大约有 47,000 项符合查询结果（耗时：0.0383秒） [XML]
Why do we always prefer using parameters in SQL statements?
...w to working with databases. Now I can write SELECT , UPDATE , DELETE , and INSERT commands. But I have seen many forums where we prefer to write:
...
VS2010 and IE10 Attaching the Script debugger to process iexplore.exe failed
So I am using Win7 x64 with VS2010 and have installed the IE10 Win7 Preview and ReSharper 6.1.
12 Answers
...
What is the difference between join and merge in Pandas?
...
I always use join on indices:
import pandas as pd
left = pd.DataFrame({'key': ['foo', 'bar'], 'val': [1, 2]}).set_index('key')
right = pd.DataFrame({'key': ['foo', 'bar'], 'val': [4, 5]}).set_index('key')
left.join(right, lsuffix='_l', rsuffix='_r')
val_l ...
git + LaTeX workflow
I'm writing a very long document in LaTeX. I have my work computer and my laptop, and I work on them both. I need to keep all the files synchronized between the two computers, and also would like to keep a revision history. I chose git as my DVCS, and I'm hosting my repository on my server. I'm also...
What's the difference between “Solutions Architect” and “Applications Architect”? [closed]
... from application, to solution, to enterprise, at multiple companies large and small. I've come to the conclusion that the future in our technology industry is one mostly without architects. If this sounds crazy to you, wait a few years and your company will probably catch up, or your competitors wh...
Truncating floats in Python
...
First, the function, for those who just want some copy-and-paste code:
def truncate(f, n):
'''Truncates/pads a float f to n decimal places without rounding'''
s = '{}'.format(f)
if 'e' in s or 'E' in s:
return '{0:.{1}f}'.format(f, n)
i, p, d = s.partitio...
boundingRectWithSize for NSAttributedString returning wrong size
...ng, but the boundingRectWithSize call is not respecting the size I pass in and is returning a rect with a single line height as opposed to a large height (it is a long string). I have experimented by passing in a very large value for the height and also 0 as in the code below, but the rect returned ...
Array Size (Length) in C#
...nt[,] b = new int[3, 5];)
b.Rank
will give the number of dimensions (2) and
b.GetLength(dimensionIndex)
will get the length of any given dimension (0-based indexing for the dimensions - so b.GetLength(0) is 3 and b.GetLength(1) is 5).
See System.Array documentation for more info.
As @Lucero ...
Fetch frame count with ffmpeg
...deo file using ffmpeg? The render output of ffmpeg shows the current frame and I need the frame count to calculate the progress in percent.
...
Most underused data visualization [closed]
Histograms and scatterplots are great methods of visualizing data and the relationship between variables, but recently I have been wondering about what visualization techniques I am missing. What do you think is the most underused type of plot?
...