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Check number of arguments passed to a Bash script
... expressions, using (( )) to some may still be better, but they are still possible in [[ ]] with its arithmetic operators like -eq, -ne, -lt, -le, -gt, or -ge by placing the expression as a single string argument:
A=1
[[ 'A + 1' -eq 2 ]] && echo true ## Prints true.
That should be helpful ...
Git: Create a branch from unstaged/uncommitted changes on master
...your changes?
Since the changes are only local, git does not want you to lose them too easily. Upon changing branch, git does not overwrite your local changes. The result of your checkout master is:
M testing
, which means that your working files are not clean. git did change the HEAD, but did...
Is there a better Windows Console Window? [closed]
...e window is wretched to use compared to terminal applications on linux and OS X such as "rxvt", "xterm", or "Terminal". Major complaints:
...
Search and replace a line in a file in Python
...file:
from tempfile import mkstemp
from shutil import move, copymode
from os import fdopen, remove
def replace(file_path, pattern, subst):
#Create temp file
fh, abs_path = mkstemp()
with fdopen(fh,'w') as new_file:
with open(file_path) as old_file:
for line in old_f...
How to call a SOAP web service on Android [closed]
...lable there, but I agree that a better library should be available. It is possible that the XmlPullParser will save you from using SAX, but I don't know much about that.
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How to make git ignore changes in case?
...t too sure what is going on here, but sometimes a particular file in my repository will change the case of it's name. e.g.,:
...
MYSQL OR vs IN performance
...test)
In request for some sample code to test this, here is the simplest possible use case. Using Eloquent for syntax simplicity, raw SQL equivalent executes the same.
$t = microtime(true);
for($i=0; $i<10000; $i++):
$q = DB::table('users')->where('id',1)
->orWhere('id',2)
->o...
How to create an array of 20 random bytes?
...
For those wanting a more secure way to create a random byte array, yes the most secure way is:
byte[] bytes = new byte[20];
SecureRandom.getInstanceStrong().nextBytes(bytes);
BUT your threads might block if there is not enough r...
Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
...
Okay, as posted here https://stackoverflow.com/a/17271172/1458552 without much attention by other users:
The libEGL.dll was missing! Even though this has not been reported when trying to start the application (all other *.dlls such a...
How can I convert NSDictionary to NSData and vice versa?
...
This is a very elegant solution for most Mac OS developers.
– mjl007
Mar 27 '18 at 23:31
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