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Send string to stdin
...din. The <(…) is bash process substitution. Roughly it creates a /dev/fd/… file with the output of the substituting command and passes that filename in place of the <(…), resulting here for example in script < /dev/fd/123. For details, see this answer.
Comparison with other solutions
...
How to get an MD5 checksum in PowerShell
...leage may vary:
$md5 = [System.Security.Cryptography.MD5]::Create("MD5")
$fd = [System.IO.File]::OpenRead($file)
$buf = New-Object byte[] (1024*1024*8) # 8 MB buffer
while (($read_len = $fd.Read($buf,0,$buf.length)) -eq $buf.length){
$total += $buf.length
$md5.TransformBlock($buf,$offset,$b...
Disable output buffering
...(line_buffering=True)
except TypeError:
# Python 2
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
Credits: "Sebastian", somewhere on the Python mailing list.
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Why is there “data” and “newtype” in Haskell? [duplicate]
... constructor
with exactly one field inside it.
Some Examples:
newtype Fd = Fd CInt
-- data Fd = Fd CInt would also be valid
-- newtypes can have deriving clauses just like normal types
newtype Identity a = Identity a
deriving (Eq, Ord, Read, Show)
-- record syntax is still allowed, but only...
git: undo all working dir changes including new files
...en you are ready to actually delete, then remove the -n flag:
git clean -nfd
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How to change the docker image installation directory?
... 17.06-ce paste:
[Service]
ExecStart=
ExecStart=/usr/bin/docker daemon -H fd:// --graph="/mnt"
For docker after 17.06-ce paste:
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H fd:// --data-root="/mnt"
Alternative method through daemon.json
I recently tried above procedure with 17.09-ce on ...
How to save an HTML5 Canvas as an image on a server?
...aURLtoBlob(canvas.toDataURL())
After that you can use ajax with Form:
fd = new FormData
# Append our Canvas image file to the form data
fd.append 'image', file
$.ajax
type: 'POST'
url: '/url-to-save'
data: fd
processData: false
contentType: false
This code using Co...
How to create a file with a given size in Linux?
...;
#include <fcntl.h>
#include <stdlib.h>
int main() {
int fd = creat("/tmp/foo.txt", 0644);
ftruncate(fd, SIZE_IN_BYTES);
close(fd);
return 0;
}
This approach is especially useful to subsequently mmap the file into memory.
use the following command to check that the f...
How to send a “multipart/form-data” with requests in python?
...',
'Content-Type': 'multipart/form-data; '
'boundary=c7cbfdd911b4e720f1dd8f479c50bc7f',
'Host': 'httpbin.org',
'User-Agent': 'python-requests/2.21.0'}
Better still, you can further control the filename, content type and additional headers for each part by using a tuple instead ...
How do I watch a file for changes?
... print "File %s modified" % (FNAME,)
signal.signal(signal.SIGIO, handler)
fd = os.open(FNAME, os.O_RDONLY)
fcntl.fcntl(fd, fcntl.F_SETSIG, 0)
fcntl.fcntl(fd, fcntl.F_NOTIFY,
fcntl.DN_MODIFY | fcntl.DN_CREATE | fcntl.DN_MULTISHOT)
while True:
time.sleep(10000)
...