JWS（JSON Web Signature）就是这样一种方法，它使用 JSON 格式来加密和验证数据。JavaScript 是个很神奇...
We concatenate an array with a string and another array. The string is added as a single element. The nested array's elements are added individually, not as a nested array. $ node main.js [ 'red', 'green', 'blue', 'yellow', 'purple' ] Concatenating nested arrays...
Property/method value type: String primitive JavaScript syntax: - myArray.join(aSeparator) Argument list: aSeparator A string to place between array elements as the array is concatenated to form a string. //无参join()方法默认是用逗号连接 */ document.write("arr.join() is " + arr.join()...
我在本地用Benchmark对上述两种方法做了性能对比,测试环境为Testing in Chrome 46.0.2490 / Mac OS X 10.10.4,结果如下: concat#+ x 90,483,047 ops/sec ±2.06% (84 runs sampled) concat#array-jion x 12,303,912 ops/sec ±0.90% (82 runs sampled) concat#string-concat x 40,845,196 ops/se...
split 分开,通过()中的字符使String分开 split()是对字符串进行操作,不会改变原对象,会返回一个数组 vara ='abc'varb = a.split('b')//b=['a','c'] join 拼接,通过()中的字符使obj拼接成字符串 join()方法将数组作为字符串返回,不会改变原数组,会返回一个字符串 ...
Property/method value type: String primitive JavaScript syntax: - myArray.join(aSeparator) Argument list: aSeparator A string to place between array elements as the array is concatenated to form a string. //无参join()方法默认是用逗号连接 ...
console.log(joinedString); // Output: JavaScript is fun. Run Code concat() Syntax The syntax of the concat() method is: str.concat(str1, ..., strN) Here, str is a string. concat() Parameters The concat() method takes in an arbitrary number of strings to concatenate to str. conc...
JavaScript JS String JS Number JS Operators JS Statements JS Math JS Date JS Array JS Boolean JS RegExp JS Global JS Conversion Browser BOM Window Navigator Screen History Location HTML DOM DOM Document DOM Elements DOM Attributes DOM Events DOM Style HTML Objects <blockquote>...
为了方便操作基本数据类型,JavaScript 还提供了三个特殊的引用类型:String、Number和 Boolean。 基本包装类型:就是把简单数据类型包装成为复杂数据类型,这样基本数据类型就有了属性和方法。 // 下面代码有什么问题? var str = 'andy'; console.log(str.length); ...
String Functions: ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER Numeric Functions: ABS ACOS ASIN AT...