[Sync Iteration] go/card-tricks/1

solutions/go/card-tricks/1/card_tricks.go

@@ -0,0 +1,49 @@
+package cards
+
+// FavoriteCards returns a slice with the cards 2, 6 and 9 in that order.
+func FavoriteCards() []int {
+	s:= []int{2,6,9}
+	return s
+}
+
+// GetItem retrieves an item from a slice at given position.
+// If the index is out of range, we want it to return -1.
+func GetItem(slice []int, index int) int {
+    if index > len(slice) || index < 0 {
+        return -1
+    } else{
+	return slice[index]
+    }
+}
+
+// SetItem writes an item to a slice at given position overwriting an existing value.
+// If the index is out of range the value needs to be appended.
+func SetItem(slice []int, index, value int) []int {
+   if index < 0 || index >= len(slice) {
+        slice = append(slice, value)
+        return slice
+    } else{   
+        slice[index] = value
+        return  slice
+    }
+}
+
+// PrependItems adds an arbitrary number of values at the front of a slice.
+func PrependItems(slice []int, values ...int) []int {
+	if len(values) > 0 {
+		slice = append(values, slice...)
+        return slice
+    }
+    return slice
+}
+
+// RemoveItem removes an item from a slice by modifying the existing slice.
+func RemoveItem(slice []int, index int) []int {
+	if index < 0 || index >= len(slice){
+        return slice
+    }
+    pt1 := slice[index + 1:]
+	pt2 := slice[:index]
+	slice = append(pt2,pt1...)
+	return slice
+}