打字稿 | String charCodeAt() 方法
charCodeAt()是TypeScript中的一个内置函数,用于返回表示指定索引处字符的 Unicode 值的数字。
句法:
string.charCodeAt(index);
参数:此方法接受如上所述和下文所述的单个参数。
- index该参数是一个小于字符串长度的 0 到 1 之间的整数。
返回值:此方法返回数字,指示给定索引处字符的 Unicode 值。
下面的例子说明了 TypeScriptJS 中的字符串 charCodeAt()方法:
示例 1:
JavaScript
var str = new String("JavaScript is object oriented language");
// Finding number indicating the Unicode value
// of the character at the given index
var value = str.charCodeAt(14);
console.log(value);
JavaScript
var str = new String('JavaScript is object oriented language');
// Finding number indicating the Unicode value
// of the character at the given index
console.log("Character at 0 is : " + str.charCodeAt(0));
console.log("Character at 1 is : " + str.charCodeAt(1));
输出:
111
示例 2:
JavaScript
var str = new String('JavaScript is object oriented language');
// Finding number indicating the Unicode value
// of the character at the given index
console.log("Character at 0 is : " + str.charCodeAt(0));
console.log("Character at 1 is : " + str.charCodeAt(1));
输出:
Character at 0 is : 74
Character at 1 is : 97