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How much size “Null” value takes in SQL Server
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The reason for the discrepancies that you have observed in information from other sources:
The start of the first article is a bit misleading. The article is not talking about the cost of storing a NULL value, but the cost of having the ability to store a NULL (i.e the cost of making a column ...
Git: See my last commit
...-name-status HEAD^..HEAD
This is also very close to the output you'd get from svn status or svn log -v, which many people coming from subversion to git are familiar with.
--name-status is the key here; as noted by other folks in this question, you can use git log -1, git show, and git diff to get...
How do I revert all local changes in Git managed project to previous state?
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will not remove untracked files, where as git-clean will remove any files from the tracked root directory that are not under git tracking. WARNING - BE CAREFUL WITH THIS! It is helpful to run a dry-run with git-clean first, to see what it will delete.
This is also especially useful when you get th...
Why are regular expressions so controversial? [closed]
...ithin a (?(DEFINE)...) block, so that you can separate out the declaration from the execution of individual named elements of your patterns. This makes them act rather like subroutines within the pattern.
A good example of this sort of “grammatical regex” can be found in this answer and this on...
Using CookieContainer with WebClient class
...or HttpWebRequests ( request.CookieContainer ). How can I collect cookies from a WebClient in a CookieContainer?
5 Answers...
How to check if array element exists or not in javascript?
...ood of JS
Thus, they have the prototype method hasOwnProperty "inherited" from Object
in my testing, hasOwnProperty can check if anything exists at an array index.
So, as long as the above is true, you can simply:
const arrayHasIndex = (array, index) => Array.isArray(array) && array.h...
What are “decorators” and how are they used?
...corates them? In other words, say I have module A that decorates a service from module B. I then have module C that depends upon module A and module B. Inside of module C, is the service from module B the original or decorated version?
– Jon Jaques
Feb 26 '14 a...
Find the min/max element of an Array in JavaScript
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jsperf.com/array-min-max-random/1 starting from 60 elements Math methods are breaking equal with while cycles, if array size is greater than 60, than Math methods wins. Larger the array - greater the Math methods overtake. ( for 100 elems Math.min/max is 10% faster, f...
Finding Number of Cores in Java
How can I find the number of cores available to my application from within Java code?
4 Answers
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How to un-escape a backslash-escaped string?
...ings. The following works for Python3 in all cases, as far as I can tell:
from codecs import encode, decode
sample = u'mon€y\\nröcks'
result = decode(encode(sample, 'latin-1', 'backslashreplace'), 'unicode-escape')
print(result)
As outlined in the comments, you can also use the literal_eval me...