AI代码解释 constunitObj={beforeUnit:'before',afterUnit:'after',yearUnit:'year',monthUnit:'month',dateUnit:' days ',hourUnit:'hour',minutesUnit:'min',secondUnit:'sec'}constshowData=timeBox.getDistanceNow('1908-12-02 06:00:00',unitObj);// 溥仪登基啦console.log('溥仪登基详细时间===',...
Math.round(.6) // => 1.0: round to the nearest integer Math.ceil(.6) // => 1.0: round up to an integer Math.floor(.6) // => 0.0: round down to an integer Math.abs(-5) // => 5: absolute value Math.max(x,y,z) // Return the largest argument Math.min(x,y,z) // ...
Number.MAX_SAFE_INTEGER表示最大整数(253-1),Number.MIN_SAFE_INTEGER表示最小整数-(253-1) //9007199254740991 trueconsole.log(Number.MAX_SAFE_INTEGER,Number.MAX_SAFE_INTEGER===Math.pow(2, 53)-1)//-9007199254740991 trueconsole.log(Number.MIN_SAFE_INTEGER,Number.MIN_SAFE_INTEGER===-(Math.pow(...
jsCopy to Clipboard var dateObjectName = new Date([parameters]); 这里的 dateObjectName 对象是所创建的 Date 对象的一个名字,它可以成为一个新的对象或者已存在的其他对象的一个属性。 不使用 new 关键字来调用 Date 对象将返回当前时间和日期的字符串 前边的语法中的参数(parameters)可以是一下任何一种...
JavaScript BigInt is a new datatype (ES2020) that can be used to store integer values that are too big to be represented by a normal JavaScript Number. Example letx = BigInt("123456789012345678901234567890"); Try it Yourself » You will learn more aboutBigIntlater in this tutorial. ...
console.log(dv.date(now).offsetNameLong) // 中国标准时间 console.log(dv.duration('8h30m').toObject()) // {hours: 8, minutes: 30} console.log(dv.duration('8h30m').toFormat("h'小时'm'分钟'")) // 8小时30分钟 console.log(dv.duration('8h30m').toHuman()) // 8小时、30分钟 ...
// trueconsole.log(+0 == -0); // trueconsole.log(false == false); // trueconsole.log(Number.MAX_SAFE_INTEGER == Number.MAX_SAFE_INTEGER); // trueconsole.log(null == null); // trueconsole.log(undefined == undefined); ...
'Fields'显示了我们图层的表模式。实际字段名与字段类型和字段的别名一起提到。别名和字段类型信息对于对数据执行查询是必要的。'esriFieldTypeString'和'esriFieldTypeSmallInteger'的字段类型表示该字段应分别被视为字符串和数字。'esriFieldTypeOID'是一种特殊类型的字段,它保存了图层中要素的唯一对象 ID。
Date.setUTCHours(hour,min,sec,millisec) Parameter Values ParameterDescription hourRequired. An integer representing the hour. Expected values are 0-23, but other values are allowed: -1 will result in the last hour of the previous day 24 will result in the first hour of the next day ...
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