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Introduction to using functions opposite to Math.pow_Basic knowledge

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WBOYOriginal
2016-05-16 16:40:182869browse
var a = [1,2,4,32,128];
 
var b = [];
 
for(var i=0;i<a.length;i++){
var index = Math.log(a[i])/Math.log(2);
b.push(index);
}
 
//b = [0,1,2,5,7];
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