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'use strict';

/**
 * Module dependencies
 */

exports.extend = require('extend-shallow');
exports.SourceMap = require('source-map');
exports.sourceMapResolve = require('source-map-resolve');

/**
 * Convert backslash in the given string to forward slashes
 */

exports.unixify = function(fp) {
  return fp.split(/\\+/).join('/');
};

/**
 * Return true if `val` is a non-empty string
 *
 * @param {String} `str`
 * @return {Boolean}
 */

exports.isString = function(str) {
  return str && typeof str === 'string';
};

/**
 * Cast `val` to an array
 * @return {Array}
 */

exports.arrayify = function(val) {
  if (typeof val === 'string') return [val];
  return val ? (Array.isArray(val) ? val : [val]) : [];
};

/**
 * Get the last `n` element from the given `array`
 * @param {Array} `array`
 * @return {*}
 */

exports.last = function(arr, n) {
  return arr[arr.length - (n || 1)];
};