A binary operator is a way to manipulate binary data. We already know there are &
, |
, ^
, <<
and >>
operators, but not all of us know the secret of each operator. Let's explore what tricks behind those operators using go language.
Multiply or Divide By 2
Multiply 2 using * 2
or divide using / 2
is the normal way, but how we can achieve the same with the binary operator?
divide by 2 | shift right by 1 | someNumber >> 1 |
multiply by 2 | shift left by 1 | someNumber << 1 |
// multiply by 2
fmt.Println(4 << 1)
// Output: 8
// divide by 2
fmt.Println(4 >> 1)
// Output: 2
Change case of character
// to upper case char
fmt.Println((string)('c' & '_'))
// Output: C
// to lower case char
fmt.Println(string('A' | ' '))
// Output: a
Invert case of character
Invert char can be achieved by xor
with space
fmt.Println(string('A' ^ ' '), string('b' ^ ' '))
// Output: a B
Get letter position
Get a letter's position in the alphabet (1-26) using and with 31
fmt.Println('z' & 31)
// Output: 26
Check number odd or even
Simple check if the number is odd/even using and with 1
, if the number is odd will return true
// odd number return true
fmt.Println(7 & 1 > 0)
// Output: true
// even number return false
fmt.Println(8 & 1 > 0)
// Output: false
Try it yourself at https://play.golang.org/p/-wsIlDgBTmF
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