@tsdotnet/linq/dist/esm/resolutions/firstOrDefault.js

A familiar set of functions that operate on JavaScript iterables (ES2015+) in a similar way to .NET's LINQ does with enumerables.

function firstOrDefault(defaultValue) {
    return function (sequence) {
        if (!sequence)
            return defaultValue;
        if (sequence instanceof Array)
            return sequence.length == 0 ? defaultValue : sequence[0];
        const iterator = sequence[Symbol.iterator]();
        const first = iterator.next();
        return first.done ? defaultValue : first.value;
    };
}

export { firstOrDefault as default };
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