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Best way to test for a variable's existence in PHP; isset() is clearly broken
...as a function argument, PHP will still raise "notices" if the array itself doesn't exist. In some cases, it can validly be argued that each dimension should have been initialised first, so the notice is doing its job. For other cases, a "recursive" array_key_exists function, which checked each dimen...
Why can a function modify some arguments as perceived by the caller, but not others?
... word "copy" in a context of a function call. I find it confusing.
Python doesn't copy objects you pass during a function call ever.
Function parameters are names. When you call a function Python binds these parameters to whatever objects you pass (via names in a caller scope).
Objects can be mut...
How to make a SIMPLE C++ Makefile
... you could just run all three commands every time. That would work, but it doesn't scale well to a substantial piece of software (like DOGS which takes more than 15 minutes to compile from the ground up on my MacBook).
Instead you could write a file called makefile like this:
tool: tool.o support....
How to get the insert ID in JDBC?
...n will break. You just have to write up some utility method yourself which does the closing task. See also this and this answer.
– BalusC
Mar 9 '11 at 18:55
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Determining Whether a Directory is Writeable
...hough what Christophe suggested is a more Pythonic solution, the os module does have the os.access function to check access:
os.access('/path/to/folder', os.W_OK) # W_OK is for writing, R_OK for reading, etc.
share
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psycopg2: insert multiple rows with one query
...firmed this improvement myself. From what I've read psycopg2's executemany doesn't do anything optimal, just loops and does many execute statements. Using this method, a 700 row insert to a remote server went from 60s to <2s.
– Nelson
Apr 27 '15 at 23:22
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Maven is not working in Java 8 when Javadoc tags are incomplete
...is work with JDK 8 as well as JDK 7? It fails on JDK 7 because its javadoc doesn't know this option.
– Feuermurmel
Feb 11 '14 at 10:18
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Cleanest way to write retry logic?
...ce and expecting different results each time". Second, this coding pattern does not compose well with itself. For example:
Suppose your network hardware layer resends a packet three times on failure, waiting, say, a second between failures.
Now suppose the software layer resends an notification a...
How to complete a git clone for a big project on an unstable connection?
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The shallow clone trick doesn't work well in practice. Cloning a well-packed repo (git://libvirt.org/libvirt.git) changes a 68M transfer into a 61M + 35M transfer. A feature to prioritise the worktree, rather than all branches at depth 1, might fare...
How to manually set an authenticated user in Spring Security / SpringMVC
... where is the implementation of AuthenticationServiceImpl ? What does this class holds?
– Pra_A
Apr 14 '15 at 13:45
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