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MySQL Select minimum/maximum among two (or more) given values
... watch out if NULL is likely to be in a field value ...
SELECT LEAST(NULL,NOW());
and
SELECT GREATEST(NULL,NOW());
both return null, which may not be what you want (especially in the case of GREATEST)
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Android Reading from an Input stream efficiently
....readLine()) != null; ) {
total.append(line).append('\n');
}
You can now use total without converting it to String, but if you need the result as a String, simply add:
String result = total.toString();
I'll try to explain it better...
a += b (or a = a + b), where a and b are Strings, copie...
What characters are allowed in an email address?
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Watch out! There is a bunch of knowledge rot in this thread (stuff that used to be true and now isn't).
To avoid false-positive rejections of actual email addresses in the current and future world, and from anywhere in the world, you need to know at least...
bash/fish command to print absolute path to a file
...will still give you a valid path given some relative path. If you want to know about file existence use another tool like e.g. test.
– Benjamin Bannier
Feb 27 '13 at 17:47
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Saving changes after table edit in SQL Server Management Studio
...le. Since SQL Server by default doesn't trust you, you need to say "OK, I know what I'm doing, now let me do my work."
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Use email address as primary key?
...an't say that a proposed key is not unique based on hypotheticals without knowing the context. e.g. from the phone company's point of view, a telephone number uniquely identifies a customer, by definition. Yes, you can say, "But what if there are two or three people who might answer when you call th...
Xcode 4: create IPA file instead of .xcarchive
...chive tango once again and go to the Organizer to select your new archive. Now, when clicking on the Share button, the .ipa option should be enabled.
I hope this helps.
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Pushing a local branch up to GitHub
... so that when I run git push , it pushes changes to my GitHub repo. Until now I have only had a master branch.
4 Answers
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When should I use double or single quotes in JavaScript?
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Crockford now preferes double quotes.
– Adam Calvet Bohl
Sep 29 '16 at 5:16
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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
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from here ORA-00054: resource busy and acquire with NOWAIT specified
You can also look up the sql,username,machine,port information and get to the actual process which holds the connection
SELECT O.OBJECT_NAME, S.SID, S.SERIAL#, P.SPID, S.PROGRAM,S.USERNAME,
S.MACHINE,S.PORT...