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Using global variables in a function
...rint_globvar():
print(globvar) # No need for global declaration to read value of globvar
set_globvar_to_one()
print_globvar() # Prints 1
I imagine the reason for it is that, since global variables are so dangerous, Python wants to make sure that you really know that's what you're pla...
How to export a Vagrant virtual machine to transfer it
...ps, check this out => Is there any way to clone a vagrant box that is already installed
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What is the difference between const_iterator and non-const iterator in the C++ STL?
...d to modify the container with them), to better document your intention of reading without modifying.
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Why does Iterable not provide stream() and parallelStream() methods?
...2013.
The definitive discussion of the Expert Group is rooted at this thread.
While it seemed "obvious" (even to the Expert Group, initially) that stream() seemed to make sense on Iterable, the fact that Iterable was so general became a problem, because the obvious signature:
Stream<T> st...
Understanding Linux /proc/id/maps
...PID/maps describes a region of contiguous virtual memory in a process or thread. Each row has the following fields:
address perms offset dev inode pathname
08048000-08056000 r-xp 00000000 03:0c 64593 /usr/sbin/gpm
address - This is the starting and ending address of the region i...
How do I exit the Vim editor?
...:quit!)
:wq to write and quit
:wq! to write and quit even if file has only read permission (if file does not have write permission: force write)
:x to write and quit (similar to :wq, but only write if there are changes)
:exit to write and exit (same as :x)
:qa to quit all (short for :quitall)
:cq t...
Checking Bash exit status of several commands efficiently
...vidual
# command fails.
#
# Example:
# step "Remounting / and /boot as read-write:"
# try mount -o remount,rw /
# try mount -o remount,rw /boot
# next
step() {
echo -n "$@"
STEP_OK=0
[[ -w /tmp ]] && echo $STEP_OK > /tmp/step.$$
}
try() {
# Check for `-b'...
Using std Namespace
...
Most C++ users are quite happy reading std::string, std::vector, etc. In fact, seeing a raw vector makes me wonder if this is the std::vector or a different user-defined vector.
I am always against using using namespace std;. It imports all sorts of names...
Should I put #! (shebang) in Python scripts, and what form should it take?
...ncrete advantage to including it besides taste: it makes clear to a future reader of the file that they're reading an executable script, rather than a file that's meant to be imported. Similarly to public/private access control modifiers in languages that have them, shebangs are useful as documentat...
PHP json_encode encoding numbers as strings
... Thanks Martin. I'm using 5.2.9. I wonder if the numeric data's getting read from the db as string? I'm sure the field types are int, but I can't think of another explanation. I'll try your quick test on my system and see if I get the same result.
– Chris Barnhill
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