Porting python line to c# code

Question

I'm porting short python code to c# but I stopped on this line, I don't know what does it mean

array.append( ("%x" % value)[-1] )

anyone? thx

Answer 1

This: "%x" % value gives you a string containing the value number represented in hexadecimal.

The [-1] gives you the last character of the above.

array.append adds that character to the end of array (which is presumably a list).

You can figure this out by messing around with the Python REPL:

>>> "%x" % 142
'8e'
>>> ("%x" % 142)[-1]
'e'
>>> array = []
>>> array.append(("%x" % 142)[-1])
>>> array
['e']

Answer 2

That's the same of doing it:

array.append(str(hex(value))[-1])

hex() converts an integer number (of any size) to a lowercase hexadecimal string prefixed with "0x".

[-1] gives you the last char of a string.