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Should MySQL have its timezone set to UTC?
..., unless you specifically set the column to allow null when you
create it.
Read this
To select a timestamp column in UTC format
no matter what timezone the current MySQL session is in:
SELECT
CONVERT_TZ(`timestamp_field`, @@session.time_zone, '+00:00') AS `utc_datetime`
FROM `table_name`
You...
Why does pylint object to single character variable names?
...t will be descriptive. I'm currently using with open(FILE) as f: items = f.readlines() for example, where the variable f is really obvious, but I get pylint warnings. This made me change to flake8.
– Axel Örn Sigurðsson
Aug 20 '14 at 14:05
...
Python csv string to array
...d,e,f
gęś,zółty,wąż,idzie,wąską,dróżką,
"""
f = StringIO(scsv)
reader = csv.reader(f, delimiter=',')
for row in reader:
print('\t'.join(row))
simpler version with split() on newlines:
reader = csv.reader(scsv.split('\n'), delimiter=',')
for row in reader:
print('\t'.join(row))...
How can I make one python file run another? [duplicate]
...oid where possible.
execfile('file.py') in Python 2
exec(open('file.py').read()) in Python 3
Spawn a shell process: os.system('python file.py'). Use when desperate.
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A semantics for Bash scripts?
...:-2}" Hello World
+ echo Hello World
Hello World
For more on expansions, read the Parameter Expansion section of the manual. It's quite powerful.
Integers and arithmetic expressions
You can imbue names with the integer attribute to tell the shell to treat the right hand side of assignment expres...
What are the pros and cons of performing calculations in sql vs. in your application
...; the server could be streaming rows which you consume as they arrive - a "reader" metaphor is not uncommon.
– Marc Gravell♦
Sep 22 '11 at 23:03
1
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SQLite DateTime comparison
...
For all those reading the first sentence, in '17 SQLite does have date and datetime
– alisianoi
Jun 21 '17 at 13:29
3
...
Math - mapping numbers
...other words,
R = (20 - 10) / (6 - 2)
y = (x - 2) * R + 10
This evenly spreads the numbers from the first range in the second range.
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How to get last items of a list in Python?
..., like a string) would look like this:
num_list[-9:]
When I see this, I read the part in the brackets as "9th from the end, to the end." (Actually, I abbreviate it mentally as "-9, on")
Explanation:
The full notation is
sequence[start:stop:step]
But the colon is what tells Python you're giv...
Extending an Object in Javascript
...ct-oriented than that?"
You don't need constructors, no new instantiation (read why you shouldn't use new), no super, no self-made __construct. You simply create Objects and then extend or morph them.
This pattern also offers immutability (partial or full), and getters/setters.
TypeScript
The TypeSc...