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MongoDB: Is it possible to make a case-insensitive query?
... incurring the extra cost every time you find it. Obviously this wont work for people's names and such, but maybe use-cases like tags.
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Should I commit or rollback a read transaction?
...on implicit rollback - while perhaps technically equivalent - is just poor form.
If that hasn't convinced you, just imagine the next guy who inserts an update statement in the middle of your code, and has to track down the implicit rollback that occurs and removes his data.
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How to get notified about changes of the history via history.pushState?
...gating to a session history entry.
According to this, there is no reason for popstate to be fired when you use pushState. But an event such as pushstate would come in handy. Because history is a host object, you should be careful with it, but Firefox seems to be nice in this case. This code works ...
Is an anchor tag without the href attribute safe?
... a "placeholder hyperlink."
Example:
<a>previous</a>
Look for "placeholder hyperlink" on the w3c anchor tag reference page: https://www.w3.org/TR/2016/REC-html51-20161101/textlevel-semantics.html#the-a-element.
And it is also mentioned on the wiki here:
https://www.w3.org/wiki/Ele...
submit a form in a new tab
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<form target="_blank" [....]
will submit the form in a new tab... I am not sure if is this what you are looking for, please explain better...
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How to debug PDO database queries?
Before moving to PDO, I created SQL queries in PHP by concatenating strings. If I got database syntax error, I could just echo the final SQL query string, try it myself on the database, and tweak it until I fixed the error, then put that back into the code.
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Rename package in Android Studio
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In Android Studio, you can do this:
For example, if you want to change com.example.app to my.awesome.game, then:
In your Project pane, click on the little gear icon ( )
Uncheck / De-select the Compact Empty Middle Packages option
Your package directory wil...
Margin on child element moves parent element
...equest:
The whole point of collapsing margins is handling textual content. For example:
h1, h2, p, ul {
margin-top: 1em;
margin-bottom: 1em;
}
<h1>Title!</h1>
<div class="text">
<h2>Title!</h2>
<p>Paragraph</p>
</div>
<div clas...
How do I convert a column of text URLs into active hyperlinks in Excel?
...a new column alongside your column of URLs.
In the new column type in the formula =HYPERLINK(A1) (replacing A1 with whatever cell you are interested in). Then copy the formula down the rest of the 200 entries.
NOTE: This solution does not work if the cell A1 contains a string longer than 255 chara...
What is a simple command line program or script to backup SQL server databases?
I've been too lax with performing DB backups on our internal servers.
11 Answers
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