index.d.ts
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	/**
	Check if [`argv`](https://nodejs.org/docs/latest/api/process.html#process_process_argv) has a specific flag.

	@param flag - CLI flag to look for. The `--` prefix is optional.
	@param argv - CLI arguments. Default: `process.argv`.
	@returns Whether the flag exists.

	@example
	```
	// $ ts-node foo.ts -f --unicorn --foo=bar -- --rainbow

	// foo.ts
	import hasFlag = require('has-flag');

	hasFlag('unicorn');
	//=> true

	hasFlag('--unicorn');
	//=> true

	hasFlag('f');
	//=> true

	hasFlag('-f');
	//=> true

	hasFlag('foo=bar');
	//=> true

	hasFlag('foo');
	//=> false

	hasFlag('rainbow');
	//=> false
	```
	*/
	declare function hasFlag(flag: string, argv?: string[]): boolean;

	export = hasFlag;