stylint/src/checks/leadingZero.js

A linter for stylus

'use strict';

var leadingZero = /( |,)(0\.)+|(^0\.)+/;

// check for leading 0
module.exports = function hasLeadingZero( line, arr ) {
	if ( typeof line !== 'string' || line.indexOf('0') === -1 ) { return; }
	var i = 0,
		len = arr.length,
		zeroFound = false;

	// remove whitespace from array
	arr = arr.filter(function( str ) {
		return str.length > 0;
	});

	// return true if leading zero found and not used as part of range
	if ( line.indexOf('0.') !== -1 && line.indexOf('0..') === -1) {
		// console.log( arr );
		for ( i; i < len; i++ ) {
			if ( leadingZero.test( arr[i] ) ) {
				zeroFound = true;
			}
		}
	}

	if ( zeroFound ) {
		return true;
	}
	else {
		return false;
	}
};