diff --git a/src/core/operations/Entropy.js b/src/core/operations/Entropy.js
index e7ad3028..3451914d 100755
--- a/src/core/operations/Entropy.js
+++ b/src/core/operations/Entropy.js
@@ -88,17 +88,12 @@ const Entropy = {
     runFreqDistrib: function (input, args) {
         if (!input.length) return "No data";
 
-        let distrib = new Array(256),
+        let distrib = new Array(256).fill(0),
             percentages = new Array(256),
             len = input.length,
             showZeroes = args[0],
             i;
 
-        // Initialise distrib to 0
-        for (i = 0; i < 256; i++) {
-            distrib[i] = 0;
-        }
-
         // Count bytes
         for (i = 0; i < len; i++) {
             distrib[input[i]]++;
diff --git a/src/core/operations/IP.js b/src/core/operations/IP.js
index 603a495c..8a852789 100755
--- a/src/core/operations/IP.js
+++ b/src/core/operations/IP.js
@@ -713,13 +713,9 @@ const IP = {
             ip2 = IP._strToIpv6(range[14]);
 
         let t = "",
-            total = new Array(128),
+            total = new Array(128).fill(),
             i;
 
-        // Initialise total array to "0"
-        for (i = 0; i < 128; i++)
-            total[i] = "0";
-
         for (i = 0; i < 8; i++) {
             t = (ip2[i] - ip1[i]).toString(2);
             if (t !== "0") {
diff --git a/src/core/operations/StrUtils.js b/src/core/operations/StrUtils.js
index 6d9a5114..4203efa6 100755
--- a/src/core/operations/StrUtils.js
+++ b/src/core/operations/StrUtils.js
@@ -397,9 +397,7 @@ const StrUtils = {
         }
 
         // Initialise output strings
-        for (s = 0; s < samples.length; s++) {
-            outputs[s] = "";
-        }
+        outputs.fill("", 0, samples.length);
 
         // Loop through each character in the first sample
         for (i = 0; i < samples[0].length; i++) {