Actionscript:
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initOperators();
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trace(zipWith("-", [1,2,3], [1,2,3]));
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trace(zipWith("+", [1,2,3], [1,2,3]));
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trace(zipWith("*", [1,2,3], [1,2,3]));
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trace(zipWith("+", [1,1,1,3], [4,5,6,7]));
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trace(zipWith("<<", [2, 4], [1,1]));
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/*
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outputs:
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0,0,0
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2,4,6
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1,4,9
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5,6,7,10
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4,8
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*/
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function zipWith(op:String, a:Array, b:Array):Array{
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var aLeng:int = a.length;
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var bLeng:int = b.length;
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var leng:Number = (aLeng <bLeng) ? aLeng : bLeng;
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var zipped:Array = [];
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if (!this[op])return [];
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for (var i:int = 0; i<leng; i++){
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zipped[i]=this[op](a[i], b[i]);
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}
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return zipped;
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}
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function initOperators():void{
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this["+"]=function(a:Number, b:Number):Number{ return a + b };
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this["-"]=function(a:Number, b:Number):Number{ return a - b };
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this["/"]=function(a:Number, b:Number):Number{ return a / b };
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this["*"]=function(a:Number, b:Number):Number{ return a * b };
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this["%"]=function(a:Number, b:Number):Number{ return a % b };
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this["&"]=function(a:Number, b:Number):Number{ return a & b };
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this["<<"]=function(a:Number, b:Number):Number{ return a <<b };
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this["|"]=function(a:Number, b:Number):Number{ return a | b };
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this[">>"]=function(a:Number, b:Number):Number{ return a>> b };
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this[">>>"]=function(a:Number, b:Number):Number{ return a>>> b };
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this["^"]=function(a:Number, b:Number):Number{ return a ^ b };
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}
This snippet is basically like the haskell zipWith() function. It can combines two arrays into one array given a single function. In this case I defined a bunch of operator functions, but it would work with any kind of function that takes two arguments and returns a value. You could extend this to work with strings and do other strange things I guess.
If you have yet to go play with haskell ... go do it now.
