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Add is.numericString() (#67)

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Itai Steinherz 2018-11-01 13:21:49 +02:00 • committed by Sindre Sorhus
parent 9ac56f1be7
commit 7317226c80
3 changed files with 23 additions and 2 deletions
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source/index.ts
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@ -135,10 +135,13 @@ namespace is { // tslint:disable-line:no-namespace
export const symbol = isOfType<Symbol>('symbol');
// tslint:enable:variable-name
export const nullOrUndefined = (value: any): value is null | undefined => null_(value) || undefined(value);
export const numericString = (value: any): boolean =>
string(value) && value.length > 0 && !Number.isNaN(Number(value));
export const array = Array.isArray;
export const buffer = isBuffer;
export const nullOrUndefined = (value: any): value is null | undefined => null_(value) || undefined(value);
export const object = (value: any): value is object => !nullOrUndefined(value) && (function_(value) || isObject(value));
export const iterable = (value: any): value is IterableIterator<any> => !nullOrUndefined(value) && function_(value[Symbol.iterator]);
export const asyncIterable = (value: any): value is AsyncIterableIterator<any> => !nullOrUndefined(value) && function_(value[Symbol.asyncIterator]);