TWiR quote of the week

[Cerber-Ursi]

Quite complex description of the "find-this-method" task:

@ExpHP

my first thought upon seeing the question "I have an Iterator of X and need a Y " was to look at the FromIterator impls of Y .

If that impl didn’t exist, I’d then look for the following:

• Other FromIterator<X> impls for String to see if any of those X can easily be produced from char (and then I would call map before .collect() ).
• impl FromIterator<char> for Vec<u8> . If this existed I would use String::from_utf8(iterator.collect()) .
• impl Add<char> for String . If this existed, I would use .fold(String::new(), |s, c| s + c)
• methods of char to see if there’s anything that lets you obtain the bytes. Indeed, there is encode_utf8 , which even gives a &mut str , so one can write

.fold(String::new(), |s, c| {
    let mut buffer = [u8; 4];
    s += &*c.encode_utf8(&mut buffer);
    s
})

• idly check the inherent methods of String for whatever pops out at me

and if I could still find nothing after all of that I’d slam my head into a wall somewhere.