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How to declare constant map
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edited Feb 23 '17 at 22:50
Robert P
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Format output string, right alignment
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232
Try this approach using the newer str.format syntax:
line_new = '{:>12} {:>12} {:>1...
Boolean.hashCode()
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1231 and 1237 are just two (sufficiently large) arbitrary prime numbers. Any other two large prime numbers would do fine.
Why primes?
Suppose for a second that we picked composite numbers (non-primes), say 1000 and 2000. When ...
Cast to int vs floor
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edited Dec 30 '14 at 21:44
Matt Ball
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Remove empty strings from a list of strings
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1203
I would use filter:
str_list = filter(None, str_list)
str_list = filter(bool, str_list)
str_lis...
What is a 'semantic predicate' in ANTLR?
... of semantic predicates in Antlr4
Semantic predicates in ANTLR4?
ANTLR 3
A semantic predicate is a way to enforce extra (semantic) rules upon grammar
actions using plain code.
There are 3 types of semantic predicates:
validating semantic predicates;
gated semantic predicates;
disambiguating...
Are 2^n and n*2^n in the same time complexity?
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232
You will have to go to the formal definition of the big O (O) in order to answer this question....
PostgreSQL - Rename database
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answered Sep 27 '08 at 15:03
bmdhacksbmdhacks
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In C/C++ what's the simplest way to reverse the order of bits in a byte?
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35 Answers
35
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Change text color based on brightness of the covered background area?
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Interesting resources for this:
W3C - Ensure that foreground and background color combinations provide sufficient contrast
Calculating the Perceived Brightness of a Color
Here's the W3C algorithm (with JSFiddle demo too):
const rgb = [255, 0, 0];
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