Edit: extract

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Description:	Imports variables into symbol table from an array.

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Code:	function extract (arr, type, prefix) { // http://jsphp.co/jsphp/fn/view/extract // + original by: Brett Zamir (http://brett-zamir.me) // % note 1: Only works by extracting into global context (whether called in the global scope or // % note 1: within a function); also, the EXTR_REFS flag I believe can't be made to work // * example 1: size = 'large'; // * example 1: var_array = {'color' : 'blue', 'size' : 'medium', 'shape' : 'sphere'}; // * example 1: extract(var_array, 'EXTR_PREFIX_SAME', 'wddx'); // * example 1: color+'-'+size+'-'+shape+'-'+wddx_size; // * returns 1: 'blue-large-sphere-medium' if (Object.prototype.toString.call(arr) === '[object Array]' && (type !== 'EXTR_PREFIX_ALL' && type !== 'EXTR_PREFIX_INVALID')) { return 0; } var targetObj = this.window; if (this.php_js && this.php_js.ini && this.php_js.ini['phpjs.extractTargetObj'] && this.php_js.ini['phpjs.extractTargetObj'].local_value) { // Allow designated object to be used instead of window targetObj = this.php_js.ini['phpjs.extractTargetObj'].local_value; } var chng = 0; for (var i in arr) { var validIdent = /^[_a-zA-Z$][\w|$]*$/; // TODO: Refine regexp to allow JS 1.5+ Unicode identifiers var prefixed = prefix + '_' + i; try { switch (type) { case 'EXTR_PREFIX_SAME' || 2: if (targetObj[i] !== undefined) { if (prefixed.match(validIdent) !== null) { targetObj[prefixed] = arr[i]; ++chng; } } else { targetObj[i] = arr[i]; ++chng; } break; case 'EXTR_SKIP' || 1: if (targetObj[i] === undefined) { targetObj[i] = arr[i]; ++chng; } break; case 'EXTR_PREFIX_ALL' || 3: if (prefixed.match(validIdent) !== null) { targetObj[prefixed] = arr[i]; ++chng; } break; case 'EXTR_PREFIX_INVALID' || 4: if (i.match(validIdent) !== null) { if (prefixed.match(validIdent) !== null) { targetObj[prefixed] = arr[i]; ++chng; } } else { targetObj[i] = arr[i]; ++chng; } break; case 'EXTR_IF_EXISTS' || 6: if (targetObj[i] !== undefined) { targetObj[i] = arr[i]; ++chng; } break; case 'EXTR_PREFIX_IF_EXISTS' || 5: if (targetObj[i] !== undefined && prefixed.match(validIdent) !== null) { targetObj[prefixed] = arr[i]; ++chng; } break; case 'EXTR_REFS' || 256: throw 'The EXTR_REFS type will not work in JavaScript'; case 'EXTR_OVERWRITE' || 0: // Fall-through default: targetObj[i] = arr[i]; ++chng; break; } } catch (e) { // Just won't increment for problem assignments } } return chng; }
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