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Which are more performant, CTE or temporary tables?
...bles are automatically dropped (usually at the end of a session). I don't know about other DBMS though.
– Serrano
Feb 11 '13 at 12:50
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What is meant by the term “hook” in programming?
...on)". You are passing a function pointer to the hookEvent function, so it knows what function to call when the event occurs. Hope that helps :-)
– William Brendel
Jan 22 '09 at 0:12
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What does java:comp/env/ do?
...ode I found out that the simple property useNaming="false" did the trick!! Now Tomcat resolves names java:/liferay instead of java:comp/env/liferay
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Java: when to use static methods
...pgToKpl(double mpg)
...which would be static, because one might want to know what 35mpg converts to, even if nobody has ever built a Car. But this method (which sets the efficiency of one particular Car):
void setMileage(double mpg)
...can't be static since it's inconceivable to call the metho...
In-Place Radix Sort
...it while waiting for my own bioinformatics code to run. The version above now is actually tested and works. For 10 million sequences of 5 bases each, it's about 3x faster than an optimized introsort.
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How to exit pdb and allow program to continue?
...d show
something like: (pdb) .....
- switch back to pdb, then press Enter, now you are all set, pdb command
shell reappear again
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Writing a dict to txt file and reading it back?
...I feel like I am just missing one step but I have been looking for a while now.
6 Answers
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SBT stop run without exiting
...lly, start sbt, optionally switch to the subproject you want to run, run.
Now, when you want to stop the process, close its stdin by typing CTRL-D in the sbt shell.
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?: operator (the 'Elvis operator') in PHP
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What the heck? I just find this out now, right after upgrading to PHP 7? I could have been using this for years!
– Buttle Butkus
Feb 27 '19 at 5:56
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What is PostgreSQL explain telling me exactly?
...but let's look at one clear example. Here's the same query from before but now containing an ORDER BY clause:
EXPLAIN SELECT * FROM post ORDER BY body LIMIT 50;
Limit (cost=23283.24..23283.37 rows=50 width=422)
-> Sort (cost=23283.24..23859.27 rows=230412 width=422)
Sort Key: body
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