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How to determine the longest increasing subsequence using dynamic programming?
... S, which is >= than X, and change it to X.
Because S is sorted at any time, the element can be found using binary search in log(N).
Total runtime - N integers and a binary search for each of them - N * log(N) = O(N log N)
Now let's do a real example:
Collection of integers:
2 6 3 4 1 2 9 5 ...
How to merge dictionaries of dictionaries?
...s, this is so helpful. I am having lists of dicts in my structures all the time, the other solutions cannot properly merge this.
– SHernandez
Sep 8 '15 at 8:39
add a comment
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Replacing a char at a given index in string? [duplicate]
...ried with a little benchmark on 100k iterations, ToCharArray is at least 2 time faster.
– Matteo Migliore
May 13 '13 at 8:55
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What is the difference between the kernel space and the user space?
...ler: I'm not sure what gave you that idea, but no, not at all. At the same time, a user-space process will normally have some (more or less hidden) kernel-space memory, so (for example) your process will have a user-space stack, and a kernel-space stack that's used when you make OS calls that need t...
Android Split string
... for this! Also useful for separating hour and minute when creating a new Time object.
– worked
Sep 28 '11 at 12:24
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How to serialize an object into a string
... The fatal flaw in this is that class definitions tend to change over time - if such a change occurs you will be unable to deserialize! Adding a serialVersionUID to SomeClass will protect against new fields being added but if fields are removed you'll be screwed. It's worth reading what Joshu...
How to perform static code analysis in php? [closed]
...el analyzers include:
PHP_Parser
token_get_all (primitive function)
Runtime analyzers, which are more useful for some things due to PHPs dynamic nature, include:
Xdebug has code coverage and function traces.
My PHP Tracer Tool uses a combined static/dynamic approach, building on Xdebug's funct...
What is a handle in C++?
...std::vector. Your object may be at different memory locations at different times during execution of a program, which means your pointer to that memory will change values. With a handle it never changes, it always references your object. Imagine saving a state of a program (like in a game) - you wou...
Immutable array in Java
...sn't influence the original array, then you'd need to clone the array each time:
public int[] getFooArray() {
return fooArray == null ? null : fooArray.clone();
}
Obviously this is rather expensive (as you'll create a full copy each time you call the getter), but if you can't change the interfa...
How to find and return a duplicate value in array
... Except quadratic for something that can be solved in linear time.
– jasonmp85
Mar 28 '13 at 7:47
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