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Get HTML5 localStorage keys
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and I assume Object.keys() works as expected as well?
– user12834955
Mar 12 at 0:30
add a comment
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Size of Matrix OpenCV
...ou please tell me how to obtain the size of a matrix in OpenCV?. I googled and I am still searching, but if any of you know the answer, please help me.
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Easiest way to check for an index or a key in an array?
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To check if the element is set (applies to both indexed and associative array)
[ ${array[key]+abc} ] && echo "exists"
Basically what ${array[key]+abc} does is
if array[key] is set, return abc
if array[key] is not set, return nothing
References:
See Parameter Expa...
JMS Topic vs Queues
I was wondering what is the difference between a JMS Queue and JMS Topic.
9 Answers
9
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When is memoization automatic in GHC Haskell?
... in foldl' (+) 0 (y ++ [x])
GHC might notice that y does not depend on x and rewrite the function to
f = let y = [1..30000000] in \x -> foldl' (+) 0 (y ++ [x])
In this case, the new version is much less efficient because it will have to read about 1 GB from memory where y is stored, while th...
How to append a newline to StringBuilder
...erlying operating system, otherwise use '\n'.
– tuscland
Jun 2 '15 at 7:05
2
@tuscland - Why not ...
What is the difference between LL and LR parsing?
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At a high level, the difference between LL parsing and LR parsing is that LL parsers begin at the start symbol and try to apply productions to arrive at the target string, whereas LR parsers begin at the target string and try to arrive back at the start symbol.
An LL parse i...
How to initialize HashSet values by construction?
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There is a shorthand that I use that is not very time efficient, but fits on a single line:
Set<String> h = new HashSet<>(Arrays.asList("a", "b"));
Again, this is not time efficient since you are constructing an array, converti...
Difference between Convert.ToString() and .ToString()
What is the difference between Convert.ToString() and .ToString() ?
19 Answers
19
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What is the difference between the dot (.) operator and -> in C++? [duplicate]
What is the difference between the dot (.) operator and -> in C++?
14 Answers
14
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