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UPDATE multiple tables in MySQL using LEFT JOIN
... (
SELECT id
FROM t2
)
See the article in my blog for performance details:
Finding incomplete orders: performance of LEFT JOIN compared to NOT IN
Unfortunately, MySQL does not allow using the target table in a subquery in an UPDATE statement, that's why you'll ne...
Delete text in between HTML tags in vim?
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I used to use command like c/<[enter] a lot, in my "Vim life", but now I'm a bit regretful about that. You see, most of "Vi-mode" plugins for popular other editors/IDEs do not support this specific type of command. They support cit, ci", ct<and however. So, I'm re-teach...
Read whole ASCII file into C++ std::string [duplicate]
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Important note for some, at least on my implementation, the three-liner works at least as good as the C fopen alternative for files under 50KB. Past that, it seems to lose performance fast. In which case, just use the second solution.
– dec...
Difference between Django's annotate and aggregate methods?
...ated to the current question asked. Sorry for that Actually I have used on my code.
– Vinay Kumar
Apr 8 at 13:48
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How to create a new java.io.File in memory?
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"It's not possible" would be a valid answer in my opinion. However i think that an in-memory filesystem (mentioned in the comments of Andreas’ answer) could also be mentioned, because if you cant for some reason write to the hard-drive, then that could be a way around i...
Comparing strings with == which are declared final in Java
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As per my research, all the final String are interned in Java. From one of the blog post:
So, if you really need to compare two String using == or != make sure you call String.intern() method before making comparison. Otherwise,...
how to check redis instance version?
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@markthegrea valid point, I updated my answer since some people didn't see the advantage.
– Ofer Zelig
Feb 3 '19 at 0:41
3
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What's the difference between “git reset” and “git checkout”?
... have git reset.
Thinkeye mentions in the comments the article "Reset Demystified ".
For instance, if we have two branches, 'master' and 'develop' pointing at different commits, and we're currently on 'develop' (so HEAD points to it) and we run git reset master, 'develop' itself will now poin...
Django - limiting query results
...pecifically with Mongo/NoSQL-type databases. That's not a typical setup in my experience, with regard to standard Django ORM setup.
– anonymous coward
Jan 17 '19 at 21:19
add ...
VIM ctrlp.vim plugin: how to rescan files?
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I have GNU screen windows mapped to my Fn keys so this is perfect - thanks!
– LeonardChallis
Aug 18 '17 at 12:39
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