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Curly braces in string in PHP

What is the meaning of { } (curly braces) in string literals in PHP? 5 Answers 5 ...
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Combining two expressions (Expression)

I have two expressions of type Expression<Func<T, bool>> and I want to take to OR, AND or NOT of these and get a new expression of the same type ...
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pyplot axes labels for subplots

I have the following plot: 7 Answers 7 ...
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Python speed testing - Time Difference - milliseconds

What is the proper way to compare 2 times in Python in order to speed test a section of code? I tried reading the API docs. I'm not sure I understand the timedelta thing. ...
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Numpy how to iterate over columns of array?

Suppose I have and m x n array. I want to pass each column of this array to a function to perform some operation on the entire column. How do I iterate over the columns of the array? ...
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Can I have an IF block in DOS batch file?

In a DOS batch file we can only have 1 line if statement body? I think I found somewhere that I could use () for an if block just like the {} used in C-like programming languages, but it is not executing the statements when I try this. No error message either. This my code: ...
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How I can I lazily read multiple JSON values from a file/stream in Python?

I'd like to read multiple JSON objects from a file/stream in Python, one at a time. Unfortunately json.load() just .read() s until end-of-file; there doesn't seem to be any way to use it to read a single object or to lazily iterate over the objects. ...
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How to convert char to int?

What is the proper way to convert a char to int ? This gives 49 : 11 Answers 11 ...
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Will strlen be calculated multiple times if used in a loop condition?

I'm not sure if the following code can cause redundant calculations, or is it compiler-specific? 18 Answers ...
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Open a file from Cygwin

Is there an equivalent to OSX open command in cygwin. open opens a file with the default application for that type. 7 A...