Binary fun. Learn you some binary.

0b101.js

'use strict';

// only works for binary numbers 0-15 to help with understanding binary

function coerceToBinary( n ) {
	n = n === +n ? ( n >>> 0 ).toString( 2 ) : n;
	
	if( n < 0 )
		return coerceToBinary( n );
	
	if( n.length === 6 && n.startsWith( '0b' ) )
		return n;
	else if( n.length > 6 )
		return coerceToBinary( ( ''+n ).substr( n.length - 4, n.length ) );
	else if( n.length === 4 )
		return '0b' + n;
	else if( n.length === 3 )
		return '0b0' + n;
	else if( n.length === 2 )
		return '0b00' + n;
	else if( n.length === 1 )
		return '0b000' + n;
	
	return n;
}

const ctb = n => console.log( coerceToBinary( n ) );

// Logical operators

// Logical AND
ctb( 0b1100 & 0b1010 ); // 0b1000 or 8

// Logical OR
ctb( 0b0100 | 0b0010 ); // 0b0110 or 6

// Logical NOT
ctb( ~0b0101 ); // 0b1010 or 10

// Logical XOR
ctb( 0b0101 ^ 0b0001 ); // 0b0100 or 4

// Logical Left Shift
ctb( 0b0101 << 1 ); // 0b1010 or 10

// Logical Right Shift
ctb( 0b0101 >> 1 ); // 0b0010 or 2