We look at the defaultArray.prototype.sortbehavior and discuss how you can do case insensitive string sorting. const foo =['Alpha','beta','Gamma','delta']; foo.sort((a, b)=>a.toLowerCase().localeCompare(b.toLowerCase())); foo.forEach(x=>console.log(x));/*"Alpha" "beta" "del...
Use thelocaleCompare()String Method to Do Case Insensitive Comparison in JavaScript While the method above gives an easy answer, it may not work well where the strings include Unicode characters. ThelocaleComparestring method can take care of this. It is used with thesensitivity: 'base'option ...
如果要对字符串数组进行排序，忽略大小写，函数特别有用：const strings = ['Alpha', 'Zeta', 'alpha', 'zeta'];strings.sort((str1, str2) => str1.localeCompare(str2, undefined, { sensitivity: 'accent' }));// Case insensitive sorting: ['Alpha', 'alpha', 'Zeta', 'zeta']strings;不使用...
g:表示全局(global)模式,即模式将被应用于所有字符串,而非在发现第一个匹配项时立即停止 i:表示不区分大小写(case-insensitive)模式,即在确定匹配项时忽略模式与字符串的大小写 m:表示多行(multiline)模式,即在到达一行文本末尾时还会继续查找下一行中是否存在与模式匹配的项 //匹配字符串所有'at'的实例varp =...
Method 1: Case Insensitive String Comparison Using LocaleCompare() Method The case-insensitive comparison of strings uses the “localeCompare()” method. This method returns a number (positive, negative, or zero). The strings are compared in a sorting order, if the reference string is longer than...
i:表示不区分大小写(case-insensitive)模式,即在确定匹配项时忽略模式与字符串的大小写; m:表示多行(multiline)模式,即在到达一行文本末尾时还会继续查找下一行是否存在于模式匹配项 正则表达式 = 1个模式+ 3个标志 (任意),不同的组合产生不同结果
const str = 'arya stark';// The most concise way to check substrings ignoring case is using// `String#match()` and a case-insensitive regular expression (the 'i')str.match(/Stark/i); // truestr.match(/Snow/i); // false// You can also convert both the string and the search ...
"string"——如果这个值是字符串; "number"——如果这个值是数值; "object"——如果这个值是对象或 null; "function"——如果这个值是函数。 调用typeof null 会返回"object",因为特殊值 null 被认为是一个空的对象引用。 从技术角度讲,函数在 ECMAScript 中是对象,不是一种数据类型。然而,函数也确实有一些...
To check for case insensitive string contains, use the regular expressions. Add suffix “i” after the string regular expression as shown. var actualstring = "Javascript Regular Exp"; var regexp = "javascript"; /regexp/i.test(actualstring); //returns true ...
conststr="Hello, World!";constsearchValue="world";if(str.toLowerCase().includes(searchValue.toLowerCase())){console.log(`${searchValue}is found (case-insensitive).`);} 2. 从指定位置开始查找:虽然includes()本身不支持从指定索引开始查找,但可以通过截取子字符串实现类似效果。