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How to generate a random string of a fixed length in Go?
... solution we're improving is this:
func init() {
rand.Seed(time.Now().UnixNano())
}
var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
func RandStringRunes(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = letterRunes[rand.Intn(len(le...
Force LF eol in git repo and working copy
...
Dealing with line endings at GitHub
When using vagrant: Windows CRLF to Unix LF Issues
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Context switches much slower in new linux kernels
...
single-threaded libpthread mutex
libpthread condition variable
plain old Unix signals
I had to add
#include <stdint.h>
in order to compile, which I did with this command
g++ -O3 -o condvar-perf condvar-perf.cpp -lpthread -lrt
On kernel 2.6.32
$ ./condvar-perf 1000000
NPTL
mutex ...
Which timestamp type should I choose in a PostgreSQL database?
...is that both "WITH TIME ZONE" and "WITHOUT TIME ZONE" store the value as a unix-like absolute UTC timestamp. The difference is all in how the timestamp is displayed. When "WITH time zone" then the displayed value is the UTC stored value translated to the user's zone. When "WITHOUT time zone" the UTC...
Is quitting an application frowned upon?
...ference is that pressing back button out of your activity might leave your UNIX process lying in wait just in case the user wants to revive your application. This is really no different than a modern operating system that caches recently accessed files in memory. After you quit your windows program,...
Daylight saving time and time zone best practices [closed]
...re both in a single field.
When storing timestamps as a numeric value, use Unix time - which is the number of whole seconds since 1970-01-01T00:00:00Z (excluding leap seconds). If you require higher precision, use milliseconds instead. This value should always be based on UTC, without any time zon...
How to profile a bash shell script slow startup?
...
This was published at Unix & Linux - How to adjust time command to measure a program elapsed time
– F. Hauri
Apr 28 '14 at 9:19
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What should main() return in C and C++?
...efined in <cstdlib>).
Standard C — Common Extension
Classically, Unix systems support a third variant:
int main(int argc, char **argv, char **envp) { ... }
The third argument is a null-terminated list of pointers to strings, each of which is an environment variable which has a name, an ...
Check whether a path is valid in Python without creating a file at the path's target
... above tests.
Since NULL is the only character prohibited in pathnames on UNIX-oriented filesystems, let's leverage that to demonstrate the cold, hard truth – ignoring non-ignorable Windows shenanigans, which frankly bore and anger me in equal measure:
>>> print('"foo.bar" valid? ' + st...
What are the differences between git branch, fork, fetch, merge, rebase and clone?
...base and merge issues
Add your Git branch to your PS1 prompt (see https://unix.stackexchange.com/a/127800/10043), e.g.
The branch is selenium_rspec_conversion.
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