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Cannot pass null argument when using type hinting
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362
PHP 7.1 or newer (released 2nd December 2016)
You can explicitly declare a variable to be nul...
How to choose the id generation strategy when using JPA and Hibernate
...hin a network (the IP address is used). The UUID is encoded as a string of 32 hexadecimal digits in length.
guid
uses a database-generated GUID string on MS SQL Server and MySQL.
native
selects identity, sequence or hilo depending upon the capabilities of the underlying database.
assigned
lets the a...
How to get the last element of a slice?
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307
For just reading the last element of a slice:
sl[len(sl)-1]
For removing it:
sl = sl[:len(...
What's the best way to parse command line arguments? [closed]
...getopt. getopt is pretty much a one-to-one mapping of the standard getopt(3) C library functions, and not very easy to use.
optparse, while being a bit more verbose, is much better structured and simpler to extend later on.
Here's a typical line to add an option to your parser:
parser.add_option...
Codesign error: Certificate identity appearing twice
CodeSign error: Certificate identity 'iPhone Developer: XXXX (12345678)' appears more than once in the keychain. The codesign tool requires there only be one.
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MySQL IF NOT NULL, then display 1, else display 0
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LEFT JOIN addresses a ON c.customerid = a.customerid
WHERE customerid = 123
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How do Mockito matchers work?
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237
Mockito matchers are static methods and calls to those methods, which stand in for arguments du...
Returning value from called function in a shell script
...ho "directory not created"
else
echo "directory already created"
fi
3. Share variable
lockdir="somedir"
retval=-1
testlock(){
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
r...
How to include “zero” / “0” results in COUNT aggregate?
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edited Feb 10 '13 at 0:09
answered Feb 10 '13 at 0:04
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What is the pythonic way to avoid default parameters that are empty lists?
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153
def my_func(working_list=None):
if working_list is None:
working_list = []
wor...