Iterate Through An Array Using CharAt?
Sep 14, 2010
In this program i attempting to iterate through an array using the charAt () function and then store these element positions in a new array called elementPositions.
The user selects a flightDestination from the flightDestinations array which is stored elsewhere, and what my program needs to do, is find all the array elements positions where the same flight destination name occurs in my array.
I then need to store these positions so i can use them elsewhere, and i'm pretty sure i need to use charAt() but i think my syntax may be wrong - contained in the for loop.
var yourDestination = readTheDestination();
var title = "<B>" + "You asked about Flights to " + "<B>" + "<BR>";
var flightInfo;
var solution = "";
[Code]....
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Jul 10, 2007
I know that using for in loop to iterate over array elements is a bad
idea but I have a situation where it is tempting me to use it. I have
a two dimensional sparse array say "arr" which will have length to be
some 50 but will have some elements like arr[1], arr[10], arr[23] at
random locations. Each of these elements is again an array (since it
is two dimensional) say arr[1][30], arr[1][24] & so on for arr[10 &
23] also. Currently I've coded it like this:
for (var i = 0; i < arr.length; i++) {
for (var j = 0; j < arr[i].length; j++) {
if (arr[i] && arr[i][j]) {
// do stuff with arr[i][j]
}
}
}
but i am tempted to do following
for (var i in arr) {
if (!arr.hasOwnProperty(i)) {
continue;
}
for (var j in arr[i]) {
if (arr[i].hasOwnProperty(j)) {
// do stuff with arr[i][j]
}
}
}
thinking it to be faster. What are your views?
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Oct 11, 2009
Is it possible to iterate through an anonymous array of strings with a for loop?
Here's what I'm trying to do:
for ( i in ['country', 'city', 'state'] ) {
doSomethingWithString(i);
}
What I want is the string, but what I'm getting is the index number of the array, which I can't use because the array isn't named.
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Jul 1, 2009
I'm trying to figure out how to do this via Javascript.
Lets say I have an array like so:
var myArray = [11, 33, 44, 23, 32, 43];
var finalArray = new Array();
And I have the following variables
var lastNumber = 33;
var getNext = 2;
I want to use the lastNumber for a starting point in the array and then based on getNext, grab the next x numbers that getNext specifies and shove into finalArray.
That case moves forward in the array.
Second case would be the opposite, get the previous x numbers based on getPrevious in the array. So I'd start at lastNumber and then grab x numbers before it based on getPrevious.
var lastNumber = 33;
var getPrevious = 2;
I'm not sure if you can traverse backwards in JavaScript. But more importantly I'm not sure how to point to lets say 33. How can I do myArray[1] essentially based on I'm pointing to 33 and then how can I grab the next x in myArray ?
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May 5, 2010
I'm trying to interate through an array of objects. Here's my code:
$('form').submit(function(){
var serializeArr = $(this).serializeArray();
jQuery.each(serializeArr, function(i, obj){
alert('Hi');
}
});
However, this just fails. It seems like its getting stuck on the serializeArray aka an array of objects. I've gone the for loop route and it worked fine up until I started doing some ajax stuff...the variable binding behavior was all over the place and unusable.
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Dec 3, 2010
I am loading a Html table through jquery ajax. In this table each row has a check box . when i click the check box i want to get all the details in the row. but i could not iterate through the table.
when i use $("#civilBillTable1 tr[class="+row+"]" ).each(function(){}); works perfectly, but the table is not loaded through jquery ajax
if i use below code, it will not work
$('input.chkAddItem').live('click',function(){
var itemId,description,unit,rate;
$("#civilBillTable1").live()('each',function(){ // the table is loading through Ajax
alert("h");
[Code]....
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Jan 25, 2009
Can anyone tell me how to iterate javascript map dynamically like java.util.hashmap
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Jan 10, 2011
I have some checkboxes on a form like this: -
Code HTML4Strict:
<form id="EventForm" name="EventForm" method="post">
<input name="EventRecur[]" type="checkbox" class="checkbox" value="EveryDay" />
<input name="EventRecur[]" type="checkbox" class="checkbox" value="Monday" />
<input name="EventRecur[]" type="checkbox" class="checkbox" value="Tuesday" />
</form>
[Code]...
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Nov 20, 2010
I have a problem in Javascript that I really cant figure out, I've tried for days! here it goes: I need to iterate through a form and get all the elements that has a class like "required" and then, save this elements id, because I have label elements that has a for="" tag with the same as the id for the input/dropdown in the form. To all these labels I need to apply a "*" in the end of the label. And all this in an onload function.
I have tried everything I can come up with but now I'm close to giving up so now I need help, how can I get these values and do this?
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Sep 4, 2010
I'm trying to iterate through all the dropdownboxes on a page without much success! What I'd like to do is store the selected value for each of the dropdowns, separated by commas in a variable when a button is clicked. Each of the dropdown boxes 'id' begins with the string 'attrib-' which is how I'm trying to identify them.
I've managed to hide all the dropdowns with this code:
jQuery(document).ready(function() {
jQuery("#myButton").click(function() {
jQuery("[id^=attrib-]").hide();
})
})
So I thought I could do something similar to get the selected value but I can't figure it out.
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Jan 29, 2011
I have a form on which I've created 5 checkbox groups. Each of these groups consist of multiple checkboxes. The first group - it's id equals "MASTER" - contains 4 checkboxes. These checkboxes are labelled (that is, their actual label tags are) "A", "B", "C", "D". My vision is to have a user check, say, "A" in MASTER and this causes the "A" checkbox group to appear below the MASTER group. If a user then checks "B" in MASTER, then the "B" group appears below the "A" group. If the user then unchecks "A", then the "A" group disappears. And similarly for each of the four "subordinate" groups. My plan of attack was to iterate over the MASTER checkbox group, and for each checked box, somehow populate an array of their associated label tags. I would do the same for all of the checkboxes in MASTER that are not checked, placing their label tags in another array. I would then show and hide the subordinate checkbox groups based on these label tags. The subordinate groups have label tags equal to these captured label tags in these two arrays. All of this action would be triggered via a "click" action on the tag in which the MASTER group resides. I've tried all manner of techniques, including "$.each" and ".map" to populate arrays. I just can't get my mind around the needed syntax.
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Sep 1, 2011
why doesn't this work? Is there a way to get this type of iteration to work?
for (i = 1; i < numOfButtons; i++) {
$('#navbutton-' + i).click(function(){
updateStage(i);
[Code]....
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Dec 21, 2010
In my page I have pairs of divs like this:
Code HTML4Strict:
<div class="rounded red">
<p>Integer egestas neque vitae dui ultricies vel venenatis mi varius! </p>
</div>
[code]....
This works,in that it at least added the new class whereas the other solutions didn't. Unfortunately it counts EVERY div, not just the ones with the class .client, I can't set my array of desired classes, and I have no idea how to make it restart the count after it hits #4.
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Feb 9, 2010
Is it possible to iterate over user-defined objects in Internet Explorer? Iterating over objects in top in Firefox (v 3.5) finds user-defined objects, but it does not in Internet Explorer (v 7).
Code:
function myFunc() {}
for(var obj in top) { alert('objname=' + obj); }
In FF the above will find myFunc, and in Internet Explorer it will not. Should I be checking a different scope?
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Feb 1, 2011
Is it possible to access local variables like I access global ones, ie. window["hey"] retrieves the global variable "hey".
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Jul 16, 2009
As soon as the page loads, I would like to iterate through several span tags on the page and update their innerHTML to be the response from the AJAX get call. The line I have commented out, alert("Data Loaded: " + data);, works perfectly, but creates a bunch of alert boxes (which I don't want). And if I move the line "this.innerHTML =data;" out of the Ajax call, it works fine also. So I know all the syntax is correct. But when I put it together as outlined below, it just won't work. The Ajax is working, I also see the GET calls working fine in the Firebug console. It just won't update the innerHTML of the SPAN tags.
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May 13, 2009
how I would be able to convert a string of html into a series of div elements that I can iterate through and perform jquery functions on, specifically .hide() and .slideDown(). For example, I retrieve a string from a jquery ajax call of html that looks something like this,
<div class="post" id="post2918">
<div class="header">
Some Text
</div>
[Code]....
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Oct 13, 2009
I would like to use JQuery to iterate through a set of <div> elements that have the same class and scale each value according to a value selected from a dropdown box. For example,
<select id="factor">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
[Code].....
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Oct 23, 2009
I cant get this each function to work inside a form: For example I have this code:
$('#formid>input').each(function(){
if($(this).attr('id')!='') alert($(this).attr('value'); //fetch id if
not blank ang show value
});
The code inside this function does not run if the form is rendered this way:
<form><div id='tabs" >
<ul>...</ul><div id='tab1">
<input type='text' id='fname' /></div>
</div></form>
But if it is rendered in a simplier way like this, it works:
<form><input type='text' id='fname' /></form>
I am using jquery jquery-ui-1.7.2.custom.main.js library by the way for the tabs but I don't think that messes up the whole thing though...
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Dec 22, 2011
I wish to get the values for the 3rd and 4th cell of each row where these contain drop down menus. I've tried various ways but my code doesn't seem to iterate through rows of a table. I can get the values for the first row, but not the rest. There's isn't a fixed row size for the table as the user will be able to add and delete them.
I've put the values in separate arrays but instead of the array containing say [10, 20] it contains [10, 10] as it just duplicates the first row's values.
Here's my code that I have so far:
function calculate(){
var len = document.getElementById(arguments[1]).rows.length;
var cMenus = [];
var gMenus= [];
[Code]...
I've tried adding j to the arguments or putting it in "[]" but nothing seems to work. I don't think the platform I'm using supports jquery,
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Aug 2, 2011
I am very new to JavaScript / JQuery... Need to iterate over the following segment of code and either return an array or single value the e-mail addresses assigned to these labels (these are hardcoded as the check boxes values):
<div id="emailCheckListId" class="checkList">
<ul id="emailCheckListId_ul">
<li>
<label for="root.module.emailCheckList_0" class="checkListLabel">
<input type="checkbox" value="johndoe@aol.com" id="root.module.emailCheckList_0" name="root.module.emailCheckList"/>
[Code]...
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Jun 17, 2011
I have now been playing around for hours trying to figure this out. Swore I would not ask for a solution. Now I have a headache, so I am asking. On one HTML Page (From.htm) I have:
[Code]...
I somehow, need to get the values as shown in the handle function for each of Products shown in From.htm. Keep in mind the only thing I know from From.htm is the class names. I have no idea what products are listed or what the input names are. This table is generated by a third party. Assume that index.htm and From.htm are on the same website.
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Mar 2, 2009
I want to create an associative array dynamically pulling the index values from an array (propertyArray); Associative array is created inside create function and then returned. But after it is returned, I cant use index names to retrieve values. It returns undefined as below code shows.
Code JavaScript:
var propertyArray=["a","b","c"];
function create(){
var array=[];
[code]....
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Jan 21, 2011
Modifying my code:
I have this C# code that is connecting to database and creating a array(list)
Code:
I'm trying to pass it to a javascript function so I can then pass it to a silverlight page so I was able to create this easy javascript that show a aleart box on startup of the list(array)
Code:
But I want to do something like this and can't get it:
Code:
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Feb 15, 2011
I am trying to understand somecode. I don't think I am understanding everything correctly. Can someone confirm or add to my understanding?
Here is the code, below is my explanation:
- CODE 1 - is saying if the the class subnav_dd is called on an anchor tag on a li, then make the function in the if statement "live". (Live in a sense binds the function to the condition, but unlike bind it allows the condition to be used more then once. ) So if the class subnav_dd is the parent, and has a class of .dis then prevent anything below it from firing. CSS - If code 1 is true, then I will only get the first li to fire, the remaining ones will not.
- CODE 2 - This one is a little tricky. Function ToggleOptions takes 3 variables (target, array, state). The condition is if the div subnav + target have siblings, then check to see how many siblings are there. Put the amount of siblings into an array, then check the state of each sibling. I don't completely the rest of it.
I think if the div subnav is called and something is found in the array then the class dis is either added or removed. Then what? I don't understand why I still need the else that adds a class to #subnav_ +.target
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Sep 17, 2010
What is the correct syntax for an nested array where each array element has 3 elements, a number and two text strings?
Code:
array = ['1, Old Man, Old Man','2 Black Sheep, Black Sheep',....]
should the text strings be in double quotes("")?
Code:
array = ['1, "Old Man", "Old Man"','2 "Black Sheep", "Black Sheep"',....]
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