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joshuacerbito/ensure.ts

Created July 7, 2022 21:18
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[TS] ensure function to fix "T | undefined" from Array functions
Raw
ensure.ts
function ensure<T>(argument: T | undefined | null, message: string = 'This value was promised to be there.'): T {
if (argument === undefined || argument === null) {
throw new TypeError(message);
}
return argument;
}
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