tasks a-s

Task/SEDOLs/Smalltalk/sedols-1.st

@@ -0,0 +1,6 @@
+String extend [
+  includesAnyOf: aSet [
+      aSet do: [ :e | (self includes: e) ifTrue: [ ^true ] ].
+      ^false
+  ]
+].

Task/SEDOLs/Smalltalk/sedols-2.st

@@ -0,0 +1,43 @@
+Object subclass: SEDOL [
+  |weight charList|
+
+  initialize [
+    weight := Array from: { 1. 3. 1. 7. 3. 9 }.
+    charList :=
+      ('ABCDEFGHIJKLMNOPQRSTUVWXYZ' asOrderedCollection)
+      collect: [ :c | ('AEIOU' includes: c) ifTrue: [ nil ] ifFalse: [ c ] ].
+  ]
+
+  SEDOL class >> new [
+     ^ (self basicNew) initialize
+  ]
+
+  "to be considered private"
+  blindCheckDigit: aSEDOL [ |sum|
+     sum := 0.
+     aSEDOL keysAndValuesDo: [ :i :c |
+        ('0123456789' includes: c)
+          ifTrue: [  sum := sum +
+                            ((weight at: i) *
+                            (Number readFrom: (c asString readStream))).
+                  ]
+          ifFalse: [ sum := sum + (((charList indexOf: c) + 9) *
+                            (weight at: i))
+                   ]
+     ].
+     ^ ((10 - (sum rem: 10)) rem: 10) displayString
+  ]
+
+  checked: aSEDOL [
+     (aSEDOL size < 6) |
+     (aSEDOL size > 7) |
+     (aSEDOL asUppercase includesAnyOf: 'AEIOU' asSet )
+     ifTrue: [ SystemExceptions.InvalidArgument
+                 signalOn: aSEDOL
+                 reason: 'Not a valid SEDOL'
+             ]
+     ifFalse: [ |t| t := aSEDOL copyFrom: 1 to: 6.
+                ^ t , (self blindCheckDigit: t)
+              ]
+  ]
+].

Task/SEDOLs/Smalltalk/sedols-3.st

@@ -0,0 +1,12 @@
+|sedol|
+sedol := SEDOL new.
+{  '710889'.
+   'B0YBKJ'.
+   '406566'.
+   'B0YBLH'.
+   '228276'.
+   'B0YBKL'.
+   '557910'.
+   'B0YBKR'.
+   '585284'.
+   'B0YBKT' } do: [ :c | (sedol checked: c) displayNl ]