Problem Statement

A pangram is a sentence that contains all the letters of the English alphabet at least once. For example:   The quick brown fox jumps over the lazy dog.

Write a function or method to check a sentence to see if it is a   pangram   (or not)   and show its use.

Let's start with the solution:

!String methodsFor: 'testing'!
isPangram
	^((self collect: [:c | c asUppercase]) select: [:c | c >= $A and: [c <= $Z]]) asSet size = 26


'The quick brown fox jumps over the lazy dog.' isPangram