Skip to main content

正则表达式匹配空格\s和特定次数

 let ohStr = "Ohhh no";

let ohRegex = /Oh{3,6}\sno/ig
let result = ohRegex.test(ohStr);
{3,6}表示匹配3到6次,包含3,6.
{3, )表示最少3次,无上限
{ ,8}表示最多8次,无下限
{3}匹配特定次数,这里表示只匹配3次的。

后面跟一个?,表示这个字母可能会出现,也可能不出现。如/colou?r/既能匹配英式英语的colour,也能匹配美式英语的color

在 pwRegex 中使用前瞻来匹配长度大于 5 个字符且具有两个连续数字的密码。

let sampleWord = "astronaut";
let pwRegex = /(?=\w{6})(?=\w*\d{2})/gi
let result = pwRegex.test(sampleWord);

Comments

Popular posts from this blog

span[class~="sr-only"]

  The  span[class~="sr-only"]  selector will select any  span  element whose  class   includes   sr-only . Create that selector, and give it a  border  property set to  0 . span [ class ~= "sr-only" ] {    border:   0 ; }

Use Recursion to Create a Range of Numbers

  function   rangeOfNumbers ( startNum ,  endNum ) {    if ( startNum <= endNum )   {      const   arrNumber  =  rangeOfNumbers ( startNum ,  endNum - 1 );      arrNumber . push ( endNum );      return   arrNumber ;   }    else  {      return  [];   }       }; console . log ( rangeOfNumbers ( 6 , 8 ));//[6,7,8] console . log ( rangeOfNumbers ( 3 , 12 )); //[ 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]

About the Little Lemon receipt maker exercise

 My homework and exercise of the lesson "About the Little Lemon receipt maker exercise" of the class "programming with Javascript" on coursera. const menu = [     {         Dish : "Italian pasta" ,         price : 9.55     },     {         Dish : "Rice with veggies" ,         price : 8.65     },     {         Dish : "Chicken with potatoes" ,         price : 15.55     },     {         Dish : "Vegetarian Pizza" ,         price : 6.45     } ]; function receiptMaker ( arr , bool ) {     if ( bool == false )     {         console . log ( "Prices without tax:" );         arr . forEach ( element => {             console . log ( `Dish: ${ element . Dish } Price (incl.tax):$ ${ element . price } ` );                     });     }     else     {         console . log ( "Prices with 20% tax:" );         arr . forEach ( element => {             console . log ( `Dish: ${ element . Dish } Price (inc