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dd: How to calculate optimal blocksize? [closed]
...ning THE optimal output block size, I've written the following script that tests writing a 128M test file with dd at a range of different block sizes, from the default of 512 bytes to a maximum of 64M. Be warned, this script uses dd internally, so use with caution.
dd_obs_test.sh:
#!/bin/bash
# S...
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...;var.int1+diff==&var.int2)' is false.
From what I can say with my puny test cases, you are Stop at 0x0013f3: (106) Invalid instruction 0x00dd
printf crashes. "O_O"
gcc 4.4@x86_64-suse-linux
We like to think that:
..05 int has the size of pointers
but 'sizeof(int)==sizeof(void*)' is false.
...
How do I check out a remote Git branch?
Somebody pushed a branch called test with git push origin test to a shared repository. I can see the branch with git branch -r .
...
How do you performance test JavaScript code?
...ime from performance, as will any code, but a) it'll be consistent in your tests and b) you shouldn't be console logging in live code. After testing on my machine, time logging is only a fraction of a MS, but it will add up the more you do it.
– Polyducks
Sep 3...
Are unused CSS images downloaded?
...dent, since it's how they decide to implement the spec, however in a quick test here:
Chrome: Doesn't
FireFox: Doesn't
Safari: Doesn't
IE8: Doesn't
IE7: Doesn't
IE6: Unknown (Can someone test and comment?)
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Casperjs/PhantomJs vs Selenium
We are using Selenium to automate our UI testing. Recently we have seen majority of our users using Chrome. So we wanted to know - pros and cons of using PhantomJS vs Selenium:
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Determine if a function exists in bash
Currently I'm doing some unit tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
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Can Python test the membership of multiple values in a list?
I want to test if two or more values have membership on a list, but I'm getting an unexpected result:
10 Answers
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Test if a variable is set in bash when using “set -o nounset”
...
echo 'empty but defined'
else
echo 'unset'
fi
}
Test:
$ unset WHATEVER
$ check
unset
$ WHATEVER=
$ check
empty but defined
$ WHATEVER=' '
$ check
not empty
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imp...
What's better at freeing memory with PHP: unset() or $var = null
...
@alex, you can sort of do that with unset. For example "$test = 4; (unset) $test;" - strange but true, and it returns the value of $test before unsetting it. Regardless, the PHP manual does confirm that it is a language construct.
– thomasrutter
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