Introduction

Smalltalk collection api makes heavy use of closures. The methods that are categorized (yes methods in smalltalk can be divided into categories) under Enumeration encompass such protocol:

• allSatisfy:
• anySatisfy:
• associationsDo:
• collect:
• collect:thenSelect:
• count:
• detect:
• detect:ifNone:
• detectMax:
• detectMin:
• detectSum:
• difference:
• do:
• do:separatedBy:
• do:without:
• groupBy:having:
• inject:into:
• intersection:
• noneSatisfy:
• reject:
• select:
• select:thenCollect:
• union:

Further information on what they do can be found here

References

• Traits : Tools and Methodology
• Ruby also has a very similar protocol
• More ruby enumerable method on from version 1.9
• Scala also has a interesting enumeration protocol.