rc-js-util/bin/esm/map/impl/map-intialize-get.js

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

export function mapInitializeGet(map, key, getValue) {
    let value = map.get(key);
    if (value !== undefined) {
        return value;
    }
    value = getValue(key);
    map.set(key, value);
    return value;
}
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