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What is a 'semantic predicate' in ANTLR?
What is a semantic predicate in ANTLR?
2 Answers
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str performance in python
While profiling a piece of python code ( python 2.6 up to 3.2 ), I discovered that the
str method to convert an object (in my case an integer) to a string is almost an order of magnitude slower than using string formatting.
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How to find list of possible words from a letter matrix [Boggle Solver]
Lately I have been playing a game on my iPhone called Scramble. Some of you may know this game as Boggle. Essentially, when the game starts you get a matrix of letters like so:
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How to identify server IP address in PHP
How can I identify the server IP address in PHP?
15 Answers
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What is the difference between & and && in Java?
I always thought that && operator in Java is used for verifying whether both its boolean operands are true , and the & operator is used to do Bit-wise operations on two integer types.
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COUNT DISTINCT with CONDITIONS
I want to count the number of distinct items in a column subject to a certain condition, for example if the table is like this:
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How to use arguments from previous command?
I know that Esc + . gives you the last argument of the last command.
11 Answers
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Why is null an object and what's the difference between null and undefined?
Why is null considered an object in JavaScript?
21 Answers
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In Python, what is the difference between “.append()” and “+= []”?
What is the difference between:
12 Answers
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Using jquery to get element's position relative to viewport
What's the proper way to get the position of an element on the page relative to the viewport (rather than the document). jQuery.offset function seemed promising:
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