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Display image as grayscale using matplotlib
...me).convert("L")
arr = np.asarray(image)
plt.imshow(arr, cmap='gray', vmin=0, vmax=255)
plt.show()
If you want to display the inverse grayscale, switch the cmap to cmap='gray_r'.
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Java to Clojure rewrite
I have just been asked by my company to rewrite a largish (50,000 single lines of code) Java application (a web app using JSP and servlets) in Clojure. Has anyone else got tips as to what I should watch out for?
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Where does forever store console.log output?
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edited Apr 21 '17 at 20:12
answered Jan 9 '14 at 13:11
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How to calculate a Mod b in Casio fx-991ES calculator
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10 Answers
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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
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@NotNull is a JSR 303 Bean Validation annotation. It has nothing to do with database constraints...
In MySQL queries, why use join instead of where?
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Where supported (Oracle 9i+, PostgreSQL 7.2+, MySQL 3.23+, SQL Server 2000+), there is no performance benefit to using either syntax over the other. The optimizer sees them as the same query. But more complex queries can benefit from using ANSI-92 syntax:
Ability to control JOIN order - the ...
How to show soft-keyboard when edittext is focused
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650
To force the soft keyboard to appear, you can use
EditText yourEditText= (EditText) findViewByI...
C++11 std::threads vs posix threads
... Win64 it just does not work or has severe performance bottlenecks (as of 2012).
A good replacement is boost::thread - it is very similar to std::thread (actually it is from the same author) and works reliably, but, of course, it introduces another dependency from a third party library.
Edit: As...
Why does the C# compiler not fault code where a static method calls an instance method?
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UPDATE: Below answer was written in 2012, before the introduction of C# 7.3 (May 2018). In What's new in C# 7.3, the section Improved overload candidates, item 1, it is explained how the overload resolution rules have changed so that non-static overloads are dis...
What does 'require: false' in Gemfile mean?
...ch time, so more = slower, according to confreaks.com/videos/2668-gogaruco2013-measuring-ruby
– Nathan Long
Oct 12 '13 at 14:11
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