mirror of
https://github.com/denoland/deno.git
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70 lines
1.7 KiB
TypeScript
70 lines
1.7 KiB
TypeScript
export function isArray(value: unknown): boolean {
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return Array.isArray(value);
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}
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export function isBoolean(value: unknown): boolean {
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return typeof value === "boolean" || value instanceof Boolean;
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}
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export function isNull(value: unknown): boolean {
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return value === null;
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}
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export function isNullOrUndefined(value: unknown): boolean {
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return value === null || value === undefined;
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}
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export function isNumber(value: unknown): boolean {
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return typeof value === "number" || value instanceof Number;
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}
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export function isString(value: unknown): boolean {
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return typeof value === "string" || value instanceof String;
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}
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export function isSymbol(value: unknown): boolean {
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return typeof value === "symbol";
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}
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export function isUndefined(value: unknown): boolean {
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return value === undefined;
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}
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export function isObject(value: unknown): boolean {
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return value !== null && typeof value === "object";
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}
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export function isError(e: unknown): boolean {
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return e instanceof Error;
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}
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export function isFunction(value: unknown): boolean {
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return typeof value === "function";
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}
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export function isRegExp(value: unknown): boolean {
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return value instanceof RegExp;
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}
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export function isPrimitive(value: unknown): boolean {
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return (
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value === null || (typeof value !== "object" && typeof value !== "function")
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);
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}
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export function validateIntegerRange(
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value: number,
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name: string,
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min = -2147483648,
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max = 2147483647
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): void {
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// The defaults for min and max correspond to the limits of 32-bit integers.
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if (!Number.isInteger(value)) {
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throw new Error(`${name} must be 'an integer' but was ${value}`);
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}
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if (value < min || value > max) {
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throw new Error(
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`${name} must be >= ${min} && <= ${max}. Value was ${value}`
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);
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}
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}
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