memoization-registry/dist/utils.js

A generalized multi-key memoization solution that does not leak memory.

/* IMPORT */
import MildMap from 'mild-map';
/* MAIN */
const isObject = (value) => {
    if (value === null)
        return false;
    const type = typeof value;
    return type === 'object' || type === 'function';
};
const isUndefined = (value) => {
    return value === undefined;
};
const isWeakRef = (value) => {
    return value instanceof WeakRef;
};
const last = (values) => {
    return values[values.length - 1];
};
const traverse = (node, keys) => {
    return keys.map(key => {
        const next = node.get(key) || new MildMap();
        node.set(key, next);
        node = next;
        return node;
    });
};
const weakize = (values) => {
    return values.map(value => {
        if (isObject(value)) {
            return new WeakRef(value);
        }
        else {
            return value;
        }
    });
};
const unweakize = (values) => {
    return values.map(value => {
        if (isWeakRef(value)) {
            return value.deref();
        }
        else {
            return value;
        }
    });
};
/* EXPORT */
export { isObject, isUndefined, last, traverse, weakize, unweakize };