baats-core v0.2.2

BAATS (Baavgai's TypeScript) Library

This is part of a collection of code I use for my projects.
If you find it interesting, feel free to use it in yours.

Module baats-core

A TypeScript port of node-clone.

clone<T>(parent: T, circular = true, depth = Infinity, prototype: any = undefined): T;

It's amazaing how much functional programming fun opens up with this simple function. Half the time I've loaded all of lodash was for this function and clone.

range(size: number): number[];

Padding functions are so small you just end up copy pasting them... Or, some cases, just finding a library and moving on. I wrote lpad and don't expect anyone to care. But the first guy to get such code out there really managed to cause some drama: How one developer just broke Node, Babel and thousands of projects in 11 lines of JavaScript

repChar(size: number, symbol?: string): string;
lpad(value: any, size: number, symbol?: string): string;
rpad(value: any, size: number, symbol?: string): string;
zpad(value: any, zeros: number): string;

A little 24 char randomized string. Not quite a UUID, but pretty good. Made with simplicity and speed in mind.

uniqueId(): string;

Filter to uniq items, accepts optional key function. Maintains order and is non destructive.

uniq<T>(xs: Array<T>, getKey?: (x: T) => string): T[];

Test Code

import * as lib from "baats-core";

const out = console.log;

const line = () => out(lib.repChar(40, '-'));

line();
lib
  .range(5)
  .map(x=>x+7)
  .forEach(x=>console.log(`${lib.zpad(x,2)}: ${lib.uniqueId()}`));

line();

out(lib.lpad("lpad", 10, '.')); 
out(lib.rpad("rpad", 10, '.x')); 

line();

class Foo {
  constructor(public name: string, private age: number) { }
  greeting() { console.log(`Hello ${this.name}`); }
}
const fooTest = (x:Foo) => {
  out(JSON.stringify(x));
  x.greeting();
  return x;
}

let alice = fooTest(new Foo('Alice', 42));
let bob = lib.clone(alice);
bob.name = 'Bob';
fooTest(bob);
fooTest(alice);

line();

const ut = ["Bob", "Alice", "Bob", "Chuck", "bob", "Dave"];

out(`uniq([${ut}]) = ${lib.uniq(ut)}`);
out(`uniq([${ut}], x=>x.toLowerCase()) = ${lib.uniq(ut, x=>x.toLowerCase())}`);

line();

Licence

MIT