Find the matching bracket's position for a bracket in a code
npm install match-bracket
Find the matching bracket's position for a bracket in a code.
npm install match-bracket
Given this code:
sample.js
``javascript
File.prototype.getExtension = function() {
var re = /[A-Za-z]*(\.[a-z]+)$/g;
var matched = re.exec(this.path);
if (matched) {
var ext = matched[1];
return ext;
} else {
return 'none';
}
};
`
We can find the matching bracket for the first { by doing:
`javascript
var matchBracket = require('match-bracket');
var code = require('fs').readFileSync('./sample.js');
var bracketPos = {line: 1, cursor: 42};
var result = matchBracket(code, bracketPos);
console.log(result);
// => {line: 11, cursor: 1}
`
Returns the position of the matching bracket of the bracket given by
bracketPos from the code.
extension is an optional argument. It allows match-bracket to recognize
comments in the code and get more accurate results.
Both bracketPos and result are in the format of:
`javascript`
{
line: // line number,
cursor: // cursor number
}
line is the line number in which the bracket appears. cursor denotes order
in which the bracket appears in the line. Most IDEs display this.
* Unmatched bracket returns results with null as properties.
`javascript`
matchBracket('({)', {line: 1, cursor: 2});
// => {line: null, cursor: null}
* In ambiguous matches, brackets closest to each other are matched.
`javascript
matchBracket('(()', {line: 1, cursor: 1});
// => {line: null, cursor: null}
matchBracket('(()', {line: 1, cursor: 2});
// => {line: 1, cursor: 3}
``
MIT