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How to repeat a string a variable number of times in C++?
...ect idiomatic way to repeat strings in C++ equivalent to the * operator in Python or the x operator in Perl. If you're repeating a single character, the two-argument constructor (as suggested by previous answers) works well:
std::string(5, '.')
This is a contrived example of how you might use an ...
How to check if a column exists in Pandas
...'A', df['B']) + df['C']
The DataFrame get method has similar behavior as python dictionaries.
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Getting “Lock wait timeout exceeded; try restarting transaction” even though I'm not using a transac
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For those using Python MySQL Connector use connection.commit() to commit the INSERT or UPDATE you've just shot through.
– AER
Sep 12 '19 at 7:00
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Evenly distributing n points on a sphere
... the points).
Alternatively, building on the other answer here (and using Python):
> cat ll.py
from math import asin
nx = 4; ny = 5
for x in range(nx):
lon = 360 * ((x+0.5) / nx)
for y in range(ny):
midpt = (y+0.5) / ny ...
Require either of two arguments using argparse
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I never would have guessed it was so easy! Love you Python 3.6!
– bjd2385
Apr 30 '17 at 5:09
Wh...
How to remove unused C/C++ symbols with GCC and ld?
.... .so on Linux), so the symbol names have to be retained so that APIs like Python's ctypes FFI module can use them to look up symbols by name at runtime.
– ssokolow
Aug 11 '19 at 9:24
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How do I get whole and fractional parts from double in JSP/Java?
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The confusion here is because some languages, such as Python, use % to mean modulo (-3.25 % 1 == 0.75) and others, such as Java, Fortran, C, and C++, use % to mean remainder (-3.25 % 1 == -0.25). WindRider may have typed it into a Python REPL for expediency, but that answer is ...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...快速排序
* 不稳定排序，O{nlogn} ~ O{n^2}
* 适合排序大量数据
* 设最左边为基准数
* 右边往左找一个比基准数小的
* 左边往右找一个比基准数大的，和上一步交换
* 碰头后和基准数交换
*
* https://www.tsingfun.com
*************...
Why are regular expressions so controversial? [closed]
...t's why you have to carefully tune your regular expressions in Perl, Java, Python, Ruby… Old-style regular expression engines (in grep, for example) first compile the pattern to a DFA. Afterwards, the complexity of the pattern is largely irrelevant. I just used Java and grep for the same text and ...
How can I use a C++ library from node.js?
...7/2019 compile issues with node-ffi. It's a major PITA! Is it dependent on Python 2.7 or is that just the build process? There must be a LoadLibrary mechanism in NodeJS for a standard Win32 DLL?
– tgraupmann
Oct 30 '19 at 20:48
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