Initial data commit

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-1.js

@@ -0,0 +1,12 @@
+function mean(array)
+{
+ var sum = 0, i;
+ for (i = 0; i < array.length; i++)
+ {
+  sum += array[i];
+ }
+  return array.length ? sum / array.length : 0;
+}
+
+alert( mean( [1,2,3,4,5] ) );   // 3
+alert( mean( [] ) );            // 0

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-2.js

@@ -0,0 +1,9 @@
+function mean(array) {
+    var sum = 0;
+    array.forEach(function(value){
+        sum += value;
+        });
+    return array.length ? sum / array.length : 0;
+    }
+
+alert( mean( [1,2,3,4,5] ) );   // 3

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-3.js

@@ -0,0 +1,9 @@
+function mean(array) {
+    return !array.length ? 0
+        : array.reduce(function(pre, cur, i) {
+            return (pre * i + cur) / (i + 1);
+            });
+    }
+
+alert( mean( [1,2,3,4,5] ) );   // 3
+alert( mean( [] ) );            // 0

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-4.js

@@ -0,0 +1,9 @@
+Array.prototype.mean = function() {
+    return !this.length ? 0
+        : this.reduce(function(pre, cur, i) {
+            return (pre * i + cur) / (i + 1);
+            });
+    }
+
+alert( [1,2,3,4,5].mean() );   // 3
+alert( [].mean() );            // 0

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-5.js

@@ -0,0 +1,4 @@
+function mean(a)
+{
+ return a.length ? Functional.reduce('+', 0, a) / a.length : 0;
+}

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-6.js

@@ -0,0 +1,14 @@
+(sample => {
+
+    // mean :: [Num] => (Num | NaN)
+    let mean = lst => {
+        let lng = lst.length;
+
+        return lng ? (
+            lst.reduce((a, b) => a + b, 0) / lng
+        ) : NaN;
+    };
+
+    return mean(sample);
+
+})([1, 2, 3, 4, 5, 6, 7, 8, 9]);

Task/Averages-Arithmetic-mean/JavaScript/averages-arithmetic-mean-7.js

@@ -0,0 +1 @@
+5