Add runExpreesion function

Author: magicops

demo/index.js

@@ -61,7 +61,7 @@ $(function () {
     setTimeout(function () {
       let txtExp = $('#txt').expressionBuilder();
       let exp = txtExp.getExpression();
-      $('.res-1-1').html("Expression: " + exp);
+      $('.res-1-1').html("Expression: " + exp + " = " + txtExp.runExpression());
 
       let input = txtExp.getInput();
       $('.res-1-2').html("Input: " + input);

demo/index.js.map

@@ -28,7 +28,8 @@ interface ExpressionBuilder {
   parseExpression(expression: string): string,
   getInput(): string,
   getVariableById(variableId: number): string,
-  setVariables(vars: Array<ExpressionBuilderVariable>): void
+  setVariables(vars: Array<ExpressionBuilderVariable>): void,
+  runExpression(): any
 }
 
 interface JQuery {
@@ -1046,8 +1047,6 @@ jQuery.fn.extend({
           return undefined;
 
         return tree.toString(true);
-
-        //return parseInput().expression;
       },
 
       setExpression: function (expression: string): void {
@@ -1072,6 +1071,20 @@ jQuery.fn.extend({
 
       setVariables: function (vars: Array<ExpressionBuilderVariable>) {
         options.variables = vars || [];
+      },
+
+      runExpression: function () {
+        let p = parser(expressionInput.val(), parserOptions);
+
+        if (p.validate() != '')
+          return undefined;
+
+        let tree = p.getExpressionTree();
+
+        if (tree === undefined)
+          return undefined;
+
+        return tree.compute();
       }
     };
   }