<commit_before>'use strict';

// MODULES //

var isString = require( '@stdlib/utils/is-string' ).isPrimitive;


// VARIABLES //

var RE = /[-\/\\^$*+?.()|[\]{}]/g;


// MAIN //

/**
* Escapes a regular expression string.
*
* @param {string} str - regular expression string
* @throws {TypeError} first argument must be a string primitive
* @returns {string} escaped string
*
* @example
* str = rescape( '[A-Z]*' );
* // returns '\\[A\\-Z\\]\\*'
*/
function rescape( str ) {
	var len;
	var s;
	var i;

	if ( !isString( str ) ) {
		throw new TypeError( 'invalid input argument. Must provide a regular expression string. Value: `' + str + '`.' );
	}
	// Check if the string starts with a forward slash...
	if ( str[ 0 ] === '/' ) {
		// Find the last forward slash...
		len = str.length;
		for ( i = len-1; i >= 0; i-- ) {
			if ( str[ i ] === '/' ) {
				break;
			}
		}
	}
	// If we searched the string to no avail or if the first letter is not `/`, assume that the string is not of the form `/[...]/[gimy]`:
	if ( i === void 0 || i <= 0 ) {
		return str.replace( RE, '\\$&' );
	}
	// We need to de-construct the string...
	s = str.substring( 1, i );

	// Only escape the characters between the `/`:
	s = s.replace( RE, '\\$&' );

	// Reassemble:
	str = str[ 0 ] + s + str.substring( i );

	return str;
} // end FUNCTION rescape()<commit_msg>Use standalone replace function and fix example<commit_after>'use strict';

// MODULES //

var isString = require( '@stdlib/utils/is-string' ).isPrimitive;
var replace = require( '@stdlib/string/replace' );


// VARIABLES //

var RE = /[-\/\\^$*+?.()|[\]{}]/g;


// MAIN //

/**
* Escapes a regular expression string.
*
* @param {string} str - regular expression string
* @throws {TypeError} first argument must be a string primitive
* @returns {string} escaped string
*
* @example
* var str = rescape( '[A-Z]*' );
* // returns '\\[A\\-Z\\]\\*'
*/
function rescape( str ) {
	var len;
	var s;
	var i;

	if ( !isString( str ) ) {
		throw new TypeError( 'invalid input argument. Must provide a regular expression string. Value: `' + str + '`.' );
	}
	// Check if the string starts with a forward slash...
	if ( str[ 0 ] === '/' ) {
		// Find the last forward slash...
		len = str.length;
		for ( i = len-1; i >= 0; i-- ) {
			if ( str[ i ] === '/' ) {
				break;
			}
		}
	}
	// If we searched the string to no avail or if the first letter is not `/`, assume that the string is not of the form `/[...]/[gimy]`:
	if ( i === void 0 || i <= 0 ) {
		return replace( str, RE, '\\$&' );
	}
	// We need to de-construct the string...
	s = str.substring( 1, i );

	// Only escape the characters between the `/`:
	s = replace( s, RE, '\\$&' );

	// Reassemble:
	str = str[ 0 ] + s + str.substring( i );

	return str;
} // end FUNCTION rescape()
{'fraction_non_alphanumeric': 0.19956694334175387, 'fraction_numerical': 0.005052327679538073, 'mean_word_length': 2.5, 'pattern_counts': {'":': 0, '<': 5, '<?xml version=': 0, '>': 5, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '6892005', 'n_tokens_mistral': 1048, 'n_tokens_neox': 981, 'n_words': 338}