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+~~~ javascript
+const arr = [ 2, 28, 9, 1, 15 ];
+const arrBis = [ -5, 13, 26, 18, 12 ];
+
+// Test function
+const isPositive = (number) => number > 0;
+
+// Test if every element of array match the isPositive function
+arr.every(isPositive); // -> true
+arrBis.every(isPositive); // -> false
+
+// Test if some element of array match isPositive function
+arr.some(isPositive); // -> true
+arrBis.some(isPositive); // -> true
+~~~