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js function implementation method to determine the largest substring of two strings

高洛峰
Release： 2016-12-08 13:08:03
Original
1238 people have browsed it

As shown below: 

<!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 str="";
var flag=0;
for (i=0;i<n;i++)
{
k=i;
for (j=0;j<m;j++)
{
a = 0;
flag = 0;
jk=j;
kk=k;
while(jk<=m&&str1[kk]==str2[jk])
{
kk++;jk++;a++;
flag = 1;
}
if(flag==1)
{
if(a>maxlen)
{
maxlen = a;
index = jk-a;//匹配的首项
}
}
}
 
}
for(;maxlen>0;maxlen--)
{
str+=str2[index++];
 
}
return str;
}
alert(search("kssd","ssdfa"));
</script>
<body>
<div>11</div>
</body>
</html>
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