Method One: indexOf () (recommended)
STR = var "123";
the console.log (str.indexOf ( ". 3") = -1!); // to true
the indexOf () method returns a string value of the specified position of the first occurrence of the string. If the string value to be retrieved is not present, then the method returns -1.
Method two: search ()
STR = var "123";
the console.log (str.search ( ". 3") = -1!); // to true
Search () method is used substring search character string specified in the regular expression or retrieve sub-string matches. If no matches any substring, or -1.
Method three: match ()
STR = var "123";
var REG = the RegExp (/. 3 /);
IF {((REG) str.match)
// contains
}
specified value match () method within the string may be retrieved, or to find one or more regular expression matching.
Method four: test ()
STR = var "123";
var REG = the RegExp (/. 3 /);
// to true; the console.log (reg.test (STR))
values specified search character string test () method is used. Returns true or false.
Method five: exec ()
STR = var "123";
var REG = the RegExp (/. 3 /);
IF (reg.exec (STR)) {
// comprising
}
Exec () method is used to retrieve the string matching the regular expression. It returns an array in which to store the matching results. If a match is not found, the return value is null.
Reproduced original: www .cnblogs.com / ooo0 / p /7741651.html
Method One: indexOf () (recommended)
STR = var "123";
the console.log (str.indexOf ( ". 3") = -1!); // to true
the indexOf () method returns a string value of the specified position of the first occurrence of the string. If the string value to be retrieved is not present, then the method returns -1.
Method two: search ()
STR = var "123";
the console.log (str.search ( ". 3") = -1!); // to true
Search () method is used substring search character string specified in the regular expression or retrieve sub-string matches. If no matches any substring, or -1.
Method three: match ()
STR = var "123";
var REG = the RegExp (/. 3 /);
IF {((REG) str.match)
// contains
}
specified value match () method within the string may be retrieved, or to find one or more regular expression matching.
Method four: test ()
STR = var "123";
var REG = the RegExp (/. 3 /);
// to true; the console.log (reg.test (STR))
values specified search character string test () method is used. Returns true or false.
Method five: exec ()
STR = var "123";
var REG = the RegExp (/. 3 /);
IF (reg.exec (STR)) {
// comprising
}
Exec () method is used to retrieve the string matching the regular expression. It returns an array in which to store the matching results. If a match is not found, the return value is null.
Reproduced original: www .cnblogs.com / ooo0 / p /7741651.html