Data commit

Task/Display-a-linear-combination/Sidef/display-a-linear-combination.sidef

@@ -0,0 +1,38 @@
+func linear_combination(coeffs) {
+    var res = ""
+    for e,f in (coeffs.kv) {
+        given(f) {
+            when (1) {
+                res += "+e(#{e+1})"
+            }
+            when (-1) {
+                res += "-e(#{e+1})"
+            }
+            case (.> 0) {
+                res += "+#{f}*e(#{e+1})"
+            }
+            case (.< 0) {
+                res += "#{f}*e(#{e+1})"
+            }
+        }
+    }
+    res -= /^\+/
+    res || 0
+}
+
+var tests = [
+    %n{1 2 3},
+    %n{0 1 2 3},
+    %n{1 0 3 4},
+    %n{1 2 0},
+    %n{0 0 0},
+    %n{0},
+    %n{1 1 1},
+    %n{-1 -1 -1},
+    %n{-1 -2 0 -3},
+    %n{-1},
+]
+
+tests.each { |t|
+    printf("%10s -> %-10s\n", t.join(' '), linear_combination(t))
+}