JavaScript end
Advances array argument's internal pointer to the last element and return it
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 2526 27 28 29 3031 32 33 34 3536 37 38 39 4041 42 43 44 4546 47 48 49 5051 52 53 54 55 | function end ( arr ) { // Advances array argument's internal pointer to the last element and return it // // version: 1001.2911 // discuss at: http://phpjs.org/functions/end // + original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // + bugfixed by: Legaev Andrey // + revised by: J A R // + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // + restored by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // + revised by: Brett Zamir (http://brett-zamir.me) // % note 1: Uses global: php_js to store the array pointer // * example 1: end({0: 'Kevin', 1: 'van', 2: 'Zonneveld'}); // * returns 1: 'Zonneveld' // * example 2: end(['Kevin', 'van', 'Zonneveld']); // * returns 2: 'Zonneveld' // BEGIN REDUNDANT this.php_js = this.php_js || {}; this.php_js.pointers = this.php_js.pointers || []; var indexOf = function (value) { for (var i = 0, length=this.length; i < length; i++) { if (this[i] === value) { return i; } } return -1; }; // END REDUNDANT var pointers = this.php_js.pointers; if (!pointers.indexOf) { pointers.indexOf = indexOf; } if (pointers.indexOf(arr) === -1) { pointers.push(arr, 0); } var arrpos = pointers.indexOf(arr); if (!(arr instanceof Array)) { var ct = 0; for (var k in arr) { ct++; var val = arr[k]; } if (ct === 0) { return false; // Empty } pointers[arrpos+1] = ct - 1; return val; } if (arr.length === 0) { return false; } pointers[arrpos+1] = arr.length - 1; return arr[pointers[arrpos+1]]; } |
Examples
» Example 1
Running
1 | end({0: 'Kevin', 1: 'van', 2: 'Zonneveld'}); |
Should return
1 | 'Zonneveld' |
» Example 2
Running
1 | end(['Kevin', 'van', 'Zonneveld']); |
Should return
1 | 'Zonneveld' |
Dependencies
No dependencies, you can use this function standalone.
Open syntax issues
php.js uses JsLint to help us keep our code consistent and prevent some common bugs.
Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.
Authors
Thanks to the following developers, you get to have end goodness in JavaScript.
Brett Zamir
Jan 22nd 
@Itsacon, Thanks...The fix had already been applied a while ago (indexOf is supported in Firefox, etc., so that was the reason for the mistake). Anyhow, you can see the current version if you click "raw js source". Btw, the reason for the rest of the "convoluted" code is to support tracking of the array "pointer" (as in PHP). end() moves the pointer to the end. We use the "this.php_js" global (or object property in the namespaced version) to hold this information. See next(), prev(), etc. for some other functions which keep track of the array's pointer.
@Kevin, what will it take to get the site to update to reflect the latest git updates? It seems this fix was made a month ago...Thanks...
Itsacon
Jan 21st
The current version fails hard in Internet Explorer (both versions 7 and 8)
indexOf() is a method of the String object, not of the Array object, so calling it on pointers (an Array()) isn't valid javascript code.
I've reverted to the older version, which was less convoluted and worked fine:
1 2 3 4 56 7 8 9 1011 12 13 14 1516 | function end(array) { var last_elm,key; if(array.constructor==Array) { last_elm=array[(array.length-1)]; } else { for(key in array) { last_elm=array[key]; } } return last_elm;} |
Itsacon
Jan 22nd
Strange, the problem cropped up when I updated my php.js, so maybe the version in the lib-build-tool is also still using the older one.
Thanks for the quick response (and the explanation)