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Cannot install packages using node package manager in Ubuntu
...ln -s /usr/bin/nodejs /usr/bin/node
alias node=nodejs
rm -r /usr/local/lib/python2.7/dist-packages/localstack/node_modules
npm install -g npm@latest || sudo npm install -g npm@latest
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Why fragments, and when to use fragments instead of activities?
...M I've not seen anything useful to me in the Fragment class over using the XML "include" tag. The kinds of things that I would find valuable would be the ability to specify one layout that would magically morph into the best user experience at all resolutions. From what I can tell you still need to ...
How to extract the substring between two markers?
...urn an empty string if either "AAA" or "ZZZ" don't exist in your_text.
PS Python Challenge?
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How does git compute file hashes?
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I needed this for some unit tests in Python 3 so thought I'd leave it here.
def git_blob_hash(data):
if isinstance(data, str):
data = data.encode()
data = b'blob ' + str(len(data)).encode() + b'\0' + data
h = hashlib.sha1()
h.update(da...
Add single element to array in numpy
...2 s ± 16.1 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
Using python list converting to array afterward:
d = [0]
for k in range(int(10e4)):
d.append(k)
f = np.array(d)
13.5 ms ± 277 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
Pre-allocating numpy array:
e = np.ze...
How to create a MySQL hierarchical recursive query
...tended for. The tables of a relational database are not hierarchical (like XML), but are simply a flat list. Hierarchical data has a parent-child relationship that is not naturally represented in a relational database table.
Read more
Refer the blog for more details.
EDIT:
select @pv:=category_id...
Passing parameters to a Bash function
...
Knowledge of high level programming languages (C/C++/Java/PHP/Python/Perl ...) would suggest to the layman that bash functions should work like they do in those other languages. Instead, bash functions work like shell commands and expect arguments to be passed to them in the same way on...
What does the plus sign do in '+new Date'
...h in programming brevity is most certainly not the wit of the soul. As the python community has so adequately put it "explicit is always better than implicit." What if a browser changed the automatic type conversion that's implied there through a regression? Now your code just doesn't work! .getTime...
Hiding the scroll bar on an HTML page
... Only works internally within a users profile settings. Disables scrolling XML root elements and disables using arrow keys and mouse wheel to scroll web pages.
Mozilla Developer Docs on 'Overflow'
Further details about Mozilla
This is not really useful as far as I know, but it's worth noting that...
Best practice for storing and protecting private API keys in applications [closed]
...e private key string is stored in the Java class vs in the String resource XML?
– Alan
Apr 15 '16 at 16:16
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