ifont/src/utils.ts

An isomorphic icon font generator with support for ligatures.

/* MAIN */

const castArray = <T> ( value: T[] | T ): T[] => {

  return Array.isArray ( value ) ? value : [value];

};

const memoize = <T, U> ( fn: ( arg: T ) => U ): (( arg: T ) => U) => {

  const cache = new Map<T, U> ();

  return ( arg: T ): U => {

    const cached = cache.get ( arg );

    if ( cached || cache.has ( arg ) ) return cached!;

    const result = fn ( arg );

    cache.set ( arg, result );

    return result;

  };

};

const round = ( value: number, precision: number ): number => {

  return Math.round ( value / precision ) * precision;

};

const without = <T> ( values: T[], value: T ): T[] => {

  return values.filter ( other => other !== value );

};

/* EXPORT */

export {castArray, memoize, round, without};