diff --git a/app/static/js/CorpusList.js b/app/static/js/CorpusList.js
index 7da3da97..5bfbe09e 100644
--- a/app/static/js/CorpusList.js
+++ b/app/static/js/CorpusList.js
@@ -19,6 +19,7 @@ class CorpusList extends List {
     var item, operation, pathArray, valueName;
 
     for (operation of patch) {
+      /* "/corpusId/valueName" -> ["corpusId", "valueName"] */
       pathArray = operation.path.split("/").slice(1);
       switch(operation.op) {
         case "add":
@@ -27,12 +28,10 @@ class CorpusList extends List {
           List.updatePagination(this);
           break;
         case "remove":
-          if (pathArray.length != 1) {break;}
           this.remove("id", pathArray[0]);
           List.updatePagination(this);
           break;
         case "replace":
-          if (pathArray.length != 2) {break;}
           item = this.get("id", pathArray[0])[0];
           valueName = pathArray[1];
           switch(valueName) {
diff --git a/app/static/js/JobList.js b/app/static/js/JobList.js
index 745c98cf..215bde3e 100644
--- a/app/static/js/JobList.js
+++ b/app/static/js/JobList.js
@@ -20,6 +20,7 @@ class JobList extends List {
         statusColor, valueName;
 
     for (operation of patch) {
+      /* "/jobId/valueName" -> ["jobId", "valueName"] */
       pathArray = operation.path.split("/").slice(1);
       switch(operation.op) {
         case "add":
@@ -28,12 +29,10 @@ class JobList extends List {
           List.updatePagination(this);
           break;
         case "remove":
-          if (pathArray.length != 1) {break;}
           this.remove("id", pathArray[0]);
           List.updatePagination(this);
           break;
         case "replace":
-          if (pathArray.length != 2) {break;}
           item = this.get("id", pathArray[0])[0];
           valueName = pathArray[1];
           switch(valueName) {
@@ -43,16 +42,8 @@ class JobList extends List {
             case "status":
               jobStatusElement = item.elm.querySelector(".status");
               status = jobStatusElement.innerHTML;
-              if (JobList.STATUS_COLORS.hasOwnProperty(status)) {
-                statusColor = JobList.STATUS_COLORS[status];
-              } else {
-                statusColor = JobList.STATUS_COLORS['default'];
-              }
-              if (JobList.STATUS_COLORS.hasOwnProperty(operation.value)) {
-                newStatusColor = JobList.STATUS_COLORS[operation.value];
-              } else {
-                newStatusColor = JobList.STATUS_COLORS['default'];
-              }
+              statusColor = JobList.STATUS_COLORS[status] || JobList.STATUS_COLORS['default'];
+              newStatusColor = JobList.STATUS_COLORS[operation.value] || JobList.STATUS_COLORS['default'];
               jobStatusElement.classList.remove(statusColor);
               jobStatusElement.classList.add(newStatusColor);
               jobStatusElement.innerHTML = operation.value;
@@ -81,24 +72,12 @@ class JobList extends List {
     jobElement.classList.add("avatar", "collection-item");
     jobElement.dataset.id = job.id;
     jobElement.href = `/jobs/${job.id}`;
-    if (JobList.SERVICE_COLORS.hasOwnProperty(job.service)) {
-      serviceColor = JobList.SERVICE_COLORS[job.service];
-    } else {
-      serviceColor = JobList.SERVICE_COLORS['default'];
-    }
-    if (JobList.SERVICE_ICONS.hasOwnProperty(job.service)) {
-      serviceIcon = JobList.SERVICE_ICONS[job.service];
-    } else {
-      serviceIcon = JobList.SERVICE_ICONS['default'];
-    }
+    serviceColor = JobList.SERVICE_COLORS[job.service] || JobList.SERVICE_COLORS['default'];
+    serviceIcon = JobList.SERVICE_ICONS[job.service] || JobList.SERVICE_ICONS['default'];
     jobServiceElement = document.createElement("i");
     jobServiceElement.classList.add("circle", "material-icons", "service-icon", serviceColor);
     jobServiceElement.innerText = serviceIcon;
-    if (JobList.STATUS_COLORS.hasOwnProperty(job.status)) {
-      statusColor = JobList.STATUS_COLORS[job.status];
-    } else {
-      statusColor = JobList.STATUS_COLORS['default'];
-    }
+    statusColor = JobList.STATUS_COLORS[job.status] || JobList.STATUS_COLORS['default'];
     jobStatusElement = document.createElement("span");
     jobStatusElement.classList.add("badge", "new", "status", statusColor);
     jobStatusElement.dataset.badgeCaption = "";
@@ -114,9 +93,7 @@ class JobList extends List {
 
     this.add(
       [{description: job.description, id: job.id, title: job.title}],
-      (items) => {
-        items[0].elm = jobElement;
-      }
+      function(items) {items[0].elm = jobElement;}
     );
   }
 }