browserify-hmr/lib/str-set.js

Hot Module Replacement plugin for Browserify

'use strict';

var has = require('./has');

function StrSet(other) {
  this._map = {};
  this._size = 0;
  if (other) {
    for (var i=0,len=other.length; i<len; i++) {
      this.add(other[i]);
    }
  }
}
StrSet.prototype.add = function(value) {
  if (!this.has(value)) {
    this._map[value] = true;
    this._size++;
  }
};
StrSet.prototype.has = function(value) {
  return has(this._map, value);
};
StrSet.prototype.del = function(value) {
  if (this.has(value)) {
    delete this._map[value];
    this._size--;
  }
};
StrSet.prototype.size = function() {
  return this._size;
};
StrSet.prototype.forEach = function(cb) {
  for (var value in this._map) {
    if (has(this._map, value)) {
      cb(value);
    }
  }
};
StrSet.prototype.some = function(cb) {
  for (var value in this._map) {
    if (has(this._map, value)) {
      if (cb(value)) {
        return true;
      }
    }
  }
  return false;
};
StrSet.prototype.every = function(cb) {
  return !this.some(function(x) {
    return !cb(x);
  });
};
StrSet.prototype.hasIntersection = function(otherStrSet) {
  var value;
  if (this._size < otherStrSet._size) {
    return this.some(function(value) {
      return otherStrSet.has(value);
    });
  } else {
    var self = this;
    return otherStrSet.some(function(value) {
      return self.has(value);
    });
  }
};
StrSet.prototype.toArray = function() {
  var arr = [];
  this.forEach(function(value) {
    arr.push(value);
  });
  return arr;
};

module.exports = StrSet;