add: comment for reference

ashokdey · web-flow · commit a1ad2ca2e661 · 2020-04-27T20:37:04.000+05:30
diff --git a/src/_DataStructures_/BloomFilters/index.js b/src/_DataStructures_/BloomFilters/index.js
@@ -37,6 +37,7 @@ class BloomFilters {
     }
 
     // eslint-disable-next-line no-bitwise
+    // To get a better hash. It may look useless but here is the explanation: https://stackoverflow.com/questions/38356644/why-is-the-bitwise-and-of-two-of-the-same-value-producing-a-different-value
     hashVal &= hashVal;
 
     return Math.abs(hashVal % this.size);

Original file line number	Diff line number	Diff line change
`@@ -37,6 +37,7 @@ class BloomFilters {`
`37`	`37`	`}`
`38`	`38`
`39`	`39`	`// eslint-disable-next-line no-bitwise`
	`40`	`+ // To get a better hash. It may look useless but here is the explanation: https://stackoverflow.com/questions/38356644/why-is-the-bitwise-and-of-two-of-the-same-value-producing-a-different-value`
`40`	`41`	`hashVal &= hashVal;`
`41`	`42`
`42`	`43`	`return Math.abs(hashVal % this.size);`