match方法 var str = "iid0000ffr"; var substr = str.match(/id(\S*)ff/); console.log(substr) 返回结果为:["id0000ff", "0000"] ()里的\S*表达式匹配所有字符串 在高级语言里,我们会用一个叫数量词的概念: (?=ff)这表示以ff结尾的前面的字符串,但不包括ff var str = "iid0000ffr"; var su
let decode_sql ="select * from table where create_user='user' order by id desc"; decode_sql.match(/^SELECT.*/gi) decode_sql.match(/^INSERT.*/gi) 以某个字符串开始 是用正则的 ^ 中间的所以字符 可以用 .* . 表示任意字符 * 表示0次到多次匹配 i 表示忽略大小写
[抄题]: Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more letter at a random position. Find the letter that was added in t. Example: Input: s = "abcd" t = &q
<!DOCTYPE html><html><head> <title></title></head><script type="text/javascript"> function search(str1,str2) { var i=j=k=a=jk=kk=0; var m=str1.length; var n=str2.length; var index=0; var maxlen=0; var st