client side data models

shared/utils/array.js

@@ -0,0 +1,30 @@
+class ArrayUtil {
+
+  static diff(a1, a2){
+    a1.filter((a1n)=>{ return a2.indexOf(a1n) < 0; });
+  }
+
+  static selectMap(a, fnSelect, fnMap){
+    var map = [];
+    for (var elem of a){
+      if (fnSelect(elem)){
+        map.push(fnMap(elem));
+      }
+    }
+    return map;
+  }
+
+  static all(a, fnCondition){
+    var all = true;
+    for (var elem of a){
+      if (!fnCondition(elem)){
+        all = false;
+        break;
+      }
+    }
+    return all;
+  }
+
+}
+
+export default ArrayUtil;