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How to zero pad a sequence of integers in bash so that all have the same width?
... characters d and g differs subtly in that d interprets 0-prefixed numbers strings as octal numbers and converts them to decimal, whereas g treats them as decimals. (@EdManet: that's why '00026' turned into '00022' with d). Another thing worth mentioning: seq -w does automatic zero-padding of the ou...
How to slice an array in Bash
... defaults to
zero, an omitted second index defaults to the size of the string being
sliced.
>>> local a=(0 1 2 3 4 5)
>>> # from the beginning to position 2 (excluded)
>>> echo $(array.slice 0:2 "${a[@]}")
>>> echo $(array.slice :2 "${a[@]}...
How to view the assembly behind the code using Visual C++?
...isassembler on the .exe.
e.g. http://rextester.com/OKI40941
#include <string>
#include <boost/filesystem.hpp>
#include <Windows.h>
using namespace std;
static string my_exe(void){
char buf[MAX_PATH];
DWORD tmp = GetModuleFileNameA( NULL, // self
...
Use of alloc init instead of new
...selected ones are:
new doesn't support custom initializers (like initWithString)
alloc-init is more explicit than new
General opinion seems to be that you should use whatever you're comfortable with.
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Visualizing branch topology in Git
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Might I ask where you got the format string from? Or how on earth you concocted that thing?
– elliotwesoff
Oct 6 '16 at 16:38
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Why is the minimalist, example Haskell quicksort not a “true” quicksort?
...implementation of putStrLn works by copying the characters of the argument String into to an output buffer. But when it enters this loop, show has not run yet. Therefore, when it goes to copy the first character from the string, Haskell evaluates the fraction of the show and quicksort calls needed t...
Should I implement __ne__ in terms of __eq__ in Python?
... work (assuming SQLAlchemy knows how to insert MyClassWithBadNE into a SQL string at all; this can be done with type adapters without MyClassWithBadNE having to cooperate at all), passing the expected proxy object to filter, while:
results = session.query(MyTable).filter(MyClassWithBadNE() != MyTa...
CSS: background image on background color
...e box shadow you can always use a pseudo element for the image without any extra HTML:
.btn{
position: relative;
background-color: #6DB3F2;
}
.btn:before{
content: "";
display: block;
width: 100%;
height: 100%;
position:absolute;
top:0;
left:0;
background-ima...
How to disable Django's CSRF validation?
...ble CSRF and have session authentication for the whole app, you can add an extra middleware like this -
class DisableCSRFMiddleware(object):
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
setattr(request, '_dont_enforce_csrf_checks', True)...
How to check if my string is equal to null?
I want to perform some action ONLY IF my string has a meaningful value. So, I tried this.
27 Answers
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