		@@ -83,10 +83,15 @@ const parse_arg = (arg) => {

		const trim_filter = (input) => input
		.filter(a => typeof a === 'string')
		.map(s => s.trim())
		.filter(s => s.length)

		module.exports = (args = [], alias = []) => {

		if(!Array.isArray(args) \|\| !Array.isArray(alias))
		if (!Array.isArray(args) \|\| !Array.isArray(alias))
		throw Error(`expected input to be array(s). Eg clia(process.argv.slice(2),['alias','names'])`)

		const parsed = combine_input(args)
		const parsed = combine_input(trim_filter(args))

		copy_alias_values(parsed, alias)
		copy_alias_values(parsed, trim_filter(alias))

		@@ -93,0 +98,0 @@ return {

package.json

		{
		"name": "clia",
		"version": "2020.8.9",
		"version": "2020.8.10",
		"description": "Command line parser and t3st example project",
		@@ -5,0 +5,0 @@ "main": "index.js",

README.md

		@@ -18,3 +18,3 @@ # clia

		const conf = clia(process.argv.slice(2)) // in your app
		const conf = clia(process.argv.slice(2))

		@@ -37,6 +37,8 @@ // test in your browser on: https://npm.runkit.com/clia

		## parsing
		## edge cases

		If `--` is encountered, it is ignored. All subsequent inputs are treated as arguments.
		Empty or non-string inputs are ignored. Spaces are trimmed from inputs.

		When `--` is encountered, it is ignored. All subsequent inputs are treated as arguments even if they start with `-`.

		An error is thrown when:
		@@ -43,0 +45,0 @@ * any argument containts `__proto__` to prevent prototype pollution

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