Add logic functions

desktop/sources/scripts/library.js

@@ -28,7 +28,40 @@ function Library (ronin) {
     console.log(...args)
   }
 
+  // Logic
+
+  this.gt = (a, b) => {
+    return a > b
+  }
+
+  this.lt = (a, b) => {
+    return a < b
+  }
+
+  this.eq = (a, b) => {
+    return a === b
+  }
+
+  this.and = (...args) => {
+    for (let i = 0; i < args.length; i++) {
+      if (!args[i]) {
+        return args[i]
+      }
+    }
+    return args[args.length - 1]
+  }
+
+  this.or = (...args) => {
+    for (let i = 0; i < args.length; i++) {
+      if (args[i]) {
+        return args[i]
+      }
+    }
+    return args[args.length - 1]
+  }
+
   // Arrays
+
   this.map = (fn, arr) => {
     return arr.map(fn)
   }