in Dart, is there a `parse` for `bool` as there is for `int`?

Question

in Dart, there's a convenient way to convert a String to an int:

int i = int.parse('123'); 

is there something similar for converting bools?

bool b = bool.parse('true'); 

Answer 1

Bool has no methods.

var val = 'True'; bool b = val.toLowerCase() == 'true'; 

should be easy enough.

With recent Dart versions with extension method support the code could be made look more like for int, num, float.

extension BoolParsing on String {   bool parseBool() {     return this.toLowerCase() == 'true';   } }     void main() {   bool b = 'tRuE'.parseBool();   print('${b.runtimeType} - $b'); } 

See also https://dart.dev/guides/language/extension-methods

To the comment from @remonh87 If you want exact 'false' parsing you can use

extension BoolParsing on String {   bool parseBool() {     if (this.toLowerCase() == 'true') {       return true;     } else if (this.toLowerCase() == 'false') {       return false;     }          throw '"$this" can not be parsed to boolean.';   } } 

Answer 2

No. Simply use:

String boolAsString; bool b = boolAsString == 'true';