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47 lines
702 B
47 lines
702 B
/**
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* @param {number} x
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* @return {number}
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*/
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var reverse = function(x) {
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var sign = 1;
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var magnitude = 1;
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var reverse = 0;
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var digits = [];
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if (x < 0){
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sign = -1;
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x = x * sign;
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}
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if (x === 0){
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return reverse;
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}
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while (x > 0){
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digits.push(getTensDigit(x));
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x = popDigit(x);
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}
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for (var i = digits.length -1; i >= 0; --i){
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reverse += (digits[i] * magnitude);
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magnitude *= 10;
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}
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if (reverse > 2147483647){
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return 0;
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}
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reverse = reverse * sign;
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return reverse;
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};
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function getTensDigit(value){
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var digit = value % 10;
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return digit;
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}
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function popDigit(value){
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value = Math.floor(value / 10);
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return value;
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}
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