forked from mirrors/0ad
elexis
37 lines
667 B
JavaScript
37 lines
667 B
JavaScript
/**
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* returns a clone of a simple object or array
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* Only valid JSON objects are accepted
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* So no recursion, and only plain objects or arrays
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*/
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function clone(o)
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{
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let r;
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if (o instanceof Array)
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r = [];
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else if (o instanceof Object)
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r = {};
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else // native data type
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return o;
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for (let key in o)
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r[key] = clone(o[key]);
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return r;
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}
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/**
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* "Inside-out" implementation of Fisher-Yates shuffle
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*/
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function shuffleArray(source)
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{
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if (!source.length)
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return [];
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let result = [source[0]];
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for (let i = 1; i < source.length; ++i)
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{
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let j = Math.floor(Math.random() * (i+1));
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result[i] = result[j];
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result[j] = source[i];
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}
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return result;
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}
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