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Array of ID values

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Oct 03.2007

Hi, I need to take an array and see if there is already an occurrence of the ID in the array. How would I go about looping though the array to see if the ID is already in there. Any help would be greatly appreciated. Cheers

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JavaScript

2 Comments(s) ↴

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@WebnerdOct 03.2007 — <i>
</i>function in_array(stack, value){

var found=false;

for(k=0;k&lt;stack.length;k++){

<i> </i> if(stack[k]==value) found=true;

}

return found;

}

var arr=['test','this','out'];

alert(in_array(arr,'test'));
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@WebnerdOct 03.2007 — or this way

<i>
</i>Array.prototype.find = function(searchStr) {
var returnArray = false;
for (i=0; i&lt;this.length; i++) {
if (typeof(searchStr) == 'function') {
if (searchStr.test(this[i])) {
if (!returnArray) { returnArray = [] }
returnArray.push(i);
}
} else {
if (this[i]===searchStr) {
if (!returnArray) { returnArray = [] }
returnArray.push(i);
}
}
}
return returnArray;
}

var arr=['check','this','out'];

alert(arr.find('check').length);



Which returns an array of matches. Check .length property to see if a match was found
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