//格式化时间
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Date.prototype.format = function(format) {
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let o = {
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"M+": this.getMonth() + 1, //month
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"d+": this.getDate(), //day
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"h+": this.getHours(), //hour
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"m+": this.getMinutes(), //minute
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"s+": this.getSeconds(), //second
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"q+": Math.floor((this.getMonth() + 3) / 3), //quarter
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"S": this.getMilliseconds() //millisecond
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};
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if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
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(this.getFullYear() + "").substr(4 - RegExp.$1.length));
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for (let k in o)
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if (new RegExp("(" + k + ")").test(format))
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format = format.replace(RegExp.$1,
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RegExp.$1.length == 1 ? o[k] :
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("00" + o[k]).substr(("" + o[k]).length));
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return format;
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};
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// 对toFixed数字保留位数二次封装（ps：toFixed返回的是字符串）
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Number.prototype.toHold = function(value) {
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let hold = this.toFixed(value);
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hold = Number(hold);
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return hold;
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};
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