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infinity
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Muthu Kumar 7 years ago
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  1. 495
      es5/infinity.js
  2. 2
      es5/infinity.min.js

495
es5/infinity.js
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@ -1,496 +1 @@
"use strict"; "use strict";
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
(function (f) {
if ((typeof exports === "undefined" ? "undefined" : _typeof(exports)) === "object" && typeof module !== "undefined") {
module.exports = f();
} else if (typeof define === "function" && define.amd) {
define([], f);
} else {
var g;if (typeof window !== "undefined") {
g = window;
} else if (typeof global !== "undefined") {
g = global;
} else if (typeof self !== "undefined") {
g = self;
} else {
g = this;
}g.isEq = f();
}
})(function () {
var define, module, exports;return function () {
function r(e, n, t) {
function o(i, f) {
if (!n[i]) {
if (!e[i]) {
var c = "function" == typeof require && require;if (!f && c) return c(i, !0);if (u) return u(i, !0);var a = new Error("Cannot find module '" + i + "'");throw a.code = "MODULE_NOT_FOUND", a;
}var p = n[i] = { exports: {} };e[i][0].call(p.exports, function (r) {
var n = e[i][1][r];return o(n || r);
}, p, p.exports, r, e, n, t);
}return n[i].exports;
}for (var u = "function" == typeof require && require, i = 0; i < t.length; i++) {
o(t[i]);
}return o;
}return r;
}()({ 1: [function (require, module, exports) {
/**
* ∞
* Infinity: Create infinitely generating lists in JavaScript.
* @version 0.2.0
* @author Muthu Kumar (MKRhere)
*/
// Utils
var _require = require('./utils'),
always = _require.always,
isNonZeroFalsy = _require.isNonZeroFalsy,
stringify = _require.stringify,
areNumbers = _require.areNumbers;
/**
* An item of the InfiniteList class. Created when calling .get(n) on an InfiniteList.
* Exposed for instanceof utility sake. Not to be called directly.
* @class InfiniteListItem
*/
var InfiniteListItem = function () {
/**
* Creates an instance of InfiniteListItem.
* @param {*} list Parent list, instance of InfiniteList
* @param {Number} value Current value
* @param {Number} index Current index
* @memberof InfiniteListItem
*/
function InfiniteListItem(list, value, index) {
_classCallCheck(this, InfiniteListItem);
this.value = value;
this.index = index;
this.next = function (z) {
return !z ? list.get(index + 1) : list.get(index + z);
};
this.previous = function (z) {
return !z ? list.get(index - 1) : list.get(index - z);
};
// Check if Symbol exists
if (typeof Symbol !== 'undefined' && Symbol.iterator) {
/**
* ES6 Symbol.iterator
* @returns {Iterable.<InfiniteListItem>}
*/
this[Symbol.iterator] = function () {
return {
next: function next() {
return {
value: list.get(index + 1),
done: false
};
}
};
};
}
}
/**
* toString method for pretty printing InfiniteListItem instance.
* @returns {String} Decycled and beautified string
* @memberof InfiniteListItem
*/
_createClass(InfiniteListItem, [{
key: "toString",
value: function toString() {
return 'InfiniteListItem [ .. ' + stringify(this.value) + ' .. ]';
}
}]);
return InfiniteListItem;
}();
var InfiniteList =
/**
* InfiniteList Constructor.
* Iterates infinitely until index value is found.
* Stores cache in closure so when the same index is requested again,
* it's returned immediately.
* @param {*} start Starting value
* @param {Function} next Function to find next item
* Accepts current value and optionally previous value
* @memberof InfiniteList
* @constructs InfiniteList
*/
function InfiniteList(start, next) {
_classCallCheck(this, InfiniteList);
// Closure magic!
var cache = [];
var j = 0;
/**
* Get InfiniteListItem at index.
* @param {Number} index A non-negative integer representing index
* @returns {InfiniteListItem}
* @memberof InfiniteList
*/
this.get = function (index) {
// Validation
if (
// i is a non-zero falsy value, or is negative
isNonZeroFalsy(index) || index < 0 || !areNumbers(index)) return;
//TODO: Cache limiting. (Removed for unexpected behaviour)
// Initializing first item if it doesn't exist
if (!cache[0]) cache[0] = start;
// If index were to be infinity, value and index are infinity
if (index === Infinity) return new InfiniteListItem(this, Infinity, Infinity);
// If index exists in cache, return the value
if (index in cache) return new InfiniteListItem(this, cache[index], index);
// If i doesn't exist in cache
if (!(index in cache)) {
if (cache.length <= index && cache.length - 1 in cache) while (cache.length <= index) {
cache[cache.length] = next(cache[cache.length - 1], cache[cache.length - 2]);
}
}
return new InfiniteListItem(this, cache[index], index);
};
/**
* Clear cache manually.
* Forces destroy reference to cache, and creates a new cache.
* Old cache will be GC'd.
* @returns {undefined}
* @memberof InfiniteList
*/
this.clearCache = function () {
return cache = [], undefined;
};
// Check if Symbol exists
if (typeof Symbol !== 'undefined' && Symbol.iterator) {
/**
* ES6 Symbol.iterator
* @returns {Iterable.<InfiniteListItem>}
* @memberof InfiniteList
*/
this[Symbol.iterator] = function () {
var _this = this;
return {
next: function next() {
return {
value: _this.get(j++),
done: false
};
}
};
};
}
if (typeof Proxy !== 'undefined') return new Proxy(this, {
get: function get(obj, key) {
if (key in obj) return obj[key];
var index = typeof key === 'string' && /^\d*$/g.test(key) ? parseInt(key) : undefined;
if (index) return obj['get'](index);
},
has: function has(obj, key) {
var index = typeof key === 'string' && /^\d*$/g.test(key) ? parseInt(key) : undefined;
return key in obj || areNumbers(index) && index % 1 === 0 && index >= 0;
},
enumerate: function enumerate(obj) {
return obj.keys();
},
ownKeys: function ownKeys(obj) {
return obj.keys();
}
});
};
/**
* Takes a given number of elements from the InfiniteList.
* @param {Number} from Number of elements or starting index
* @param {Number} to Optional ending index
* @returns {Array<InfiniteListItem>} An array of InfiniteListItems
* @memberof InfiniteList
*/
InfiniteList.prototype.take = function (from, to) {
var arr = [];
if (isNonZeroFalsy(from) || from === 0 && isNonZeroFalsy(to) // Take 0 elements?
|| !areNumbers(from) && isNonZeroFalsy(to)) return arr;
var source = void 0,
target = void 0;
if (isNonZeroFalsy(to)) {
// "from" number of elements
source = 0;
target = from;
} else {
// "target" is the end index!
source = from;
target = to + 1;
};
for (var i = source; i < target; i++) {
arr.push(this.get(i));
}
return arr;
};
/**
* Returns first element of InfiniteList.
* @returns {InfiniteListItem} Instance of InfiniteListItem
* @memberof InfiniteList
*/
InfiniteList.prototype.top = function () {
return this.get(0);
};
/**
* Returns last element of InfiniteList (Infinity).
* @returns {InfiniteListItem} Instance of InfiniteListItem
* @memberof InfiniteList
*/
InfiniteList.prototype.end = function () {
return this.get(Infinity);
};
/**
* toString method for pretty printing InfiniteList instance.
* Snips at 2 elements for arrays and objects, or 5 elements otherwise.
* @returns {String} Pretty printed InfiniteList
* @memberof InfiniteList
*/
InfiniteList.prototype.toString = function () {
var length = _typeof(this.first()) === 'object' ? 2 : 5;
return ['InfiniteList [', this.take(length).map(function (x) {
return ' ' + stringify(x.value);
}) + ',', '... ]'].join(' ');
};
/* Convenience methods */
InfiniteList.prototype.first = InfiniteList.prototype.top;
InfiniteList.prototype.last = InfiniteList.prototype.end;
// Exports
module.exports = InfiniteList;
module.exports.InfiniteListItem = InfiniteListItem;
}, { "./utils": 3 }], 2: [function (require, module, exports) {
/*
cycle.js
2018-05-15
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
This code should be minified before deployment.
See http://javascript.crockford.com/jsmin.html
USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
NOT CONTROL.
*/
// The file uses the WeakMap feature of ES6.
/*jslint eval */
/*property
$ref, decycle, forEach, get, indexOf, isArray, keys, length, push,
retrocycle, set, stringify, test
*/
if (typeof JSON.decycle !== "function") {
JSON.decycle = function decycle(object, replacer) {
"use strict";
// Make a deep copy of an object or array, assuring that there is at most
// one instance of each object or array in the resulting structure. The
// duplicate references (which might be forming cycles) are replaced with
// an object of the form
// {"$ref": PATH}
// where the PATH is a JSONPath string that locates the first occurance.
// So,
// var a = [];
// a[0] = a;
// return JSON.stringify(JSON.decycle(a));
// produces the string '[{"$ref":"$"}]'.
// If a replacer function is provided, then it will be called for each value.
// A replacer function receives a value and returns a replacement value.
// JSONPath is used to locate the unique object. $ indicates the top level of
// the object or array. [NUMBER] or [STRING] indicates a child element or
// property.
var objects = new WeakMap(); // object to path mappings
return function derez(value, path) {
// The derez function recurses through the object, producing the deep copy.
var old_path; // The path of an earlier occurance of value
var nu; // The new object or array
// If a replacer function was provided, then call it to get a replacement value.
if (replacer !== undefined) {
value = replacer(value);
}
// typeof null === "object", so go on if this value is really an object but not
// one of the weird builtin objects.
if ((typeof value === "undefined" ? "undefined" : _typeof(value)) === "object" && value !== null && !(value instanceof Boolean) && !(value instanceof Date) && !(value instanceof Number) && !(value instanceof RegExp) && !(value instanceof String)) {
// If the value is an object or array, look to see if we have already
// encountered it. If so, return a {"$ref":PATH} object. This uses an
// ES6 WeakMap.
old_path = objects.get(value);
if (old_path !== undefined) {
return {
$ref: old_path
};
}
// Otherwise, accumulate the unique value and its path.
objects.set(value, path);
// If it is an array, replicate the array.
if (Array.isArray(value)) {
nu = [];
value.forEach(function (element, i) {
nu[i] = derez(element, path + "[" + i + "]");
});
} else {
// If it is an object, replicate the object.
nu = {};
Object.keys(value).forEach(function (name) {
nu[name] = derez(value[name], path + "[" + JSON.stringify(name) + "]");
});
}
return nu;
}
return value;
}(object, "$");
};
}
if (typeof JSON.retrocycle !== "function") {
JSON.retrocycle = function retrocycle($) {
"use strict";
// Restore an object that was reduced by decycle. Members whose values are
// objects of the form
// {$ref: PATH}
// are replaced with references to the value found by the PATH. This will
// restore cycles. The object will be mutated.
// The eval function is used to locate the values described by a PATH. The
// root object is kept in a $ variable. A regular expression is used to
// assure that the PATH is extremely well formed. The regexp contains nested
// * quantifiers. That has been known to have extremely bad performance
// problems on some browsers for very long strings. A PATH is expected to be
// reasonably short. A PATH is allowed to belong to a very restricted subset of
// Goessner's JSONPath.
// So,
// var s = '[{"$ref":"$"}]';
// return JSON.retrocycle(JSON.parse(s));
// produces an array containing a single element which is the array itself.
var px = /^\$(?:\[(?:\d+|"(?:[^\\"\u0000-\u001f]|\\(?:[\\"\/bfnrt]|u[0-9a-zA-Z]{4}))*")\])*$/;
(function rez(value) {
// The rez function walks recursively through the object looking for $ref
// properties. When it finds one that has a value that is a path, then it
// replaces the $ref object with a reference to the value that is found by
// the path.
if (value && (typeof value === "undefined" ? "undefined" : _typeof(value)) === "object") {
if (Array.isArray(value)) {
value.forEach(function (element, i) {
if ((typeof element === "undefined" ? "undefined" : _typeof(element)) === "object" && element !== null) {
var path = element.$ref;
if (typeof path === "string" && px.test(path)) {
value[i] = eval(path);
} else {
rez(element);
}
}
});
} else {
Object.keys(value).forEach(function (name) {
var item = value[name];
if ((typeof item === "undefined" ? "undefined" : _typeof(item)) === "object" && item !== null) {
var path = item.$ref;
if (typeof path === "string" && px.test(path)) {
value[name] = eval(path);
} else {
rez(item);
}
}
});
}
}
})($);
return $;
};
}
module.exports = JSON;
}, {}], 3: [function (require, module, exports) {
'use strict';
var JSON = require('./cycle');
var always = function always(x) {
return function (_) {
return x;
};
};
var isNonZeroFalsy = function isNonZeroFalsy(_) {
return Boolean(_) === false && _ !== 0;
};
var stringify = function stringify(_) {
return (typeof _ === "undefined" ? "undefined" : _typeof(_)) === 'object' && _ !== null ? JSON.stringify(JSON.decycle(_), null, 2) : _.toString();
};
var areNumbers = function areNumbers() {
for (var _len = arguments.length, items = Array(_len), _key = 0; _key < _len; _key++) {
items[_key] = arguments[_key];
}
return items.every(function (x) {
return typeof x === 'number' && x !== NaN;
});
};
module.exports = {
always: always,
isNonZeroFalsy: isNonZeroFalsy,
stringify: stringify,
areNumbers: areNumbers
};
}, { "./cycle": 2 }] }, {}, [1])(1);
});

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