16. 将字符串转换为字符数组: conststringToArray=string=>Array.from(string); Array.from() 方法将可迭代对象(例如字符串)转换为数组。 17. 生成指定范围内的数字数组: constrangeArray=(start,end)=>Array.from({length:end-start+1},(_,i)=>start+i); 使用Array.from() 方法和箭头函数,我们可以生成...
15-在结尾处截断字符串 需要从头开始截断字符串,这不是问题! const truncateString = (string, length) => {return string.length < length ? string : `${string.slice(0, length - 3)}...`;};console.log(truncateString('Hi, I should be truncated because I am too loooong!', 36),);// Hi,...
toString() 或 String() Number() 使⽤Number()函数来对string进⾏强制类型转换是最直接的做法。不过,这种做法有⼀个局限性:如果字符串截去开头和结尾的空⽩字符 后,不是纯数字字符串,那么最终返回结果为NaN。⽤Number()函数来进⾏string-to-number转换时,函数只接受10进制字符串,但测试结果表明事实并...
truncateString 函数将给定的字符串截断为指定的最大长度,并在必要时附加省略号。 functiontruncateString(str, maxLength){if(str.length <= maxLength) {returnstr;} returnstr.slice(0, maxLength) +'...';} truncateString 函数检查字符串的长度是否小于或...
consttruncateString=(string,length)=>{returnstring.length<length?string:`${string.slice(0,length-3)}...`;};console.log(truncateString('Hi, I should be truncated because I am too loooong!',36),);// Hi, I should be truncated because... ...
const randomString = () => Math.random().toString(36).slice(2);randomString(); 1. 4. 截断字符串 该方法可以从指定长度处截断字符串: const truncateString = (string, length) => string.length < length ? string : `${string.slice(0, length - 3)}...`;truncateString('Hi, I should be...
Maybe you needtemporary unique ID, this is a trick, you can use it to generate random strings on the go. const randomString = () => Math.random().toString(36).slice(2); console.log(randomString()); // could be anything!!!
return`${string.slice(0, start)}...${string.slice(string.length - end)}`; }; console.log( truncateStringMiddle( 'A long story goes here but then eventually ends!',// string 25,// 需要的字符串大小 13,// 从原始字符串第几位开始截取 ...
var numString = number toString();if (numString lastIndexOf(" ") == ) {// If there is no decimal point numString += " ";// give it one at the end } var cutoff = numString lastIndexOf(" ") + decimals;// The point at which to truncate the number var d = ...
实现效果： .html： this-file-has-a-really-really-really-long-filename. pdf <...