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adrianparr on 03/17/10

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Last Edited at 03/17/10 11:09am

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AS3 Using Push, Pop, Unshift and Shift on Arrays

/ Published in: ActionScript 3

I always forget which method does what. This is just as a quick reminder.

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var myArray:Array = new Array();

// PUSH
// Adds one or more elements to the end of an array and returns the new length of the array.
myArray = ["a","b","c","d"];
trace(myArray);
myArray.push("e");
trace(myArray);
// OUTPUT
// a,b,c,d
// a,b,c,d,e

// POP
// Removes the last element from an array and returns the value of that element.
myArray = ["a","b","c","d"];
trace(myArray);
myArray.pop();
trace(myArray);
// OUTPUT
// a,b,c,d
// a,b,c

// UNSHIFT
// Adds one or more elements to the beginning of an array and returns the new
// length of the array. The other elements in the array are moved from their 
// original position, i, to i+1.
myArray = ["a","b","c","d"];
trace(myArray);
myArray.unshift("_");
trace(myArray);
// OUTPUT
// a,b,c,d
// _,a,b,c,d

// SHIFT
// Removes the first element from an array and returns that element.
// The remaining array elements are moved from their original position, i, to i-1.
myArray = ["a","b","c","d"];
trace(myArray);
myArray.shift();
trace(myArray);
// OUTPUT
// a,b,c,d
// b,c,d

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