@push.rocks/lik
Version:
Provides a collection of lightweight helpers and utilities for Node.js projects.
82 lines (81 loc) • 4.97 kB
JavaScript
/* ============
The FastMap has the goal of creating the fastes to use map possible in JS
============ */
import * as plugins from './lik.plugins.js';
/**
* fast map allows for very quick lookups of objects with a unique key
*/
export class FastMap {
constructor() {
this.mapObject = {};
}
isUniqueKey(keyArg) {
return this.mapObject[keyArg] ? false : true;
}
addToMap(keyArg, objectArg, optionsArg) {
if (this.isUniqueKey(keyArg) || (optionsArg && optionsArg.force)) {
this.mapObject[keyArg] = objectArg;
return true;
}
else {
return false;
}
}
getByKey(keyArg) {
return this.mapObject[keyArg];
}
removeFromMap(keyArg) {
const removedItem = this.getByKey(keyArg);
delete this.mapObject[keyArg];
return removedItem;
}
getKeys() {
const keys = [];
for (const keyArg in this.mapObject) {
if (this.mapObject[keyArg]) {
keys.push(keyArg);
}
}
return keys;
}
clean() {
this.mapObject = {};
}
/**
* returns a new Fastmap that includes all values from this and all from the fastmap in the argument
*/
concat(fastMapArg) {
const concatedFastmap = new FastMap();
for (const key of this.getKeys()) {
concatedFastmap.addToMap(key, this.getByKey(key));
}
for (const key of fastMapArg.getKeys()) {
concatedFastmap.addToMap(key, fastMapArg.getByKey(key), {
force: true,
});
}
return concatedFastmap;
}
/**
* tries to merge another Fastmap
* Note: uniqueKeyCollisions will cause overwrite
* @param fastMapArg
*/
addAllFromOther(fastMapArg) {
for (const key of fastMapArg.getKeys()) {
this.addToMap(key, fastMapArg.getByKey(key), {
force: true,
});
}
}
async find(findFunctionArg) {
for (const key of this.getKeys()) {
const item = this.getByKey(key);
const findFunctionResult = await findFunctionArg(item);
if (findFunctionResult) {
return item;
}
}
}
}
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