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silianlinyi/factorial.js

Created November 21, 2013 13:35
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构建一个带尾递归的函数。因为它会返回自身调用的结果，所以它是尾递归。
Raw
factorial.js
function factorial(i, a) {
a = a || 1;
if(i < 2) {
return a;
}
return factorial(i - 1, a * i);
}
factorial(4); // => 24
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