✨ feat(_from_number): Add missing _from_number.

Author: make-github-pseudonymous-again

src/_from_number.js

@@ -0,0 +1,10 @@
+import { Integer } from './Integer' ;
+import { MAX_BASE } from './_limits' ;
+
+export function _from_number ( number ) {
+	const x = number >= 0 ? number : -number ;
+	const is_negative = number >= 0 ? 0 : -1 ;
+	return x < MAX_BASE ?
+		new Integer( MAX_BASE , is_negative , [ x ] ) :
+		new Integer( MAX_BASE , is_negative , [ x / MAX_BASE | 0 , x % MAX_BASE ] ) ;
+}