Currently, my goal is to create an Array.prototype function called union( array_to_union ), and then utilize it in the following manner:
var a = [1,2,3];
a.union([2,3,4]).union([1,3,4]) ......
I am aiming for the outcome to be the union of these arrays. How can I achieve this?
My understanding is that I need to employ
Array.prototype.union = function( array_to_union){.....}What do you think of this solution:
Array.prototype.merge = function (secondArray) {
return secondArray.reduce(function (mergedArray, currentValue) {
if (this.indexOf(currentValue) === -1) mergedArray.push(currentValue);
return mergedArray;
}, this).sort();
};
var arr = [1, 2, 3];
arr = arr.merge([2, 3, 4]).merge([1, 3, 4]);
arr = [1, 2, 3, 4]
This method not only merges arrays but also sorts the resulting array, just like you wanted in your examples.
Combine arrays together with the union function:
Array.prototype.union = function(array_to_combine) {
for (i = 0; i < array_to_combine.length; i++) {
this.push(array_to_combine[i]);
}
return this;
}
var x = [10,20,30];
x.union([40,50,60]).union([70,80,90]);
Note: The union function in this example simply merges one array onto another without concern for sorting or uniqueness of values.
For more examples and demonstrations, visit this JS fiddle link: http://jsfiddle.net/enW2Y/1/
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