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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
... this is notoriously slow.
Only ever use IN with a fixed list of values.
More tips
If you want to make queries faster,
don't do a SELECT * only select
the fields that you really need.
Make sure you have an index on relevant_field to speed up the equi-join.
Make sure to group by on the primary ...
What does (x ^ 0x1) != 0 mean?
... don't know the context. If x is some kind of bit flag, it is IMO actually more clear to write it as it is now than using the != operator.
– Spook
Dec 19 '13 at 10:57
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Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference
...ck is executing. This is the meaning of JavaScript being single-threaded.
More specifically, when the JS engine is idle -- not executing a stack of (a)synchronous code -- it will poll for events that may have triggered asynchronous callbacks (e.g. expired timeout, received network response) and exe...
RabbitMQ and relationship between channel and connection
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How do you stop tracking a remote branch in Git?
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@GabrielStaples I agree. For more on remote tracking: stackoverflow.com/a/44081446/6309, stackoverflow.com/a/38202006/6309 and stackoverflow.com/a/28341622/6309
– VonC
Sep 6 at 9:24
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How do I import CSV file into a MySQL table?
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Make Div overlay ENTIRE page (not just viewport)?
...osition fixed work in IE6?! I know probably nobody cares much about IE6 anymore.
– Marco Demaio
May 17 '10 at 22:04
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What is the difference between `git merge` and `git merge --no-ff`?
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To more directly answer the OP's question: they aren't always different, but if they are, it's clear from gitk or git log --graph that the fast-forward merge didn't create a merge commit, while the non-fast-forward one did.
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How can I unstage my files again after making a local commit?
...d in this answer is actually what git commit --amend does; but with a much more complicated workflow. This does not answer the question OP asked, in spite of giving a good direction (git reset).
– 7heo.tk
May 12 '15 at 11:26
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How to Create Grid/Tile View?
...ks yet. And yes, CSS columns might work too, but unlike flexbox that seems more designed for text than for layout.
– Oriol
Jan 30 '16 at 13:48
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