyone have any idea about how to pull this off? Thanks!

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  • Ruby javascript unescape equivalent

    - by vise
    I want to unescape the following string: '\u00020\u0002Standard\u00023\u0002Doe John\u000169\u0002\u0010\u0002Lorem\u0002\u0011\u0002Ipsum\u0002\u0014\u0002' Javascripts unescape function works ok, however how can I unescape it in ruby? Take in mind that unescape(previousString) is 0Standard3Doe John69LoremIpsum.

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  • equivalent of javascript class using JSON

    - by brz dot net
    See following class: function availItem(xs, s, m, l, xl) { this.xs = xs; this.s = s; this.m = m; this.l = l; this.xl = xl; } How can I declare the above class using JSON? I think It should be in following manner but problem is to pass argument. var availItem = { xs : xs, s : s, m : m, l : l, xl : xl }

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  • Ternary Operators in JavaScript Without an "Else"

    - by Oscar Godson
    I've been using them forever, and I love them. To me they see cleaner and i can scan faster, but ever since I've been using them i've always had to put null in the else conditions that don't have anything. Is there anyway around it? E.g. condition ? x=true : null ; basically, is there a way to do: condition ? x=true; Now it shows up as a syntax error...

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  • Javascript function returning number with two decimals...?

    - by muzzledBYbrass
    I have a function to return points along a line and my return comes back with two decimal points...? For example, a return of my variable px will be something like -88.4029.032940598. vx is the x vector and mult is the distance of the line plus distance to calculate the point. Here is the operation that is returning these values: var mult = parseFloat(mag + theUnit); var px = coord_one.x_point + (vx * mult); console.log(px); Never have seen this before- I appreciate any and all help!

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  • Adding an additional click event to every element (JavaScript / jQuery)

    - by Gausie
    I'm developing a touchscreen application that, aside from everything else, records the amount of times the screen is used so that the user can be reminded to clean the screen after a predefined number of clicks. I've got the click functions written nicely, all I need now is make sure the function is called on a click. I imagine $('*').click(function() { //do something }); would accomplish my goal, but is that the best way? Also, would that overwrite other click functions assigned to the elements?

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  • Javascript for loop efficiency

    - by Misha Moroshko
    Is for (var i=0, cols=columns.length; i<cols; i++) { ... } more efficient than for (var i=0; i<columns.length; i++) { ... } ? In the second variant, is columns.length calculated each time the condition i<columns.length is checked ?

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  • JavaScript array random index insertion and deletion

    - by Tomi
    I'm inserting some items into array with randomly created indexes, for example like this: var myArray = new Array(); myArray[123] = "foo"; myArray[456] = "bar"; myArray[789] = "baz"; ... In other words array indexes do not start with zero and there will be "numeric gaps" between them. My questions are: Will these numeric gaps be somehow allocated (and therefore take some memory) even when they do not have assigned values? When I delete myArray[456] from upper example, would items below this item be relocated? EDIT: Regarding my question/concern about relocation of items after insertion/deletion - I want to know what happens with the memory and not indexes. More information from wikipedia article: Linked lists have several advantages over dynamic arrays. Insertion of an element at a specific point of a list is a constant-time operation, whereas insertion in a dynamic array at random locations will require moving half of the elements on average, and all the elements in the worst case. While one can "delete" an element from an array in constant time by somehow marking its slot as "vacant", this causes fragmentation that impedes the performance of iteration.

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  • JavaScript inner function scope chain?

    - by Ding
    In this example var a = 1; ( function(x) { function inner() { alert(a); alert(x); alert(y); } var y = 3; inner(); })(2); When does function inner get created? during execution time or parsing time of outer anonymous function? What is in the scope chain of function inner? What is in the execution context of function inner? I know it is not a simple question, thanks for enlighting me in advance!

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  • Javascript methods, classes and events

    - by Randy Gurment
    Hi, how should I document this piece of code: // Is this class? colors = { // Is this method? "red" : function() { // Do something... } // Still method? "black" : { // So what is this? "black-1" : function() { /* Do something */ } } } I am using YUI Doc. These tags are available @module @class @method @event @property

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