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TypeError: 'str' does not support the buffer interface
The above python code is giving me following error:
7 Answers
7
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Making heatmap from pandas DataFrame
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You want matplotlib.pcolor:
import numpy as np
from pandas import DataFrame
import matplotlib.pyplot as plt
index = ['aaa', 'bbb', 'ccc', 'ddd', 'eee']
columns = ['A', 'B', 'C', 'D']
df = DataFrame(abs(np.random.randn(5, 4)), index=index, co...
What is the preferred/idiomatic way to insert into a map?
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First of all, operator[] and insert member functions are not functionally equivalent :
The operator[] will search for the key, insert a default constructed value if not found, and return a reference to which you assign a value. Obviously, this can be inefficient...
Is if(items != null) superfluous before foreach(T item in items)?
...ach (var item in items ?? new List<string>())
{
item.Dump();
}
but you might check performance of it. So I still prefer having if (items != null) first.
Based on Eric's Lippert suggestion I changed code to:
List<string> items = null;
foreach (var item in items ?? Enumerable.Em...
Compare double to zero using epsilon
Today, I was looking through some C++ code (written by somebody else) and found this section:
11 Answers
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Iterating through a range of dates in Python
I have the following code to do this, but how can I do it better? Right now I think it's better than nested loops, but it starts to get Perl-one-linerish when you have a generator in a list comprehension.
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In JavaScript, does it make a difference if I call a function with parentheses?
..., I am not passing any arguments to the function so I wondered, what would be the difference between:
5 Answers
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Can I change multiplier property for NSLayoutConstraint?
I created two views in one superview, and then added constraints between views:
13 Answers
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Count rows with not empty value
...et: How can I count the rows of a given area that have a value? All hints about this I found up to now lead to formulas that do count the rows which have a not empty content (including formula), but a cell with
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服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...tpClient调用错误导致的服务器异常，具体过程如下：http: blog.csdn.net shootyou article details 6615051里头的分析过...昨天解决了一个HttpClient调用错误导致的服务器异常，具体过程如下：
http://blog.csdn.net/shootyou/article/details/6615051
里头的...