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How to format strings in Java
...
140
In addition to String.format, also take a look java.text.MessageFormat. The format less terse ...
How to create a GUID/UUID in Python
...mple (working on 2 and 3):
>>> import uuid
>>> uuid.uuid4()
UUID('bd65600d-8669-4903-8a14-af88203add38')
>>> str(uuid.uuid4())
'f50ec0b7-f960-400d-91f0-c42a6d44e3d0'
>>> uuid.uuid4().hex
'9fe2c4e93f654fdbb24c02b15259716c'
...
Null coalescing in powershell
...l "new value"
New-Alias "?:" IfTrue
$ans = ?: ($q -eq "meaning of life") 42 $otherval
Clearly this isn't going to be to everyone's taste, but may be what you're looking for.
As Thomas notes, one other subtle difference between the C# version and the above is that C# performs short-circuiting of...
Real differences between “java -server” and “java -client”?
...ith a much smaller kernel.
G. Demecki points out in the comments that in 64-bit versions of JDK, the -client option is ignored for many years.
See Windows java command:
-client
Selects the Java HotSpot Client VM.
A 64-bit capable JDK currently ignores this option and instead uses the Java Hotspot...
Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
...a Micro instance running.
Run dd if=/dev/zero of=/swapfile bs=1M count=1024
Run mkswap /swapfile
Run swapon /swapfile
Add this line /swapfile swap swap defaults 0 0 to /etc/fstab
Step 4 is needed if you would like to automatically enable swap file after each reboot.
Some useful command related to ...
How to call erase with a reverse iterator
...
184
+50
After som...
How do I submit disabled input in ASP.NET MVC?
...itrov
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Check if a Python list item contains a string inside another string
...abc in any string in the list, you could try
some_list = ['abc-123', 'def-456', 'ghi-789', 'abc-456']
if any("abc" in s for s in some_list):
# whatever
If you really want to get all the items containing abc, use
matching = [s for s in some_list if "abc" in s]
...
Unable to copy ~/.ssh/id_rsa.pub
...PLAY=:0 xclip -sel clip < ~/.ssh/id_rsa.pub didn't work for me (ubuntu 14.04), but you can use :
cat ~/.ssh/id_rsa.pub
to get your public key
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