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What is the difference between trie and radix trie data structures?
...you wan to search the next char you need to see the ith index in the child array of the current node but in radix tree you need search for all the child nodes sequentially. See the implementation code.google.com/p/radixtree/source/browse/trunk/RadixTree/src/…
– Trying
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comparing 2 strings alphabetically for sorting purposes
...);
It returns -1 since "a" < "b", 1 or 0 otherwise, like you need for Array.prototype.sort()
Keep in mind that sorting is locale dependent. E.g. in German, ä is a variant of a, so "ä".localeCompare("b", "de-DE") returns -1. In Swedish, ä is one of the last letters in the alphabet, so "ä".l...
Rotating a two-dimensional array in Python
In a program I'm writing the need to rotate a two-dimensional array came up. Searching for the optimal solution I found this impressive one-liner that does the job:
...
How many characters can a Java String have?
...3,647 (231 - 1)
(Defined by the Java specification, the maximum size of an array, which the String class uses for internal storage)
OR
Half your maximum heap size (since each character is two bytes) whichever is smaller.
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Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
...efault, be deserialized into a Collection because it's not actually a JSON Array - that would look like this:
[
{
"name": "Test order1",
"detail": "ahk ks"
},
{
"name": "Test order2",
"detail": "Fisteku"
}
]
Since you're not controlling the exact p...
Why would iterating over a List be faster than indexing through it?
...l, which is O(N).
Now, going to the other implementation of List which is ArrayList, that one is backed by a simple array. In that case both of the above traversals are equivalent, since an array is contiguous so it allows random jumps to arbitrary positions.
...
How to find a min/max with Ruby
...ncludes Enumerable will have those methods available.
v2.4 introduces own Array#min and Array#max, which are way faster than Enumerable's methods because they skip calling #each.
@nicholasklick mentions another option, Enumerable#minmax, but this time returning an array of [min, max].
[4, 5, 7, 1...
How to get innerHTML of DOMNode?
...ctional programming style:
function innerHTML($node) {
return implode(array_map([$node->ownerDocument,"saveHTML"],
iterator_to_array($node->childNodes)));
}
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Regular expression to get a string between two strings in Javascript
...so gives milk";
const matches = s.matchAll(/cow (.*?) milk/g);
console.log(Array.from(matches, x => x[1]));
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Send a file via HTTP POST with C#
...new StreamContent(paramFileStream);
HttpContent bytesContent = new ByteArrayContent(paramFileBytes);
using (var client = new HttpClient())
using (var formData = new MultipartFormDataContent())
{
formData.Add(stringContent, "param1", "param1");
formData.Add(fileStreamC...