add Tuple.sum/1 & Tuple.product/1

Author: superruzafa

assets/images/functions/Tuple/product-1.2.tex

@@ -0,0 +1,4 @@
+\node (t) {\{\}};
+
+\draw [->] (t) -- +(0, -1)
+    node [below] {$1$};

assets/images/functions/Tuple/product-1.tex

@@ -0,0 +1,13 @@
+\matrix [tuple=a] {
+  \node [index=1]; & \node [separator]; &
+  \node [index=2]; & \node [separator]; &
+  \node [elements between]; & \node [separator]; &
+  \node [index=n]; \\
+};
+
+\draw [brace] (an.south east) -- (a1.south west);
+
+\draw [->] (last brace) -- +(0, -1)
+  node [below]
+  {$a_1 \cdot a_2 \cdot \dots \cdot a_n = \displaystyle\prod_{i=1}^n a_i$};
+ 

assets/images/functions/Tuple/sum-1.2.tex

@@ -0,0 +1,4 @@
+\node (t) {\{\}};
+
+\draw [->] (t) -- +(0, -1)
+    node [below] {$0$};

assets/images/functions/Tuple/sum-1.tex

@@ -0,0 +1,13 @@
+\matrix [tuple=a] {
+  \node [index=1]; & \node [separator]; &
+  \node [index=2]; & \node [separator]; &
+  \node [elements between]; & \node [separator]; &
+  \node [index=n]; \\
+};
+
+\draw [brace] (an.south east) -- (a1.south west);
+
+\draw [->] (last brace) -- +(0, -1)
+  node [below]
+  {$a_1 + a_2 + \dots + a_n = \displaystyle\sum_{i=1}^n a_i$};
+ 

content/en/functions/Tuple/product-1.md

@@ -0,0 +1,15 @@
+---
+title: product/1
+url: Tuple/product/1
+---
+
+Returns the product of all elements of `tuple`.
+
+{{< figure src="images/functions/Tuple/product-1.svg" >}}
+
+Returns 1 if `tuple` has no elements.
+
+{{< figure src="images/functions/Tuple/product-1.2.svg" >}}
+
+Raises `ArithmeticError` if enumerable contains a non-numeric value.
+

content/en/functions/Tuple/sum-1.md

@@ -0,0 +1,15 @@
+---
+title: sum/1
+url: Tuple/sum/1
+---
+
+Returns the sum of all elements of `tuple`.
+
+{{< figure src="images/functions/Tuple/sum-1.svg" >}}
+
+Returns 0 if `tuple` has no elements.
+
+{{< figure src="images/functions/Tuple/sum-1.2.svg" >}}
+
+Raises `ArithmeticError` if enumerable contains a non-numeric value.
+

data/signatures.yaml

@@ -1216,6 +1216,16 @@
         defmodule Tuple do
           def insert_at(tuple, index, value)
         end
+    - name: product/1
+      signature: |
+        defmodule Tuple do
+          def product(tuple)
+        end
+    - name: sum/1
+      signature: |
+        defmodule Tuple do
+          def sum(tuple)
+        end
     - name: to_list/1
       signature: |
         defmodule Tuple do