Iterate Array And Grab X Numbers Based On Pointer?
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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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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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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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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lets say that I have a page that has multiple galleries. Obviously I would have to make each literal array with the gallery data different names, ex:
var _gallery1 = {
'images': [
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[Code]....
obviously "galVariable" would be undefined... as i'm trying to get "_gallery2.images" but trying to use "galVariable" to point to "_gallery2"
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Is there a way of displaying the id of the element under the pointer ?
Please dont ask why I need it, but I do, i found tools that needs
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like to turn on this feature using a flag in my url. Something like
debug=1.
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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');
}
});
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Dec 10, 2010
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Code so far:
<html>
<title>Homework 5</title>
<body>
<script>
var num = new Array();
var x = 0;
var lastnum;
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num[x] = window.prompt("Please enter a number between 100-999:");
if((num[x] < 100) || (num[x] > 999)){
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num.sort();
window.alert(num);
} break;
}} window.alert("DONE");
</script>
</body>
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Jul 6, 2010
I have an array which is populated by a count of instances from another array, so its ends up with data like:
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At present, a .sort() would put 1 - 9 before anything greater than 10, obviously not what I'm after.
How can I make it put this array into the correct order (e.g 22 x something else, 17 x another event, 5 x that event, 2 x this event)
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Nov 9, 2010
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<html>
<head>
<title>Calc Numbers</title>
[code]....
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[Code]...
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Code:
document.images["destination"].src = images[i]
That would then produce an <a> with the href equal to the function name + "i" with the title being "i" as well.
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Code:
<script type="text/javascript">
$(document).ready(function(){[code]...............
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<script type="text/javascript">
var sum;
var i=0;
[code]....
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var i=0;
for (i=1;i<=10;i++)
{
if (i == 1)
[Code]....
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05 06 07 08
09 10 11 12
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13 09 05 01
14 10 06 02
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<html>
<head>
<title>Rotate Array Matrix</title>
</head>
<body>
[Code].....
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function insert(val)
{[code].....
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<body>
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Apr 20, 2009
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PHP Code:
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PHP Code:
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Code:
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