@function charsFromBase($base: 10) {
	$chars: (
		// Binary
			2: "01",
		// Octal
			8: "01234567",
		// Decimal
			10: "0123456789",
		// Hexadecimal
			16: "0123456789abcdef",
		// Base 36
			36: "0123456789abcdefghijklmnopqrstuvwxyz",
		// Base 64
			64: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
	);

	@if not map-has-key($chars, $base) {
		@warn "There is no base `#{$base}` available.";
	}
	@return map-get($chars, $base);
}

@function is-negative($number) {
	@if type-of($number) == "number" {
		@return if($number < 0, true, false);
	} @else {
		@return false;
	}
}

// parseInt
// Parse a string to a number using a

@function parseInt($str, $radix: 10) {
	@if type-of($str) == "number" {
		@return $str;
	}
	$chars: charsFromBase($radix);
	$result: 0;

	$is-negative: is-negative($str);

	@for $i from 1 through str-length($str) {
		$char: str-slice($str, -$i, -$i);
		$value: str-index($chars, $char) - 1;
		$powed: pow($radix, ($i - 1));
		@if type-of($value) == "string" {
			@if $value == "-1" {
				$result: $result + ($powed * -1);
			}
		} @else {
			$result: $result + ($powed * $value);
		}
	}

	@return if($is-negative, -$result, $result);
}

// Half the value
@function half($num) {
	@return $num / 2;
}
@function h($num) {
	@return half($num);
}

// Make number ABS
@function abs($num) {
	@if $num >= 0 {
		@return $num;
	}
	@return -1 * $num;
}

// Make the number negative or positive
@function negative($num) {
	@if $num < 0 {
		@return abs($num);
	}
	@return parseInt($num);
}
@function n($num) {
	@return negative($num);
}

// A more simple function to create Percentages
@function perc($val, $of) {
	@return ($val / $of) * 100%;
}