20 lines
764 B
TypeScript
20 lines
764 B
TypeScript
export function isNumber<T extends number>(value: T | unknown): value is number {
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return Object.prototype.toString.call(value) === '[object Number]'
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}
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export function isString<T extends string>(value: T | unknown): value is string {
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return Object.prototype.toString.call(value) === '[object String]'
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}
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export function isNotEmptyString(value: any): boolean {
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return typeof value === 'string' && value.length > 0
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}
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export function isBoolean<T extends boolean>(value: T | unknown): value is boolean {
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return Object.prototype.toString.call(value) === '[object Boolean]'
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}
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export function isFunction<T extends (...args: any[]) => any | void | never>(value: T | unknown): value is T {
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return Object.prototype.toString.call(value) === '[object Function]'
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}
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