A map function that can map over almost anything.
Execute a function
fn for each
Values returned from
fn are appended to an array which is
returned by the map function.
map(obj, fn, squash);
fnwill be called for each
index. This can be an Array, Object, String, Number or whatever.
index. Review the callback function section below.
fn is called it is passed the following arguments:
index, or attribute name from the object which is being mapped.
functionpassing it a value to explicitly push a new value onto the final array.
functionto stop iterating over
Any value returned from the callback function will be appended to the final array.
The only excpetion to this would be if
sqash is set to true in which case any
undefined or null return value would NOT be appended to the final array.
a = 405021;b = mapa//key is the index in the arrayif val > 10return val;;// b = [40, 50, null, null];//this time we will sqash falsy valuesc = mapa//key is the index in the arrayif val > 10return val;true; //turn on squash// c = [40, 50];//map over an object;d = customer_id : 1 name : 'Willy Wonka' ;e = mapdemitval;return key;;//e = [1, 'customer_id', 'Willy Wonka', 'name'];
These examples aren't that great. I typically use this function to map over arrays of objects that come from a database query.
Copyright (c) 2012 Daniel L. VerWeire
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