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“Java DateFormat is not threadsafe” what does this leads to?
Everybody cautions regarding Java DateFormat not being thread safe and I understand the concept theoretically.
11 Answers
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Delete all but the most recent X files in bash
...ll loop (POSIX-compliant):
ls -tp | grep -v '/$' | tail -n +6 | while IFS= read -r f; do echo "$f"; done
# One by one, but using a Bash process substitution (<(...),
# so that the variables inside the `while` loop remain in scope:
while IFS= read -r f; do echo "$f"; done < <(ls -tp | grep...
Integrating the ZXing library directly into my Android application
... - SOLVED + GUIDE
I've managed to figure it out :) And down below you can read step-by-step guide so it hopefully can help others with the same problem as I had ;)
Install Apache Ant - (See this YouTube video for config help)
Download the ZXing source from ZXing homepage and extract it
With the u...
What is a good Hash Function?
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I had read from Jenkins' site that SFH is one of the best then, but I think Murmur might do better, see this excellent answer: programmers.stackexchange.com/questions/49550/…
– nawfal
Apr 14...
Are there any smart cases of runtime code modification?
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An interesting read is Michael Abrash's 3-Part Pixomatic articles on DDJ: drdobbs.com/architecture-and-design/184405765, drdobbs.com/184405807, drdobbs.com/184405848. The second link (Part2) talks about the Pixomatic code welder for the pix...
erb, haml or slim: which one do you suggest? And why? [closed]
...proper tags.
If you work on both HTML and ruby logic, or your designer is ready to learn something new (like HAML) I'd go for HAML. It is a lot more ruby-friendly, reduces char count by much and a lot more readable than ERB.
For example (taken from official HAML site):
In ERB your view will look ...
NOT using repository pattern, use the ORM as is (EF)
... syntax?
LINQ and EF were developed so you could do neat stuff with it to read and traverse object graphs. Creating and maintain a repository that can give you the same flexibility to do that is a monstrous task. In my experience any time I've created a repository I've ALWAYS had business logic lea...
How do I forward parameters to other command in bash script?
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Pay attention to use quotes! Read more on why it is important them around here: stackoverflow.com/a/4824637/4575793
– Cadoiz
Jul 13 '19 at 15:59
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What's the rationale for null terminated strings?
...ple library function
efficient for the main use of strings : constant text read
sequentially from a known start
(mostly messages to the user).
the terminating zero is not even mandatory, all necessary tools
to manipulate chars like a bunch of
bytes are available. When performing
array initialisation...
How to validate an email address in PHP
...ng a confirmation mail.
Now that you have your easy answer feel free to read on about email address validation if you care to learn or otherwise just use the fast answer and move on. No hard feelings.
Trying to validate an email address using a regex is an "impossible" task. I would go as far a...