1.求阶乘
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function factorial(num){ if(num<=1){ return 1; }else{ return num*arguments.callee(num-1); } } |
2.求随机数n到m之间的数，包含m和n
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function selectFrom(lowerValue,upperValue){ return Math.floor(Math.random()*(upperValue-lowerValue+1)+lowerValue); } |