character sets
to specify a group of characters to match, but that's a lot of typing when you need to match a large range of characters (for example, every letter in the alphabet). Fortunately, there is a built-in feature that makes this short and simple.
Inside a character set
, you can define a range of characters to match using a hyphen
character: -
.
For example, to match lowercase letters a
through e
you would use [a-e]
.
let catStr = "cat";
let batStr = "bat";
let matStr = "mat";
let bgRegex = /[a-e]at/;
catStr.match(bgRegex); // Returns ["cat"]
batStr.match(bgRegex); // Returns ["bat"]
matStr.match(bgRegex); // Returns null
quoteSample
.
NotealphabetRegex
should match 35 items.
testString: assert(result.length == 35, 'Your regex alphabetRegex
should match 35 items.');
- text: Your regex alphabetRegex
should use the global flag.
testString: assert(alphabetRegex.flags.match(/g/).length == 1, 'Your regex alphabetRegex
should use the global flag.');
- text: Your regex alphabetRegex
should use the case insensitive flag.
testString: assert(alphabetRegex.flags.match(/i/).length == 1, 'Your regex alphabetRegex
should use the case insensitive flag.');
```