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stringdartcontainscounting

How can I count the number of a letter in a string using Dart?

I'm trying to calculate how many of the letter a I have in the sentence: Hello Jordania.

I found the function contains(). I'm using it like this:

var phrase = "Hello Jordania";
var comptenbrdea = phrase.contains('a');
print(comptenbrdea);

As we know, I got True as a response. I couldn't find the right function to calculate how many times I get an a. I might be able to do something with a loop if I can check every single character? I'm lost on this.

Solution

  • Here's a simple way to do it:

    void main() {
  print('a'.allMatches('Hello Jordania').length); // 2
}

    Edit: the tested string is the parameter, not the character to be counted.