javascript JS -计算字符串中出现的次数[已关闭]结果为：2（字符串包含'，' & '.'）...
javascript JS -计算字符串中出现的次数[已关闭]结果为：2（字符串包含'，' & '.'）...
array[index] = array[randomInedx]; array[randomInedx] = middleware; } return array; } 浏览器对象 BOM 判读浏览器是否支持 CSS 属性 /** * 告知浏览器支持的指定css属性情况 * @param {String} key - css属性,是属性的名字,不需要加前缀 * @returns {String} - 支持的属性情况 */ function valida...
/** * @param {String} key 属性 * @param {*} value 存贮值 * @param {String} expire 过期时间,毫秒数 */export const sessionStorageSetExpire = (key, value, expire) => { if (typeof (value) === 'object') value = JSON.stringify(value); sessionStorage.setItem(key, value); setTimeout...
11. `countOccurrences`:检测数值出现次数 constcountOccurrences= (arr, val) => arr.reduce((a, v) =>(v === val ? a +1: a),0);countOccurrences([1,1,2,1,2,3],1);// 3 12. `deepFlatten`:递归扁平化数组 constdeepFlatten= arr => [].concat(...arr.map(v=>(Array.isArray(v)...
* @param { string } value */ export const isIMEI = value => /^\d{15,17}$/g.test(value); 验证必须带端口号的网址(或ip) /** * @param { string } value */ export const isHttpAndPort = value => /^((ht|f)tps?:\/\/)?[\w-]+(\.[\w-]+)+:\d{1,5}\/?$/g.test(va...
/** * @param {String} key 属性 * @param {*} value 存贮值 * @param { number } expire 过期时间,毫秒数 */ export const localStorageSetExpire = (key, value, expire) => { if (typeof (value) === 'object') value = JSON.stringify(value); localStorage.setItem(key, value); setTimeou...
Return all of the items in the collection before the specified count. Opposite of after.Paramsarray {Array} n {Number} returns {Array}: Array excluding items after the given number.Example<!-- array: ['a', 'b', 'c'] --> {{before array 2}} <!-- results in: '["a", "b"]'...
minify(ast, { compress: {}, mangle: {}, output: { ast: true, code: true // optional - faster if false } }); // result.ast contains native Uglify AST // result.code contains the minified code in string form. Working with Uglify AST Transversal and transformation of the native AST ...
const countOccurrences = (arr, value) => { return arr.reduce((a,v) =>{ return v === value ? a + 1: a + 0 },0) } 统计数组元素出现次数 const countedNames = (arr) => { return arr.reduce(function (accr, name) { if (name in accr) { ...