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Are lists thread-safe?
I notice that it is often suggested to use queues with multiple threads, instead of lists and .pop() . Is this because lists are not thread-safe, or for some other reason?
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Convert .pem to .crt and .key
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I was able to convert pem to crt using this:
openssl x509 -outform der -in your-cert.pem -out your-cert.crt
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Python 3.x rounding behavior
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Python 3's way (called "round half to even" or "banker's rounding") is considered the standard rounding method these days, though some language implementations aren't on the bus yet.
The simple "always round 0.5 up" technique results in a slight bias toward the higher number. With large numbe...
How to make input type= file Should accept only pdf and xls
... it automatically should open.":
You can't achieve that. How a PDF or XLS is opened on the client machine is set by the user.
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Passing an integer by reference in Python
...that object (if possible). However, integers are immutable. One workaround is to pass the integer in a container which can be mutated:
def change(x):
x[0] = 3
x = [1]
change(x)
print x
This is ugly/clumsy at best, but you're not going to do any better in Python. The reason is because in Pyth...
Android Studio Project Structure (v.s. Eclipse Project Structure)
... by the different project structures between Eclipse and Android Studio. This makes it difficult to follow tutorials designed for Eclipse. Could anyone let me know why these differences exist? Should they exist?
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What is the javascript filename naming convention? [closed]
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One possible naming convention is to use something similar to the naming scheme jQuery uses. It's not universally adopted but it is pretty common.
product-name.plugin-ver.sion.filetype.js
where the product-name + plugin pair can also represent a namespa...
Restful way for deleting a bunch of items
In wiki article for REST
it is indicated that if you use http://example.com/resources DELETE, that means you are deleting the entire collection.
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Delete column from pandas DataFrame
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As you've guessed, the right syntax is
del df['column_name']
It's difficult to make del df.column_name work simply as the result of syntactic limitations in Python. del df[name] gets translated to df.__delitem__(name) under the covers by Python.
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What is NSLayoutConstraint “UIView-Encapsulated-Layout-Height” and how should I go about forcing it
... UIView-Encapsulated-Layout-Height constraint always takes precedence.
It is based on what you return in -tableView:heightForRowAtIndexPath:. Make sure to return the right value and your own constraint and the generated one should be the same. The lower priority for your own constraint is only nee...