agentscript

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[Symbol.species](https://goo.gl/Zsxwxd) * * @readonly */ static get [Symbol.species]() { return AgentArray } /** * Convert an existing Array to an AgentArray "in place". * Use array.slice() if a new array is wanted * * @param {Array} array Array to convert to AgentArray * @returns {AgentArray} array converted to AgentArray */ static fromArray(array) { const aarray = Object.setPrototypeOf(array, AgentArray.prototype) return aarray } /** * Creates an instance of AgentArray. Simply pass-through to super() * now, but may add initialization code later. * @param {*} args Zero or more items in Array * @example * let aa = new AgentArray({x:0,y:0}, {x:0,y:1}, {x:1,y:0}) * //=> [{ x: 0, y: 0 }, { x: 0, y: 1 }, { x: 1, y: 0 }] */ constructor(...args) { super(...args) // maybe do some initialization later } /** * See {@link World} and [MyClass's foo property]{@link World#bboxTransform}. * Convert this AgentArray to Array in-place * * @returns {Array} This AgentArray converted to Array */ toArray() { Object.setPrototypeOf(this, Array.prototype) return this } // NL: Return true if reporter true for all of this set's objects // Use Array.every(). Also Array.some() // all (reporter) { return this.every(reporter) } // // Return !isEmpty() // any () { return this.length !== 0 } // NL: Return AgentArray with reporter(agent) true. Use Array.filter() // with (reporter) { return this.filter(reporter) } /** * Return true if there are no items in this Array * * @returns {boolean} * @example * new AgentArray().isEmpty() * //=> true * @example * aa.isEmpty() * //=> false */ isEmpty() { return this.length === 0 } /** * Return first item in this array. Returns undefined if empty. * * @returns {any} * @example * aa.first() * //=> { x: 0, y: 0 } */ first() { return this[0] } /** * Return last item in this array. Returns undefined if empty. * * @returns {any} * @example * aa.last() * //=> { x: 1, y: 0 } */ last() { return this[this.length - 1] } /** * Return at index. Returns undefined if empty. * Wrap the index to be within the array. * * @returns {any} * @example * aa.atIndex(aa.length) * //=> { x: 0, y: 0 } */ atIndex(i) { if (this.length === 0) return undefined const index = util.mod(i, this.length) return this[index] } /** * Return true if fcn(element) returns true for each element in this array. * Same as Array.every, using NetLogo's name * * @param {Function} fcn fcn(element) return boolean * @returns {boolean} true if fcn returns true for all elements */ all(fcn) { return this.every(fcn) } /** * Return array of property values from this array's objects. * Array type is specified, defaults to AgentArray * * @param {String} key Property name * @param {Array} [type=AgentArray] Type of array (Array, Uint8Array, ...) * @returns {Array} Array of given type * @example * aa.props('x') * //=> [0, 0, 1] * @example * aa.props('y') * //=> [0, 1, 0] */ props(key, type = AgentArray) { const result = new type(this.length) for (let i = 0; i < this.length; i++) { result[i] = this[i][key] } return result } // Creates an OofA for several sets of props. // Obj is key, arrayType pairs: x: Float32Array // Result is this.props(key, arrayType) for each key /** * Creates an Object of Arrays, one Array per each property in obj. * Obj is key, arrayType pairs: x: Float32Array * This is advanced, used for web workers, very large data sets, and remote communication * * @param {Object} obj Object of prop, array type pairs * @returns {Object} * @example * aa.typedSample({x: Uint8Array, y: Uint8Array}) * //=> {x: new Uint8Array([0, 0, 1]), y: new Uint8Array([0, 1, 0])} */ typedSample(obj) { // const length = this.length const result = {} // note: use util's forLoop, does not iterate over this agent array. util.forLoop(obj, (val, key) => { result[key] = this.props(key, val) }) return result } // Return AgentArray of results of the function fcn // Similar to "props" but can return computation over all keys // Odd: as.props('type') twice as fast as as.results(p => p.type)? // results(fcn) { // const result = new AgentArray(this.length) // for (let i = 0; i < this.length; i++) { // result[i] = fcn(this[i]) // } // return result // } /** * Return new AgentArray of the unique values of this array * * @returns {AgentArray} */ uniq() { // return AgentArray.fromArray(Array.from(new Set(this))) return AgentArray.from(new Set(this)) } /** * Call fcn(agent, index, array) for each item in AgentArray. * Index & array optional. * Array assumed not mutable. * Note: 5x+ faster than this.forEach(fcn) * * @param {Function} fcn fcn(agent, [index], [array]) * @returns {this} Return this for chaining. */ forLoop(fcn) { for (let i = 0, len = this.length; i < len; i++) { fcn(this[i], i, this) } return this } /** * Call fcn(agent, [ i, AgentArray ]) for each agent in AgentArray. * where i = agent's array index and AgentArray is this array * Array can shrink. If it grows, will not visit beyond original length. * If it either shrinks or grows, it will console.log a message * "ask" is NetLogo term. * * @param {Function} fcn fcn(agent, [index], [array]) */ ask(fcn) { const length = this.length // for (let i = 0; i < length || i < this.length; i++) { for (let i = 0; i < Math.min(length, this.length); i++) { fcn(this[i], i, this) } if (length != this.length) { const name = this.name || this.constructor.name const direction = this.length < length ? 'decreasing' : 'increasing' util.warn(`AgentArray.ask array mutation: ${name}: ${direction}`) } // return this } /** * Return all elements returning f(obj, [index, array]) true, as in ask() * NetLogo term, simply calls this.filter(fcn) * * @param {Function} fcn fcn(agent, [index], [array]) * @returns {AgentArray} * @description * Use: turtles.with(t => t.foo > 20).ask(t => t.bar = true) */ with(fcn) { return this.filter(fcn) } // Return all other than me. other(t) { return this.filter(o => o !== t) } // Return an AgentArray of values for each object in AgentArray // // If fcn is a string, it will return that property value. // Otherwise it returns the value returned from fcn(obj) getValues(fcn) { const props = new AgentArray() if (util.isString(fcn)) { this.forLoop(obj => props.push(obj[fcn])) } else { this.forLoop(obj => props.push(fcn(obj))) } return props } // Return count of agents with reporter(agent) true count(reporter) { return this.reduce((prev, o) => prev + (reporter(o) ? 1 : 0), 0) } sum(key) { return this.reduce((prev, o) => prev + (key ? o[key] : o), 0) } avg(key) { return this.sum(key) / this.length } min(key) { return this.reduce( (prev, o) => Math.min(prev, key ? o[key] : o), Infinity ) } max(key) { return this.reduce( (prev, o) => Math.max(prev, key ? o[key] : o), -Infinity ) } extent(key) { return [this.min(key), this.max(key)] } histogram(key, bins = 10, min = this.min(key), max = this.max(key)) { const binSize = (max - min) / bins const aa = new AgentArray(bins) aa.fill(0) this.ask(a => { const val = key ? a[key] : a if (val < min || val > max) { util.warn(`histogram bounds error: ${val}: ${min}-${max}`) } else { let bin = Math.floor((val - min) / binSize) if (bin === bins) bin-- // val is max, round down aa[bin]++ } }) // Object.assign(aa, {bins, min, max, binSize, key}) aa.parameters = { key, bins, min, max, binSize, arraySize: this.length } // console.log(key, bins, min, max, binSize, aa) return aa } /** * Create copy of this AgentArray * @returns AgentArray */ clone() { return this.slice(0) // Returns an AgentArray rather than Array! } // Randomize the AgentArray in place. Use clone first if new AgentArray needed. // Return "this" for chaining. shuffle() { return util.shuffle(this) } // Return this AgentArray sorted by the reporter in ascending/descending order. // If reporter is a string, convert to a fcn returning that property. // Use clone if you don't want to mutate this array. /** * Return this AgentArray sorted by the reporter in ascending/descending order. * If reporter is a string, convert to a fcn returning that property. * * @param {function} reporter * @param {boolean} [ascending=true] * @returns {AgentArray} */ sortBy(reporter, ascending = true) { util.sortObjs(this, reporter, ascending) return this } // Remove an item from an array. Binary search if f given // Array unchanged if item not found. remove(o, f) { const i = this.agentIndex(o, f) if (i !== -1) { this.splice(i, 1) } else { console.log(`remove: ${o.id} not in AgentArray`) } return this // chaining } insert(o, f) { const i = this.sortedIndex(o, f) if (this[i] === o) { console.log(`insert: item ${o.id} already in AgentArray`) return } this.splice(i, 0, o) // copyWithin? } // Binary search: // Return array index of item, where array is sorted. // If item not found, return index for item for array to remain sorted. // f is used to return an integer for sorting, defaults to identity. // If f is a string, it is the object property to sort by. // Adapted from underscore's _.sortedIndex. sortedIndex(item, f = util.identityFcn) { if (util.isString(f)) f = util.propFcn(f) const value = f(item) // Why not array.length - 1? Because we can insert 1 after end of array. // let [low, high] = [0, array.length] let low = 0 let high = this.length while (low < high) { const mid = (low + high) >>> 1 // floor (low+high)/2 if (f(this[mid]) < value) { low = mid + 1 } else { high = mid } } return low } // Return index of value in array with given property or -1 if not found. // Binary search if property isnt null // Property can be string or function. // Use property = identity to compare objs directly. agentIndex(item, property) { if (!property) return this.indexOf(item) const i = this.sortedIndex(item, property) return this[i] === item ? i : -1 } // True if item is in array. Binary search if f given contains(item, f) { return this.agentIndex(item, f) >= 0 } // Return a random agent. Return undefined if empty. oneOf() { return util.oneOf(this) } // Return a random agent, not equal to agent otherOneOf(agent) { return util.otherOneOf(this, agent) } // Return n other random agents from this array // otherNOf (n, agent) { return util.otherNOf(n, this, agent) } otherNOf(n, item) { if (this.length < n) throw Error('AgentArray: otherNOf: length < N') return this.clone().remove(item).shuffle().slice(0, n) } // Return the first agent having the min/max of given value of f(agent). // If reporter is a string, convert to a fcn returning that property minOrMaxOf(min, reporter, valueToo = false) { if (this.isEmpty()) throw Error('min/max OneOf: empty array') if (typeof reporter === 'string') reporter = util.propFcn(reporter) let o = null let val = min ? Infinity : -Infinity for (let i = 0; i < this.length; i++) { const a = this[i] const aval = reporter(a) if ((min && aval < val) || (!min && aval > val)) { ;[o, val] = [a, aval] } } return valueToo ? [o, val] : o } // The min version of the above minOneOf(reporter) { return this.minOrMaxOf(true, reporter) } // The max version of the above maxOneOf(reporter) { return this.minOrMaxOf(false, reporter) } // Like the pair above, but return both the object and its value in an array. // const [obj, value] = minValOf(...) minValOf(reporter) { return this.minOrMaxOf(true, reporter, true) } maxValOf(reporter) { return this.minOrMaxOf(false, reporter, true) } // Return n random agents as AgentArray. // See [Fisher-Yates-Knuth shuffle](https://goo.gl/fWNFf) // for better approach for large n. nOf(n) { if (n > this.length) throw Error(`nOf: n larger than AgentArray: ${n} ${this.length}`) if (n === this.length) return this const result = new AgentArray() while (result.length < n) { const o = this.oneOf() if (!(o in result)) result.push(o) } return result } // Return a new AgentArray of the n min/max agents of the value of reporter, // in ascending order. // If reporter is a string, convert to a fcn returning that property // NOTE: we do not manage ties, see NetLogo docs. minOrMaxNOf(min, n, reporter) { if (n > this.length) { throw Error('min/max nOf: n larger than AgentArray') } const as = this.clone().sortBy(reporter) return min ? as.slice(0, n) : as.slice(as.length - n) } minNOf(n, reporter) { return this.minOrMaxNOf(true, n, reporter) } maxNOf(n, reporter) { return this.minOrMaxNOf(false, n, reporter) } } // // Return shallow copy of a portion of this AgentArray // // [See Array.slice](https://goo.gl/Ilgsok) // // Default is to clone entire AgentArray // cloneRange(begin = 0, end = this.length) { // return this.slice(begin, end) // Returns an AgentArray rather than Array! // } export default AgentArray </code></pre></article></section><footer class="footer" id="PeOAagUepe"><div class="wrapper">AgentScript version: 0.10.20 using clean-jsdoc-theme</div></footer></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type anything to view search result</span></div></div></div><div class="mobile-menu-icon-container"><button class="icon-button" id="mobile-menu" data-isopen="false" aria-label="menu"><svg><use xlink:href="#menu-icon"></use></svg></button></div><div id="mobile-sidebar" class="mobile-sidebar-container"><div class="mobile-sidebar-wrapper"><a href="/" class="sidebar-title sidebar-title-anchor">Home</a><div class="mobile-nav-links"><div class="navbar-item"><a id="github-mobile" href="https://github.com/backspaces/agentscript" target="">Github</a></div><div class="navbar-item"><a id="AgentScript-mobile" href="https://code.agentscript.org" target="">AgentScript.org</a></div><div class="navbar-item"><a id="npm-mobile" href="https://www.npmjs.com/package/agentscript" target="">npm</a></div><div class="navbar-item"><a id="unpkg-mobile" href="https://unpkg.com/browse/agentscript/" target="">unpkg</a></div></div><div class="mobile-sidebar-items-c"><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-classes"><div>Classes</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="AgentArray.html">AgentArray</a></div><div class="sidebar-section-children"><a href="AgentList.html">AgentList</a></div><div class="sidebar-section-children"><a href="AgentSet.html">AgentSet</a></div><div class="sidebar-section-children"><a href="Animator.html">Animator</a></div><div class="sidebar-section-children"><a href="DataSet.html">DataSet</a></div><div class="sidebar-section-children"><a href="GUI.html">GUI</a></div><div class="sidebar-section-children"><a href="GeoDataSet.html">GeoDataSet</a></div><div class="sidebar-section-children"><a href="Keyboard.html">Keyboard</a></div><div class="sidebar-section-children"><a href="Link.html">Link</a></div><div class="sidebar-section-children"><a href="Links.html">Links</a></div><div class="sidebar-section-children"><a href="Model.html">Model</a></div><div class="sidebar-section-children"><a href="Model3D.html">Model3D</a></div><div class="sidebar-section-children"><a href="Mouse.html">Mouse</a></div><div class="sidebar-section-children"><a href="Patch.html">Patch</a></div><div class="sidebar-section-children"><a href="Patches.html">Patches</a></div><div class="sidebar-section-children"><a href="RGBDataSet.html">RGBDataSet</a></div><div class="sidebar-section-children"><a href="ThreeDraw.html">ThreeDraw</a></div><div class="sidebar-section-children"><a href="Turtle.html">Turtle</a></div><div class="sidebar-section-children"><a href="Turtle3D.html">Turtle3D</a></div><div class="sidebar-section-children"><a href="Turtles.html">Turtles</a></div><div class="sidebar-section-children"><a href="TwoDraw.html">TwoDraw</a></div><div class="sidebar-section-children"><a href="World.html">World</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-modules"><div>Modules</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="module-src_geojson.html">src/geojson</a></div><div class="sidebar-section-children"><a href="module-src_gis.html">src/gis</a></div><div class="sidebar-section-children"><a href="module-src_utils.html">src/utils</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-tutorials"><div>Tutorials</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="tutorial-1 - 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