CODEWITHSUNDEEP
stringrustcomparisoncharacterliterals
road_rash
road_rash

Reputation: 145

Declare char for comparison

As part of Advent of Code 2020 day 3, I'm trying to compare characters in a string to a specific character.

fn main(){
    let str_foo = 
"...##..#
##.#..#.";
    
    for char in str_foo.chars() {
        println!("{}", char == "#");
    }
    
}

The error I get is expected char, found &str.

I'm struggling to find a clean way to cast either the left or right side of the equality check so that they can be compared.

Upvotes: 0

Views: 411

Answers (1)

pretzelhammer
pretzelhammer

Reputation: 15165

Use single quotes for character literals. Fixed:

fn main() {
    let str_foo = 
"...##..#
##.#..#.";
    
    for char in str_foo.chars() {
        println!("{}", char == '#');
    }
}

playground

Upvotes: 3

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