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ALTER TABLE without locking the table?
When doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", li...
How to host google web fonts on my own server?
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Please keep in mind that my answer has aged a lot.
There are other more technically sophisticated answers below, e.g.:
neverpanic/google-font-download
google-webfont-helper
localfont
so don't let the fact that this is the currentl...
grep using a character vector with multiple patterns
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In addition to @Marek's comment about not including fixed==TRUE, you also need to not have the spaces in your regular expression. It should be "A1|A9|A6".
You also mention that there are lots of patterns. Assuming that they are in a vector
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How do I view the type of a scala expression in IntelliJ
...type Alt + =.
If you want to change the shortcut go to Preferences > Keymap and enter "Type Info" in the search field.
In older versions, it's Shift + Ctrl + Alt + T.
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Using git commit -a with vim
...he file and exit vim. This is also easier for some people as it's the same key pressed twice.
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How do you install Boost on MacOS?
...ts over brew, with brew anyone can slap some shit formula together and break a lot of libraries.
– μολὼν.λαβέ
Aug 17 '17 at 19:58
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Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds
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iPhone format strings are in Unicode format. Behind the link is a table explaining what all the letters above mean so you can build your own.
And of course don't forget to release your date formatters when you're done with them. The above code leaks format, now, and inFormat.
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Selecting multiple columns in a pandas dataframe
I have data in different columns but I don't know how to extract it to save it in another variable.
18 Answers
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How do I write output in same place on the console?
...ited Nov 19 '12 at 12:01
UdayaLakmal
3,32744 gold badges2424 silver badges3939 bronze badges
answered Feb 5 '09 at 18:22
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How to convert timestamps to dates in Bash?
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a'ra'r
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