text = text.replace(/\s/g, "").toUpperCase(); // Now loop through the characters of the text for(let character of text) { let count = this.letterCounts.get(character); // Get old count this.letterCounts.set(character, count+1); // Increment it this.totalLetters++; } } // Conv...
log(String.replace(num, /5/, '2')); 移除字符串泛型的措施,参见 Warning: String.x is deprecated; use String.prototype.x instead. Generics在Javascript 1.6 中同样支持Array。 String 实例 属性 String.prototype.constructor用于创造对象的原型对象的特定的函数。 String.prototype.length返回了字符串的长度...
// JavaScript's most important datatype is the object.// An object is a collection of name/value pairs, or a string to value map.letbook = {// Objects are enclosed in curly braces.topic:"JavaScript",// The property "topic" has value "JavaScript."edition:7// The property "edition" ...
以下是初始代码的可运行版本(我稍微修改了输入字符串): String.prototype.toSentenceCase = function() { var i, j, str, lowers, uppers; str = this.replace(/(^\w{1}|\.\s*\w{1})/gi, function(txt) { return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase(); }); // Certa...
// 一个表示在一行上写的 2 行的字符串: 'two\nlines' "one\ long\ line" // 两行字符串分别写在两行上: `the newline character at the end of this line is included literally in this string` 请注意,当使用单引号界定字符串时,必须小心处理英语缩写和所有格,例如 can’t 和O’Reilly’s。由...
Thereplace()method searches a string for a value or a regular expression. Thereplace()method returns a new string with the value(s) replaced. Thereplace()method does not change the original string. Note If you replace a value, only the first instance will be replaced. To replace all insta...
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...
Using property access [] like in arrays JavaScript String charAt() ThecharAt()method returns the character at a specified index (position) in a string: Example lettext ="HELLO WORLD"; letchar= text.charAt(0); Try it Yourself »
Replace random chars in a string in javascript Use eval to do dynamic string replace Replace multiple strings with multiple other strings Use Regular expression to replace quotation mark Replace last index of , with and in jQuery /JavaScript Replace space character with slash surrounded by spaces "...
Convert a string to hex Convert to Char Array Split the string into an array of characters Convert to ASCII Convert each character to its ASCII code Convert to Hex Convert ASCII codes to hexadecimal representation Join to String Combine all hexadecimal values into a single string ...