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What's the safest way to iterate through the keys of a Perl hash?
...h of (key, value) pairs, what is the preferred method of iterating through all the keys? I have heard that using each may in some way have unintended side effects. So, is that true, and is one of the two following methods best, or is there a better way?
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What does the “+” (plus sign) CSS selector mean?
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So essentially in your example it will match the first <p> after <h1>, but would it also match that same <p> if it came before <h1>? Or is it only after?
– Vincent
Jan 2 '...
How do I get list of all tables in a database using TSQL?
What is the best way to get the names of all of the tables in a specific database on SQL Server?
17 Answers
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Mercurial undo last commit
How can I undo my last accidentally commited (not pushed) change in Mercurial?
7 Answers
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Change Git repository directory location.
...o I need to do to move the repo files to C:\dir1 ? I can obviously physically copy and paste the files, but what do I need to do on the Git side?
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Android Replace “…” with ellipsis character
...'t break ("..." might wrap around on e.g. the second period), and theoretically languages could render them differently (many asian languages put them in the middle and they're wider (matches a character width)). Non-breaking is useful everywhere, I'm not aware of Android rendering them correctly i...
Does the APNS device token ever change, once created?
...hat device.
If the user restores backup data to a new device or reinstalls the
operating system, the device token changes.
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Reverting to a specific commit based on commit id with Git? [duplicate]
...ou can add "tags" to your repo.. and then go back to a tag. But a tag is really just a shortcut to the sha1.
You can tag this as TAG1.. then a git reset --soft c14809fa, git reset --soft TAG1, or git reset --soft c14809fafb08b9e96ff2879999ba8c807d10fb07 would all do the same thing.
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Notepad++ Setting for Disabling Auto-open Previous Files
...on a file I had previously opened; I was unable to open the application at all. This blog post discusses how to delete the data from the "Sessions" file so that Notepad++ will open without having any prior files open:
From the blog post:
Method 1 - edit session.xml
Open file session.xm...
SQL - HAVING vs. WHERE
...erage, min, max, or sum, has been produced from multiple rows. Your query calls for a second kind of condition (i.e. a condition on an aggregation) hence HAVING works correctly.
As a rule of thumb, use WHERE before GROUP BY and HAVING after GROUP BY. It is a rather primitive rule, but it is useful ...