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How to do version numbers? [closed]
...e? Less of an R&D decision and more a product decision.
minor: Starts from 0 whenever major is incremented. +1 for every version that goes public.
release: Every time you hit a development milestone and release the product, even internally (e.g. to QA), increment this. This is especially impor...
datetime dtypes in pandas read_csv
...ou might try passing actual types instead of strings.
import pandas as pd
from datetime import datetime
headers = ['col1', 'col2', 'col3', 'col4']
dtypes = [datetime, datetime, str, float]
pd.read_csv(file, sep='\t', header=None, names=headers, dtype=dtypes)
But it's going to be really hard to ...
How do you delete all text above a certain line
...
dgg
will delete everything from your current line to the top of the file.
d is the deletion command, and gg is a movement command that says go to the top of the file, so when used together, it means delete from my current position to the top of the fi...
Defining an abstract class without any abstract methods
...e if derivations of that class will have different contractual obligations from those of other derivations of the parent.
– supercat
Dec 29 '13 at 16:41
add a comment
...
The key must be an application-specific resource id
...atic final int TAG_ONLINE_ID = 1 + 2 << 24;
should work. More info from ceph3us:
The specified key should be an id declared in the resources of the
application to ensure it is unique Keys identified as belonging to the
Android framework or not associated with any package will cause a...
Combined area of overlapping circles
... You'll need to subtract the center connected polygon for the hole from the total and add the circle slices for that polygon to the total.
– Ants Aasma
Nov 3 '09 at 15:03
3...
What is the best way to implement a “timer”? [duplicate]
... If you have one, you can just drag a timer control onto your form from the Toolbox and it does all the above for you.
– Rob Sedgwick
Feb 6 '14 at 20:44
...
What is thread safe or non-thread safe in PHP?
...ways choose non-thread safe version because I always use nginx, or run PHP from the command line.
The non-thread safe version should be used if you install PHP as a CGI binary, command line interface or other environment where only a single thread is used.
A thread-safe version should be used if y...
Is there a standard sign function (signum, sgn) in C/C++?
... ints, floats, doubles, unsigned shorts, or any custom types constructible from integer 0 and orderable.
Fast! copysign is slow, especially if you need to promote and then narrow again. This is branchless and optimizes excellently
Standards-compliant! The bitshift hack is neat, but only works for so...
Error handling with node.js streams
...l you have to do is :
include the stream module
instantiate ( or inherit from) the Transform class
implement a _transform method which takes a (chunk, encoding, callback).
The chunk is your data. Most of the time you won't need to worry about encoding if you are working in objectMode = true. T...