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How is malloc() implemented internally? [duplicate]

...it). So you have two methods of getting more memory from the kernel: sbrk and mmap. There are various strategies on how to organize the memory that you've got from the kernel. One naive way is to partition it into zones, often called "buckets", which are dedicated to certain structure sizes. For e...
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Combine Date and Time columns using python pandas

... You can cast the columns if the types are different (datetime and timestamp or str) and use to_datetime : df.loc[:,'Date'] = pd.to_datetime(df.Date.astype(str)+' '+df.Time.astype(str)) Result : 0 2013-01-06 23:00:00 1 2013-...
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How to convert hashmap to JSON object in Java

How to convert or cast hashmap to JSON object in Java, and again convert JSON object to JSON string? 29 Answers ...
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How can I filter a date of a DateTimeField in Django?

...lementedError: subclasses of basedatabaseoperations may require a datetime_cast_date() method – AbdurRehman Khan Oct 1 '19 at 7:04 add a comment  |  ...
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JavaScript unit test tools for TDD

I've looked into and considered many JavaScript unit tests and testing tools, but have been unable to find a suitable option to remain fully TDD compliant. So, is there a JavaScript unit test tool that is fully TDD compliant? ...
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Package cairo was not found in the pkg-config search path. Node j.s install canvas issue

... Had the same problem and @Epistemex's link helped me troubleshoot it. ... You need to install libcairo2-dev, libjpeg-dev and libgif-dev packages ... sudo apt-get install libcairo2-dev libjpeg-dev libgif-dev ...
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Intellij shortcut to convert code to upper or lower case?

... Ctrl + Shift + U In the future try typing: Ctrl + Shift + A and look for any actions you like. Here: Toggle Case. Or ⌘ Command + Shift + U if you are using Mac OSX. share | improve...
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Change the default editor for files opened in the terminal? (e.g. set it to TextEdit/Coda/Textmate)

...tions/TextEdit.app/Contents/MacOS/TextEdit" or just type the following command into your Terminal: echo "export EDITOR=\"/Applications/TextEdit.app/Contents/MacOS/TextEdit\"" >> ~/.bashrc If you are using zsh, use ~/.zshrc instead of ~/.bashrc. ...
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dynamically add and remove view to viewpager

... After figuring out which ViewPager methods are called by ViewPager and which are for other purposes, I came up with a solution. I present it here since I see a lot of people have struggled with this and I didn't see any other relevant answers. First, here's my adapter; hopefully comments ...
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How to ignore the certificate check when ssl

... I'm using WebRequest, which gets cast to HttpWebRequest, such as: ((HttpWebRequest)request).Accept = contentType; – B. Clay Shannon Dec 29 '14 at 18:38 ...