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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
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wait also (optionally) takes the PID of the process to wait for, and with $! you get the PID of the last command launched in background.
Modify the loop to store the PID of each spawned sub-process into an array, and then loop again waiting o...
Regular expression for floating point numbers
...ssues in some languages (like Java).
Thanks to the nameless one for originally recognizing this.
One relatively simple pattern for matching a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working example
If you also want to match 123. (a period w...
What's the best UML diagramming tool? [closed]
I'm trying to choose a tool for creating UML diagrams of all flavours. Usability is a major criteria for me, but I'd still take more power with a steeper learning curve and be happy. Free (as in beer) would be nice, but I'd be willing to pay if the tool's worth it. What should I be using?
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Tools for analyzing performance of a Haskell program
...ith +RTS -s
$ time ./A +RTS -s
./A +RTS -s
749700
9,961,432,992 bytes allocated in the heap
2,463,072 bytes copied during GC
29,200 bytes maximum residency (1 sample(s))
187,336 bytes maximum slop
**2 MB** total memory in use (0 MB lost due to fragmentat...
Refresh all files in buffer from disk in vim
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bufdo e curiously leaves all the buffers un-syntax-highlighted
– Steven Lu
Jul 9 '13 at 23:03
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Idiomatic way to wait for multiple callbacks in Node.js
...erations are obviously asynchronous.
What is the idiomatic way to wait for all operations to finish in order to
know when the temp file can be deleted?
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Node.js vs .Net performance
...FAST and handling lots of LOAD are two different things. A server that's really FAST at serving one request per second might totally croak if you send it 500 requests per second (under LOAD).
You also have to consider static (and cached) vs dynamic pages. If you're worried about static pages, then...
Swapping two variable value without using third variable
...ation, when one is set to 0, both are set to 0.
When both *x and *y are 0, all other xor operations on *x and *y will equal 0 (as they are the same), which means that the function will set both *x and *y set to 0.
If they have the same values but not the same memory location, everything works as ex...
What is the difference between a JavaBean and a POJO?
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Note that a JavaBean can be and usually is a POJO and many POJOs are actually JavaBeans.
– Joachim Sauer
Sep 8 '09 at 14:21
8
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Questions every good .NET developer should be able to answer? [closed]
...ference type?
What does the "readonly" keyword in C# mean?
I think it usually helps to ask your applicants to complete a simple coding exercise such as:
Write your own linked list class without using the built-in classes.
Write your own hashtable class without using the built-in classes.
Write a...