Using bitwise operations on strings (characters)

Hello Friends, I had written a blog post on Quora on Bitwise tricks...So I thought I should share those tricks here on the my Blog also.

Here are some cool Bitwise operations, that you may not be knowing!!!

Convert letter to lowercase: 

• OR by space => (x | ' ') 
• Result is always lowercase even if letter is already lowercase 
• eg. ('a' | ' ') => 'a' ; ('A' | ' ') => 'a'

Convert letter to uppercase: 

• AND by underline => (x & '_') 
• Result is always uppercase even if letter is already uppercase 
• eg. ('a' & '_') => 'A' ; ('A' & '_') => 'A'

Invert letter's case: 

• XOR by space => (x ^ ' ') 
• eg. ('a' ^ ' ') => 'A' ; ('A' ^ ' ') => 'a'

Letter's position in alphabet: 

• AND by chr(31)/binary('11111')/(hex('1F') => (x & "\x1F") 
• Result is in 1..26 range, letter case is not important  
• eg. ('a' & "\x1F") => 1 ; ('B' & "\x1F") => 2

Get letter's position in alphabet (for Uppercase letters only): 

• AND by ? => (x & '?') or XOR by @  => (x ^ '@')  
• eg. ('C' & '?') => 3 ; ('Z' ^ '@') => 26 

Get letter's position in alphabet (for lowercase letters only): 

• XOR by backtick/chr(96)/binary('1100000')/hex('60')  => (x ^ '`')   
• eg. ('d' ^ '`') => 4 ; ('x' ^ '`') => 25 

Note: using anything other than the english letters will produce garbage results