mathjs
Version:
Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif
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JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.createConstantNode = void 0;
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));
var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));
var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _string = require("../../utils/string.js");
var _is = require("../../utils/is.js");
var _latex = require("../../utils/latex.js");
var _factory = require("../../utils/factory.js");
function _callSuper(t, o, e) { return o = (0, _getPrototypeOf2["default"])(o), (0, _possibleConstructorReturn2["default"])(t, _isNativeReflectConstruct() ? Reflect.construct(o, e || [], (0, _getPrototypeOf2["default"])(t).constructor) : o.apply(t, e)); }
function _isNativeReflectConstruct() { try { var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); } catch (t) {} return (_isNativeReflectConstruct = function _isNativeReflectConstruct() { return !!t; })(); }
var name = 'ConstantNode';
var dependencies = ['Node'];
var createConstantNode = exports.createConstantNode = /* #__PURE__ */(0, _factory.factory)(name, dependencies, function (_ref) {
var Node = _ref.Node;
var ConstantNode = /*#__PURE__*/function (_Node) {
(0, _inherits2["default"])(ConstantNode, _Node);
/**
* A ConstantNode holds a constant value like a number or string.
*
* Usage:
*
* new ConstantNode(2.3)
* new ConstantNode('hello')
*
* @param {*} value Value can be any type (number, BigNumber, string, ...)
* @constructor ConstantNode
* @extends {Node}
*/
function ConstantNode(value) {
var _this;
(0, _classCallCheck2["default"])(this, ConstantNode);
_this = _callSuper(this, ConstantNode);
_this.value = value;
return _this;
}
(0, _createClass2["default"])(ConstantNode, [{
key: "type",
get: function get() {
return name;
}
}, {
key: "isConstantNode",
get: function get() {
return true;
}
/**
* Compile a node into a JavaScript function.
* This basically pre-calculates as much as possible and only leaves open
* calculations which depend on a dynamic scope with variables.
* @param {Object} math Math.js namespace with functions and constants.
* @param {Object} argNames An object with argument names as key and `true`
* as value. Used in the SymbolNode to optimize
* for arguments from user assigned functions
* (see FunctionAssignmentNode) or special symbols
* like `end` (see IndexNode).
* @return {function} Returns a function which can be called like:
* evalNode(scope: Object, args: Object, context: *)
*/
}, {
key: "_compile",
value: function _compile(math, argNames) {
var value = this.value;
return function evalConstantNode() {
return value;
};
}
/**
* Execute a callback for each of the child nodes of this node
* @param {function(child: Node, path: string, parent: Node)} callback
*/
}, {
key: "forEach",
value: function forEach(callback) {
// nothing to do, we don't have any children
}
/**
* Create a new ConstantNode with children produced by the given callback.
* Trivial because there are no children.
* @param {function(child: Node, path: string, parent: Node) : Node} callback
* @returns {ConstantNode} Returns a clone of the node
*/
}, {
key: "map",
value: function map(callback) {
return this.clone();
}
/**
* Create a clone of this node, a shallow copy
* @return {ConstantNode}
*/
}, {
key: "clone",
value: function clone() {
return new ConstantNode(this.value);
}
/**
* Get string representation
* @param {Object} options
* @return {string} str
*/
}, {
key: "_toString",
value: function _toString(options) {
return (0, _string.format)(this.value, options);
}
/**
* Get HTML representation
* @param {Object} options
* @return {string} str
*/
}, {
key: "_toHTML",
value: function _toHTML(options) {
var value = this._toString(options);
switch ((0, _is.typeOf)(this.value)) {
case 'number':
case 'BigNumber':
case 'Fraction':
return '<span class="math-number">' + value + '</span>';
case 'string':
return '<span class="math-string">' + value + '</span>';
case 'boolean':
return '<span class="math-boolean">' + value + '</span>';
case 'null':
return '<span class="math-null-symbol">' + value + '</span>';
case 'undefined':
return '<span class="math-undefined">' + value + '</span>';
default:
return '<span class="math-symbol">' + value + '</span>';
}
}
/**
* Get a JSON representation of the node
* @returns {Object}
*/
}, {
key: "toJSON",
value: function toJSON() {
return {
mathjs: name,
value: this.value
};
}
/**
* Instantiate a ConstantNode from its JSON representation
* @param {Object} json An object structured like
* `{"mathjs": "SymbolNode", value: 2.3}`,
* where mathjs is optional
* @returns {ConstantNode}
*/
}, {
key: "_toTex",
value:
/**
* Get LaTeX representation
* @param {Object} options
* @return {string} str
*/
function _toTex(options) {
var value = this._toString(options);
var type = (0, _is.typeOf)(this.value);
switch (type) {
case 'string':
return '\\mathtt{' + (0, _latex.escapeLatex)(value) + '}';
case 'number':
case 'BigNumber':
{
var finite = type === 'BigNumber' ? this.value.isFinite() : isFinite(this.value);
if (!finite) {
return this.value.valueOf() < 0 ? '-\\infty' : '\\infty';
}
var index = value.toLowerCase().indexOf('e');
if (index !== -1) {
return value.substring(0, index) + '\\cdot10^{' + value.substring(index + 1) + '}';
}
return value;
}
case 'Fraction':
return this.value.toLatex();
default:
return value;
}
}
}], [{
key: "fromJSON",
value: function fromJSON(json) {
return new ConstantNode(json.value);
}
}]);
return ConstantNode;
}(Node);
(0, _defineProperty2["default"])(ConstantNode, "name", name);
return ConstantNode;
}, {
isClass: true,
isNode: true
});