angular.scope.$eval.html

<h1>angular.scope.$eval</h1>
<fieldset class="workInProgress"><legend>Work in Progress</legend>
This page is currently being revised. It might be incomplete or contain inaccuracies.</fieldset>
<h2>Description</h2>
<p>Without the <code>exp</code> parameter triggers an eval cycle, for this scope and it's child scopes.</p>

<p>With the <code>exp</code> parameter, compiles the expression to a function and calls it with <code>this</code> set
to the current scope and returns the result.</p>

<h3>Example</h3><div ng:non-bindable><pre class="brush: js; html-script: true;">
         var scope = angular.scope();
         scope.a = 1;
         scope.b = 2;

         expect(scope.$eval('a+b')).toEqual(3);
         expect(scope.$eval(function(){ return this.a + this.b; })).toEqual(3);

         scope.$onEval('sum = a+b');
         expect(scope.sum).toEqual(undefined);
         scope.$eval();
         expect(scope.sum).toEqual(3);
       </pre></div><h2>Usage</h2>
<div ng:non-bindable=""><pre class="brush: js; html-script: true;">angular.scope.$eval(exp);</pre>
</div>
<h3>Parameters</h3>
<ul class="parameters"><li><code ng:non-bindable="">exp<i>(optional)</i> – {(string|function())} – </code>
An angular expression to be compiled to a function or a js
    function.</li>
</ul>
<h3>Returns</h3>
<code ng:non-bindable="">*</code>
– The result of calling compiled <code>exp</code> with <code>this</code> set to the current scope.