74 lines
1.6 KiB
Markdown
74 lines
1.6 KiB
Markdown
|
---
|
||
|
|
id: 587d7db4367417b2b2512b92
|
||
|
|
title: Extract Matches
|
||
|
|
challengeType: 1
|
||
|
|
forumTopicId: 301340
|
||
|
|
dashedName: extract-matches
|
||
|
|
---
|
||
|
|
|
||
|
|
# --description--
|
||
|
|
|
||
|
|
So far, you have only been checking if a pattern exists or not within a string. You can also extract the actual matches you found with the `.match()` method.
|
||
|
|
|
||
|
|
To use the `.match()` method, apply the method on a string and pass in the regex inside the parentheses.
|
||
|
|
|
||
|
|
Here's an example:
|
||
|
|
|
||
|
|
```js
|
||
|
|
"Hello, World!".match(/Hello/);
|
||
|
|
let ourStr = "Regular expressions";
|
||
|
|
let ourRegex = /expressions/;
|
||
|
|
ourStr.match(ourRegex);
|
||
|
|
```
|
||
|
|
|
||
|
|
Here the first `match` would return `["Hello"]` and the second would return `["expressions"]`.
|
||
|
|
|
||
|
|
Note that the `.match` syntax is the "opposite" of the `.test` method you have been using thus far:
|
||
|
|
|
||
|
|
```js
|
||
|
|
'string'.match(/regex/);
|
||
|
|
/regex/.test('string');
|
||
|
|
```
|
||
|
|
|
||
|
|
# --instructions--
|
||
|
|
|
||
|
|
Apply the `.match()` method to extract the string `coding`.
|
||
|
|
|
||
|
|
# --hints--
|
||
|
|
|
||
|
|
The `result` should have the string `coding`
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert(result.join() === 'coding');
|
||
|
|
```
|
||
|
|
|
||
|
|
Your regex `codingRegex` should search for the string `coding`
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert(codingRegex.source === 'coding');
|
||
|
|
```
|
||
|
|
|
||
|
|
You should use the `.match()` method.
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert(code.match(/\.match\(.*\)/));
|
||
|
|
```
|
||
|
|
|
||
|
|
# --seed--
|
||
|
|
|
||
|
|
## --seed-contents--
|
||
|
|
|
||
|
|
```js
|
||
|
|
let extractStr = "Extract the word 'coding' from this string.";
|
||
|
|
let codingRegex = /change/; // Change this line
|
||
|
|
let result = extractStr; // Change this line
|
||
|
|
```
|
||
|
|
|
||
|
|
# --solutions--
|
||
|
|
|
||
|
|
```js
|
||
|
|
let extractStr = "Extract the word 'coding' from this string.";
|
||
|
|
let codingRegex = /coding/; // Change this line
|
||
|
|
let result = extractStr.match(codingRegex); // Change this line
|
||
|
|
```
|