A new version of Collections was added to project The Inbox:
http://source.squeak.org/inbox/Collections-mt.812.mcz

==================== Summary ====================

Name: Collections-mt.812
Author: mt
Time: 18 December 2018, 11:58:09.289023 am
UUID: 64ff5a45-61b5-5642-aa46-9fbeac0215dd
Ancestors: Collections-eem.811

Adds a small scripting/debugging interface to evaluate code on a heterogeneous collection. Ignore errors on the way.

1. Example: A bunch of morphs whose n-th submorph should be made yellow. Would raise errors for morphs with less than n submorphs.

ActiveWorld submorphs try: [:ea | ea submorphs fifth color: Color yellow].

2. Example: Fetch the selected classes of all code browsers through the submorph interface.

| results |
results := OrderedCollection new.
ActiveWorld submorphs try: [:ea | results add: ea model selectedClass].
results explore.

=============== Diff against Collections-eem.811 ===============

Item was added:
+ ----- Method: Collection>>try: (in category 'enumerating') -----
+ try: aBlock
+ 	"Evaluate aBlock with each of the receiver's elements as the argument. On error, skip that element and continue."
+ 
+ 	^ self try: aBlock ignore: Error!

Item was added:
+ ----- Method: Collection>>try:ignore: (in category 'enumerating') -----
+ try: aBlock ignore: exceptionOrExceptionSet
+ 	"Evaluate aBlock with each of the receiver's elements as the argument. On error, skip that element and continue."
+ 
+ 	^ self
+ 		try: aBlock
+ 		ignore: exceptionOrExceptionSet
+ 		logged: false!

Item was added:
+ ----- Method: Collection>>try:ignore:logged: (in category 'enumerating') -----
+ try: aBlock ignore: exceptionOrExceptionSet logged: aBoolean
+ 	"Evaluate aBlock with each of the receiver's elements as the argument. On error, skip that element and continue."
+ 
+ 	^ self do: [:ea |
+ 		[aBlock value: ea]
+ 			on: exceptionOrExceptionSet
+ 			do: [:err | aBoolean ifTrue: [Transcript showln: err messageText]]]!