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How to dynamically load a Python class
Given a string of a Python class, e.g. my_package.my_module.MyClass , what is the best possible way to load it?
10 Answers...
How to iterate over arguments in a Bash script
...fully: "${array[@]}" behaves analogously to "$@".)
Example:
$ mkdir "my dir" anotherdir
$ ls
anotherdir my dir
$ cp /dev/null "my dir/my file"
$ cp /dev/null "anotherdir/myfile"
$ ls -Fltr
total 0
drwxr-xr-x 3 jleffler staff 102 Nov 1 14:55 my dir/
drw...
Reading output of a command into an array in Bash
I need to read the output of a command in my script into an array. The command is, for example:
3 Answers
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Best way to iterate through a Perl array
... #2 is good when you do queues (e.g. breadth-first searches): my @todo = $root; while (@todo) { my $node = shift; ...; push @todo, ...; ...; }
– ikegami
Feb 2 '15 at 14:40
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How come an array's address is equal to its value in C?
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That's because the array name (my_array) is different from a pointer to array. It is an alias to the address of an array, and its address is defined as the address of the array itself.
The pointer is a normal C variable on the stack, however. Thus, you ca...
Globally override key binding in Emacs
... for that key? I want to override all major/minor mode maps and make sure my binding is always in effect.
8 Answers
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How to assign the output of a command to a Makefile variable
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Use the Make shell builtin like in MY_VAR=$(shell echo whatever)
me@Zack:~$make
MY_VAR IS whatever
me@Zack:~$ cat Makefile
MY_VAR := $(shell echo whatever)
all:
@echo MY_VAR IS $(MY_VAR)
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Check if a given key already exists in a dictionary and increment it
...ct (available for Python 2.5+). This
from collections import defaultdict
my_dict = defaultdict(int)
my_dict[key] += 1
will do what you want.
For regular Python dicts, if there is no value for a given key, you will not get None when accessing the dict -- a KeyError will be raised. So if you want...
Alternatives to gprof [closed]
... **. When that is understood, you can see that -
gprof embodies certain myths about performance, such as:
that program counter sampling is useful.
It is only useful if you have an unnecessary hotspot bottleneck such as a bubble sort of a big array of scalar values. As soon as you, for example, ...
How do I set up a basic Ruby project?
... you can use the bundle gem command and rspec --init.
~/code $ bundle gem my_lib
create my_lib/Gemfile
create my_lib/Rakefile
create my_lib/LICENSE.txt
create my_lib/README.md
create my_lib/.gitignore
create my_lib/my_lib.gemspec
create my_lib/lib/my...