Pastable version of Show a default value if object or field is empty?

<div style="overflow:auto;border:solid 1px #ccc;background:#000;color:#F8F8F8">
          <div class="section">
            
            <pre style="float:left;margin:0 10px;border-right:0;color:#666;">1
2
3
4
5
6
7
8
9
10
11
12
13
14</pre>
            <pre class="sunburst"><span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> this method returns a default when the object does not exist or the value given in the block does not exist.</span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span></span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> Example:</span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> user = User.find(:first)</span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> user2 = nil</span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> </span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> show_value_or_default(user)         {|user| user.phone} -&gt; 'phonenumber of user' or '-' of phone is nil or ''.</span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> show_value_or_default(user2,&quot;leeg&quot;) {|user| user.phone} -&gt; 'leeg'</span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> </span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> show_value_or_default(user) {|user| i18n(user.gender)} -&gt; i18n version of the gender. </span>
<span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">#</span> </span>
<span style="color:#E28964;">def</span> <span style="color:#89BDFF;">show_value_or_default</span>(<span style="color:#3E87E3;">object<span style="color:#3E87E3;">,</span> default <span style="color:#E28964;">=</span> <span style="color:#65B042;"><span style="color:#65B042;">&quot;</span>-<span style="color:#65B042;">&quot;</span></span></span>)
    (object.<span style="color:#89BDFF;">nil?</span> <span style="color:#E28964;">or</span> <span style="color:#E28964;">yield</span>(object).<span style="color:#89BDFF;">blank?</span>) <span style="color:#E28964;">?</span> default : <span style="color:#E28964;">yield</span>(object)
<span style="color:#E28964;">end</span>
</pre>
          </div>
        </div>

<a href="http://refactormycode.com/codes/50-show-a-default-value-if-object-or-field-is-empty" style="color:#fff" title="As seen on RefactorMyCode.com"><img alt="Small_logo" src="http://refactormycode.com/images/small_logo.gif" style="border:0" /></a>

counter free hit invisible