Created
July 4, 2016 19:30
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Combine objects
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/** | |
* combine objects | |
* | |
* gets arrays with possible @param values, like | |
* [{a:1},{a:2}], [{b:'one'}, {b:'two'}], [{c:4,d:5},{c:7,d:9}] | |
* @returns all param values combinations | |
* [{ a: 1, b: 'one', c: 4, d: 5 }, | |
* { a: 2, b: 'one', c: 4, d: 5 }, | |
* { a: 1, b: 'two', c: 4, d: 5 }, | |
* { a: 2, b: 'two', c: 4, d: 5 }, | |
* { a: 1, b: 'one', c: 7, d: 9 }, | |
* { a: 2, b: 'one', c: 7, d: 9 }, | |
* { a: 1, b: 'two', c: 7, d: 9 }, | |
* { a: 2, b: 'two', c: 7, d: 9 }] | |
*/ | |
let combineObjects = function () { | |
let dst = [], | |
dst_len = 1, | |
alen = arguments.length, i, ai; | |
for (i = 0; i < alen; ++i) { | |
dst_len *= arguments[i].length; | |
} | |
for (i = 0; i < dst_len; ++i) { | |
let item = {}, | |
idx = i; | |
for (ai = 0; ai < alen; ++ai) { | |
Object.assign( item, arguments[ai][idx % arguments[ai].length] ); | |
idx = Math.floor( idx / arguments[ai].length ); | |
} | |
dst.push( item ); | |
} | |
return dst; | |
}; | |
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