== 0 || 1 / x === 1 / y; } else { // return true if both x AND y evaluate to NaN. // The only possibility for a variable to not be strictly equal to itself // is when that variable evaluates to NaN (example: Number.NaN, 0/0, NaN). // This checks for...
7、判断两个 Oject 是否相等 isEqualObject 8、判断 Object 是否为空 isEmptyObject 9、判断字符串是否存在 isExist 10、获取小程序链接的地址栏参数 GetWxMiniProgramUrlParam 1、判断是否为数值函数 isNumber 代码语言:javascript 代码运行次数:0 运行 AI代码解释 function isNumber(val){ if(val==""){ return...
// Check if variable is equal to value if (username === "sammy_shark") { console.log(true); } 输出: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 true 如前所述,变量可以用来表示任何JavaScript数据类型。在本例中,我们将使用字符串、数字、对象、布尔值和null值声明变量。 代码语言:javascr...
<=less than or equal to ?ternary operator Note Comparison operators are fully described in theJS Comparisonschapter. JavaScript String Comparison All the comparison operators above can also be used on strings: Example lettext1 ="A"; lettext2 ="B"; ...
==equal toif (day == "Monday") >greater thanif (salary > 9000) <less thanif (age < 18) The Boolean value of an expression is the basis for all JavaScript comparisons and conditions. Everything With a "Value" is True Examples
toJsDate(value: TDate): Date; parseISO(isString: string): TDate; toISO(value: TDate): string; parse(value: string, format: string): TDate | null; getCurrentLocaleCode(): string; is12HourCycleInCurrentLocale(): boolean; /** Returns user readable format (taking into account localized...
Returns whether the current node is equal to the specified one. When we speak about nodes in JavaScript, it exactly means node object references. Two node references are the same if they reference to the same object.
Arcade's When() function is used to evaluate the wind direction (between 0-360 degrees), which returns the associated compass direction of either N, NE, E, SE, S, SW, W, or NW. If the wind speed is 0, then no direction is returned. The final line of the expression returns the ...
const isArrayB = Array.isArray(b) if (isArrayA && isArrayB) { return a.length === b.length && a.every((e, i) => { return looseEqual(e, b[i]) }) } else if (a instanceof Date && b instanceof Date) { return a.getTime() === b.getTime() ...
3.2、方法二,toFixed保留小数位数,依然存在精度问题 3.3、方法三,mathjs - npm pnpm add mathjs Weekly Download 580197 (20230324) 3.4、方法四,bignumber.js - npm Weekly Download 8826960 (20230324) pnpm add bignumber.js const num = new BigNumber(1234567890.0123456789) ...