HTML and CSS Reference
In-Depth Information
EXAMPLE
17.2 (
CONTINUED
)
2
var regex = new RegExp("love");
//
Creating a regular
//
expression object
3
if ( regex.test(myString)){
4
alert("Found pattern love!");
}
else{
5
alert("No match.");
}
</script>
</head>
<body></body>
</html>
EXPLANATION
1
The variable called
myString
is assigned
“My gloves are worn for wear.”
2
The
RegExp()
constructor creates a new regular expression object, called
regex
.
This is the constructor way of creating a regular expression object. It is assigned
the string
“love”
, the regular expression.
3
The
test()
method for the regular expression object tests to see if
myString
con-
tains the pattern,
love
. If it finds
love
within
gloves
, it will return
true
.
4, 5
The alert dialog box will display
Found pattern!
if the
test()
method returned
true
,
or
No match.
if it returns
false
. See Figure 17.3.
Figure 17.3
My gloves are worn for wear.”
contains the pattern
love
.
The
exec()
Method.
The
exec()
method executes a search to find a match for a spec-
ified pattern in a string. If it doesn't find a match,
exec()
returns null; otherwise it returns
an array containing the string that matched the regular expression.
FORMAT
array = regular_expression.exec(string);
EXAMPLE
list = /ring/.exec("Don't string me along, just bring me the goods.");
