removed lodash

front/js/helpers.js

@@ -1,18 +1,18 @@
-import {formatDistanceToNow, parseJSON, format, parse} from "date-fns";
+import {format, formatDistanceToNow, parseJSON} from "date-fns";
 
 export function friendlyDate(date) {
     return formatDistanceToNow(parseJSON(date), {addSuffix: true});
 }
 
 export function readableDate(date) {
-    if(!date){
+    if (!date) {
         return "";
     }
     return format(parseJSON(date), "dd MMM yyyy");
 }
 
 export function readableDatetime(date) {
-    if(!date){
+    if (!date) {
         return "";
     }
 
@@ -50,3 +50,19 @@ export function clickOutside(node) {
     }
 }
 
+export function uniqueBy(list, callback) {
+    const itemMap = list.reduce((c, item) => {
+        c[callback(item)] = item;
+        return c;
+    }, {});
+
+    return Object.values(itemMap);
+}
+
+export function range(start, end) {
+    var ans = [];
+    for (let i = start; i <= end; i++) {
+        ans.push(i);
+    }
+    return ans;
+}