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What is an idempotent operation?
What is an idempotent operation?
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Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
One mistake I see people making over and over again is trying to parse XML or HTML with a regex. Here are a few of the reasons parsing XML and HTML is hard:
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Git blame — prior commits?
Is it possible to see who edited a specific line before the commit reported by git blame , like a history of commits for a given line?
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What's a “static method” in C#?
What does it mean when you add the static keyword to a method?
9 Answers
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pandas GroupBy columns with NaN (missing) values
I have a DataFrame with many missing values in columns which I wish to groupby:
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What does it mean to inflate a view from an xml file?
I am new to android development and keep coming across references to Inflating views from a layout xml file. I googled and searched the development guide but still wasn't able to pick up a sense for what it means. If someone could provide a very simple example, it'd be much appreciated.
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How do you Encrypt and Decrypt a PHP String?
What I mean is:
10 Answers
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Best Practice: Initialize JUnit class fields in setUp() or at declaration?
Should I initialize class fields at declaration like this?
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How can I lock a file using java (if possible)
I have a Java process that opens a file using a FileReader. How can I prevent another (Java) process from opening this file, or at least notify that second process that the file is already opened? Does this automatically make the second process get an exception if the file is open (which solves my p...
Why '&&' and not '&'?
Why is && preferable to & and || preferable to | ?
16 Answers
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