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How do I know the script file name in a Bash script?
...ink "$0" || echo "$0")")"
IMO, that'll produce confusing output. "I ran foo.sh, but it's saying I'm running bar.sh!? Must be a bug!" Besides, one of the purposes of having differently-named symlinks is to provide different functionality based on the name it's called as (think gzip and gunzip o...
Do I cast the result of malloc?
...ints are also trivial, if you use the variable in your malloc call: char **foo = malloc(3*sizeof(*foo)); if quite full-proof: 3 pointers to char pointers. then loop, and do foo[i] = calloc(101, sizeof(*(foo[i])));. Allocate array of 101 chars, neatly initialized to zeroes. No cast needed. change the...
Why is printing to stdout so slow? Can it be sped up?
...y own amusing experiment, and here are the results.
$ python test.py 2>foo
...
$ cat foo
-----
timing summary (100k lines each)
-----
print : 6.040 s
write to file : 0.122 s
print with stdout = /dev/null : 0.121 s
$ python test.py 2>foo |cat
...
$ cat ...
Can I do a partial revert in GIT
... I wanted to revert only part of a commit, so I did: (1) git show ... > foo.txt (2) edit foo.txt to remove the diffs I wanted not to revert (3) git apply --reverse foo.txt to revert the diffs still listed in foo.txt.
– cxw
Mar 19 '18 at 17:49
...
AngularJS with Django - Conflicting template tags
... any way to also update the $interpolateProvider for raw output? e.g. {{{foo}}} becoming {{[{foo}]}} ?
– tester
Aug 26 '13 at 7:05
|
show ...
Java: Instanceof and Generics
...e) {
//...
You are casting the object to T (your generic type), just to fool the compiler. Your cast does nothing at runtime, but you will still get a ClassCastException when you try to pass the wrong type of object into your abstract method.
NOTE 1: If you are doing additional unchecked casts i...
How to execute PHP code from the command line?
...line
You can use php's -r switch as such:
php -r 'echo function_exists("foo") ? "yes" : "no";'
The above PHP command above should output no and returns 0 as you can see:
>>> php -r 'echo function_exists("foo") ? "yes" : "no";'
no
>>> echo $? # print the return value of the pr...
How to merge dictionaries of dictionaries?
...Case: "leaves are nested dicts that end in empty dicts":
d1 = {'a': {1: {'foo': {}}, 2: {}}}
d2 = {'a': {1: {}, 2: {'bar': {}}}}
d3 = {'b': {3: {'baz': {}}}}
d4 = {'a': {1: {'quux': {}}}}
This is the simplest case for recursion, and I would recommend two naive approaches:
def rec_merge1(d1, d2):...
How to split long commands over multiple lines in PowerShell
...
If you have a function:
$function:foo | % Invoke @(
'bar'
'directory'
$true
)
If you have a cmdlet:
[PSCustomObject] @{
Path = 'bar'
Type = 'directory'
Force = $true
} | New-Item
If you have an application:
{foo.exe @Args} | % Invoke @(
...
Assert a function/method was not called using Mock
...uments.
>>> ((42,),) in m.call_args_list
True
>>> m(42, foo='bar')
<MagicMock name='mock()' id='139675158423872'>
>>> ((42,), {'foo': 'bar'}) in m.call_args_list
True
>>> m(foo='bar')
<MagicMock name='mock()' id='139675158423872'>
>>> ((), {'...