Acme.BookStore.HttpApi.Host/node_modules/nanomatch/lib/utils.js

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'use strict';

var utils = module.exports;
var path = require('path');

/**
 * Module dependencies
 */

var isWindows = require('is-windows')();
var Snapdragon = require('snapdragon');
utils.define = require('define-property');
utils.diff = require('arr-diff');
utils.extend = require('extend-shallow');
utils.pick = require('object.pick');
utils.typeOf = require('kind-of');
utils.unique = require('array-unique');

/**
 * Returns true if the given value is effectively an empty string
 */

utils.isEmptyString = function(val) {
  return String(val) === '' || String(val) === './';
};

/**
 * Returns true if the platform is windows, or `path.sep` is `\\`.
 * This is defined as a function to allow `path.sep` to be set in unit tests,
 * or by the user, if there is a reason to do so.
 * @return {Boolean}
 */

utils.isWindows = function() {
  return path.sep === '\\' || isWindows === true;
};

/**
 * Return the last element from an array
 */

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

/**
 * Get the `Snapdragon` instance to use
 */

utils.instantiate = function(ast, options) {
  var snapdragon;
  // if an instance was created by `.parse`, use that instance
  if (utils.typeOf(ast) === 'object' && ast.snapdragon) {
    snapdragon = ast.snapdragon;
  // if the user supplies an instance on options, use that instance
  } else if (utils.typeOf(options) === 'object' && options.snapdragon) {
    snapdragon = options.snapdragon;
  // create a new instance
  } else {
    snapdragon = new Snapdragon(options);