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What's an elegant way to conditionally add a class to an HTML element in a view?
...eact
This technique is inspired by an add-on called classNames (formerly known as classSet) from Facebook’s React front-end framework.
Using in your Rails projects
As of now, the class_names function does not exist in Rails, but this article shows you how to add or implement it into your projec...
How do I get the number of days between two dates in JavaScript?
... As the answer that's marked correct and highest voted (as of now), it's worth commenting that this answer doesn't correctly handle Daylight Savings Time. See Michael Liu's answer instead.
– osullic
Sep 21 '16 at 0:01
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Visual Studio, debug one of multiple threads
...
Thanks Charles, that was helpful (did not know you could do that). However, the most efficient way for me to debug is the one that jeffamaphone wrote as I do not know the name before it hits the breakpoint and sees some values
– Oskar Kjellin
...
psql: FATAL: Peer authentication failed for user “dev”
... cipher: ECDHE-RSA-AES256-GCM-SHA384, bits: 256, compression: off) You are now connected to database "glossary" as user "john" on host "localhost" at port "5432". it worked.
– look
Dec 4 '16 at 2:26
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What are the differences between a HashMap and a Hashtable in Java?
...r @aberrant80 or an admin by flagging. Flagging could help - will try that now.
– anon58192932
Oct 14 '16 at 20:05
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show 1 more comment
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How can I make an “are you sure” prompt in a Windows batchfile?
...re enabled by default as otherwise nearly no batch file would work anymore nowadays.
choice.exe is a separate console application (external command) located in %SystemRoot%\System32. choice.exe of Windows Server 2003 can be copied into directory %SystemRoot%\System32 on a Windows XP machine for usa...
Executing multi-line statements in the one-line command-line?
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@RudolfOlah hope you know it by now but just for reference, you need to wrap the print statement for python3+ versions like: python -c "exec(\"import sys\nfor r in range(10): print('rob')\")"
– systrigger
Mar...
How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
...ytool expects, e.g. openssl x509 -in certs.txt -out certs.der -outform DER
Now you want to import this cert into the system default 'cacert' file. Locate the system default 'cacerts' file for your Java installation. Take a look at How to obtain the location of cacerts of the default java installatio...
Equivalent of varchar(max) in MySQL?
...ATE TABLE foo ( v VARCHAR(65532) );
Query OK, 0 rows affected (0.01 sec)
Now if we try to use a multibyte charset at the table level, we find that it counts each character as multiple bytes. UTF8 strings don't necessarily use multiple bytes per string, but MySQL can't assume you'll restrict all yo...
Which is the preferred way to concatenate a string in Python?
...esulting string is a million characters long, appending was still faster.
Now let's try with appending a thousand character long string a hundred thousand times:
a += b:
0.41823482513427734
a.append(b):
0.010656118392944336
The end string, therefore, ends up being about 100MB long. That was pret...