Use the String.split() method to split a string by newline, e.g. str.split(/\r?\n/). The split method will split the string on each occurrence of a newline character and will return an array containing the results. index.js const str = 'bobby\nhadz\r\ncom'; const result = st...
The splitMultiple function takes a string and an array of separators as parameters and splits the string into an array on each occurrence of a separator. We used the same approach in the function: Replace all occurrences of the separators with a unified character (a dollar sign). Split the...
let primes = [2, 3, 5, 7]; // An array of 4 values, delimited with [ and ]. primes[0] // => 2: the first element (index 0) of the array. primes.length // => 4: how many elements in the array. primes[primes.length-1] // => 7: the last element of the array. prim...
// The split function creates a new array containing each value separated by a space stringArray = concatString.split(" "); for (var i=0; i<stringArray.length;i++) { alert(stringArray[i]; } alert(newString.toUpperCase()); alert(newString.toLowerCase()); } 下面是执行上面的代码得到...
split() Break a string into an array of substrings. Example 1: Regular Expressions const string = 'Find me'; const pattern = /me/; // search if the pattern is in string variable const result1 = string.search(pattern); console.log(result1); // 5 // replace the character with anothe...
_transform(chunk, encoding, callback) { if (typeof chunk !== "string") { callback(new Error("Expected a string but got a buffer")); return; } // Add the chunk to any previously incomplete line and break // everything into lines let lines = (this.incompleteLine + chunk).split("...
how many elements in the array.primes[primes.length-1]// => 7: the last element of the array.primes[4] =9;// Add a new element by assignment.primes[4] =11;// Or alter an existing element by assignment.letempty = [];// [] is an empty array with no elements.empty.length// ...
像Date()、RegExp()、String()、Object()和Array()(§3.9.2)这样的构造函数 像Math 和 JSON(§6.8)这样的全局对象 全局对象的初始属性不是保留字,但应当视为保留字。本章已经描述了一些这些全局属性。其他大部分属性将在本书的其他地方介绍。 在Node 中,全局对象有一个名为global的属性,其值是全局对象本身...
String.match(); String.split(); search()的参数是一个正则表达式。如果在参数位置传递的不是正则表达式,会先将该参数传递给正则表达式的构造函数RegExp(),将其转换成正则表达式。 "JavaScript".search(/script/i); search()忽略g标志。不会进行全局查找,它的返回值是匹配字符的起始位置。如果没有找到匹配值,则...
passed, as Uint8Array* objects, to this processChunk callback.** streamBody() returns a Promise that resolves to a string. If a processChunk* callback was supplied then this string is the concatenation of the values* returned by that callback. Otherwise the string is the concatenation of*...