Data commit

Task/Arrays/Groovy/arrays-1.groovy

@@ -0,0 +1,20 @@
+def aa = [ 1, 25, 31, -3 ]           // list
+def a = [0] * 100                    // list of 100 zeroes
+def b = 1..9                         // range notation
+def c = (1..10).collect { 2.0**it }  // each output element is 2**(corresponding invoking list element)
+
+// There are no true "multi-dimensional" arrays in Groovy (as in most C-derived languages).
+// Use lists of lists in natural ("row major") order as a stand in.
+def d = (0..1).collect { i -> (1..5).collect { j -> 2**(5*i+j) as double } }
+def e = [ [  1.0,  2.0,  3.0,  4.0 ],
+          [  5.0,  6.0,  7.0,  8.0 ],
+          [  9.0, 10.0, 11.0, 12.0 ],
+          [ 13.0, 14.0, 15.0, 16.0 ] ]
+
+println aa
+println b
+println c
+println()
+d.each { print "["; it.each { elt -> printf "%7.1f ", elt }; println "]" }
+println()
+e.each { print "["; it.each { elt -> printf "%7.1f ", elt }; println "]" }

Task/Arrays/Groovy/arrays-2.groovy

@@ -0,0 +1,3 @@
+def identity = { n ->
+   (1..n).collect { i -> (1..n).collect { j -> i==j ? 1.0 : 0.0 } }
+}

Task/Arrays/Groovy/arrays-3.groovy

@@ -0,0 +1,7 @@
+def i2 = identity(2)
+def i15 = identity(15)
+
+
+i2.each { print "["; it.each { elt -> printf "%4.1f ", elt }; println "]" }
+println()
+i15.each { print "["; it.each { elt -> printf "%4.1f ", elt }; println "]" }

Task/Arrays/Groovy/arrays-4.groovy

@@ -0,0 +1,11 @@
+def strings = ['Mary', 'had', 'a', 'little', 'lamb', ". It's", 'fleece', 'was', 'white', 'as', 'snow']
+
+println strings
+
+strings[0] = 'Arthur'
+strings[4] = 'towel'
+strings[6] = 'stain'
+strings[8] = 'ripe'
+strings[10] = 'strawberries'
+
+println strings

Task/Arrays/Groovy/arrays-5.groovy

@@ -0,0 +1 @@
+println strings[-1]

Task/Arrays/Groovy/arrays-6.groovy

@@ -0,0 +1,3 @@
+println strings[0, 7, 2, 3, 8]
+println strings[0..4]
+println strings[0..3, -5]