Databases
StackOverflow2013
Postsdbo
POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
    primarykey
    data
    text
    <p>Consider this markup:</p> <pre><code>&lt;div class="click"&gt;click&lt;/div&gt; &lt;div class="container"&gt; &lt;div&gt; &lt;div data-attr="color"&gt;blue&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt;&lt;!-- this is the only n-th child div to be red --&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="click"&gt;click&lt;/div&gt; &lt;div class="container"&gt; &lt;div&gt; &lt;div data-attr="color"&gt;blue&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt;&lt;!-- this is the only n-th child div to be red --&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>and this script:</p> <pre><code>&lt;script&gt; $(document).ready(function () { $('.click').click(function () { $('.container div').each(function (i) { if ($(this).attr('data-attr') == "color" &amp;&amp; $(this).html() == "red" &amp;&amp; $(this).prevUntil('.container').filter(function (i) { return $(this).attr('data-attr') == "color" &amp;&amp; $(this).html() == "red" }).length == 0) { $(this).css('color', 'red'); } }); }); }); &lt;/script&gt; </code></pre> <p>That is, I want matching element to be red only if it's first. My problem is I'm restricted to use a script of another structure, so only <code>ThisIsFirstInsideItsClosestParentContainer</code> part within <code>if()</code> must be rewritten, and the rest part of this script must stay intact.</p> <pre><code>&lt;script&gt; $(document).ready(function () { $('.click').click(function () { $('div').filter(function (i) { return $(this).attr('data-attr') == "color" &amp;&amp; $(this).html() == "red" }).each(function (i) { if (ThisIsFirstInsideItsClosestParentContainer) { $(this).css('color', 'red'); } }); }); }); &lt;/script&gt; </code></pre> <p>Besides, I strongly dislike the use of prevUntil() in my case, but I haven't found another way. So, what's that <code>ThisIsFirstInsideItsClosestParentContainer</code> should look like, without using prevUntil()?</p> <p><strong>EDIT</strong><br> Please, tell my why this doesn't work</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript"&gt; $(document).ready(function () { $('.click').click(function () { $('.container [data-attr]').filter(function (i) { return $(this).attr('data-attr') == "color" &amp;&amp; $(this).html() == "red" }).each(function (i) { if ($(this).index() == 0) { $(this).css('color', 'red'); } }); }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div class="click"&gt;click&lt;/div&gt; &lt;div class="container"&gt; &lt;div&gt; &lt;div data-attr="color"&gt;blue&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt;&lt;!-- this is the only n-th child div to be red --&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="click"&gt;click&lt;/div&gt; &lt;div class="container"&gt; &lt;div&gt; &lt;div data-attr="color"&gt;blue&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt;&lt;!-- this is the only n-th child div to be red --&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;div data-attr="color"&gt;red&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USlyrically wicked
    1. USlyrically wicked
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COIt would be more readable if you break up things in blocks. Assign all your conditions to variables and make `if` statement shorter and more obvious. I get lost when I've to scroll sideways and keep remembering why is this here and having to look back.
      singulars
      1. POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
      1. USelclanrs
    2. COSomething like this? http://jsfiddle.net/5Ps5C/
      singulars
      1. POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
      1. USundefined
    3. CO@undefined `if ($(this)...is(this))`? Cool, works, maybe looks too unusual. :) Why did you choose `closest`, not `parents`?
      singulars
      1. POhow to check if an element that satisfies my conditions is the first one of a kind inside its container?
      1. USlyrically wicked
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload