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...
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 ...
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 ...
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...
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 ...
String.method('charAt', function(pos){ return this.slice(pos, pos+1); }) string.charCodeAt(pos) charCodeAt方法同charAt一样,只不过它返回的不是一个字符串,而是以整数形式表示的在string中的pos位置处的字符的字符码位。如果pos小于0或大于等于字符串长度,它返回NaN: ...
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...
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 复制 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 下面对常用的方法进行详细介绍: ...
const string = "Hello world" const check1 = string.endsWith("worl") // false const check2 = string.endsWith("worl", string.length - 1) // true In the second check, using the specified length argument is string.length - 1. This means the endsWith method starts checking from the "...
在Function原型上添加method,其所有方法上都可用method 代码语言:javascript 复制 /* 取整*/Number.method('integer',function(){returnMath[this<0?'ceil':'floor'](this);});/* 移除字符串首尾空白*/String.method('trim',function(){returnthis.replace(/^\s+|\s+$/g,'');}); ...