StringBuffer insert(int index,char ch) StringBuffer insert(int index,Object obj) index指定将字符串插入到StringBuffer对象中的位置的下标。 (8)、reverse() 颠倒StringBuffer对象中的字符 StringBuffer reverse() (9)、delete()和deleteCharAt() 删除字符 StringBuffer delete(int startIndex,int endIndex) Stri...
常用JavaScript字符串方法简述 网址来源:http://www.html-js.com/article/JS-rookie-in-the-rookie-to-start-learning-to-fly-the-commonly-used-string-method-in-JavaScript indexOf(str)返回字符串中参数字符串第一次出现的位置(从左到右搜索,并且下表从0开始)。如果没有匹配项,返回-1 enter code herevarst...
if(string.substring(i, i + oldChars.length) == oldChars) { string = string.substring(0, i) + newChars + string.substring(i + oldChars.length, string.length); } }returnstring; }conststring ="Java Tutorials";letnewString = replaceString("Java","JavaScript", string);console.log(newStr...
Thesubstring()method does not change the original string. If start is greater than end, arguments are swapped: (4, 1) = (1, 4). Start or end values less than 0, are treated as 0. See Also: The split() Method The slice() Method ...
JavaScript String Methods MethodDescription charAt() Returns the character at the specified index. concat() Joins two or more strings. replace() Replace a string with another string. split() Converts the string to an array of strings. substr() Returns a part of a string by taking the starti...
What is the substring() method in JavaScript? substring()method is one of the inbuilt methods of the JavaScript String which is basically used to return the part of the String on the basis of providedstartandendindex and results in a new String. ...
There are 3 methods for extracting a part of a string: slice(start,end) substring(start,end) substr(start,length) JavaScript String slice() slice()extracts a part of a string and returns the extracted part in a new string. The method takes 2 parameters: start position, and end position ...
String LengthThe length property returns the length of a string:Example var txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";var sln = txt.length; Try it Yourself » Finding a String in a StringThe indexOf() method returns the index of (the position of) the first occurrence of a specified text in ...
1.String对象的属性 String对象最常用的属性是length,该属性用于返回String对象的长度。length属性的语法格式如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 string.length 返回值是一个只读的整数,他代表指定字符串的长度,每个汉字按一个字符计算。 2.String对象的方法 方法 描述 abchor(name) 为字符串...
基本类型【number、string、boolean】 javaScript是弱类型语言,在运行的时候才知道具体的类型是什么。所有类型都用var来修饰。 特殊类型【null、undefined】 当定义了变量,没有任何赋值的时候,该变量就是undefined类型 复合类型【数组、对象、函数】 javaScript对象的类型 ...