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What is the difference between pluck and collect in Rails?
...ils 4, use pluck: User.first.gifts.pluck(:id, :name, ...)
if you only need one field with Rails 3, use pluck: User.first.gifts.pluck(:id)
if you need all fields, use collect
if you need some fields with Rails 4, still use pluck
if you need some fields with Rails 3, use selectand collect
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What exactly does the Access-Control-Allow-Credentials header do?
...MLHttpRequest to true in order to give permission.
However, this header alone is not enough. The server must respond with the Access-Control-Allow-Credentials header. Responding with this header to true means that the server allows cookies (or other user credentials) to be included on cross-origin ...
How can I convince IE to simply display application/json rather than offer to download it?
...
If you want to skip creating the registry file, here's a one-liner you can paste into a powershell window: reg add "HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/json" /t REG_SZ /d "{25336920-03F9-11cf-8FD0-00AA00686F13}"; reg add "HKEY_CLASSES_ROOT\MIME\Database\Content...
Using :after to clear floating elements
...enough to do something like this:
<ul class="clearfix">
<li>one</li>
<li>two></li>
</ul>
And the following CSS:
ul li {float: left;}
.clearfix:after {
content: ".";
display: block;
clear: both;
visibility: hidden;
line-height: 0;
height: 0...
How do I compare version numbers in Python?
... versions of the same .egg in the directory, I want to add only the latest one.
10 Answers
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How to align texts inside of an input?
...l the inputs of the page.
Otherwise, if you want to align the text of just one input, set the style inline:
<input type="text" style="text-align:right;"/>
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How can I get a JavaScript stack trace when I throw an exception?
...le.log(e.stack);
}
It applies for the base exceptions as well as for the ones you throw yourself. (Considered that you use the Error class, which is anyway a good practice).
See details on V8 documentation
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How can I edit a view using phpMyAdmin 3.2.4?
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To expand one what CheeseConQueso is saying, here are the entire steps to update a view using PHPMyAdmin:
Run the following query: SHOW CREATE VIEW your_view_name
Expand the options and choose Full Texts
Press Go
Copy entire contents...
Determine when a ViewPager changes pages
... As mViewPager.setOnPageChangeListener(); is deprecated now, this one is working fine.
– BST Kaal
Nov 23 '15 at 7:09
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What is PAGEIOLATCH_SH wait type in SQL Server?
...t you have a composite index on (col1, col_primary_key).
If you don't have one, then you'll need either a full INDEX SCAN if the PRIMARY KEY is chosen, or a SORT if an index on col1 is chosen.
Both of them are very disk I/O consuming operations on large tables.
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