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What is the difference between lower bound and tight bound?
...ga notation).
If I were lazy, I could say that binary search on a sorted array is O(n2), O(n3), and O(2n), and I would be technically correct in every case. That's because O-notation only specifies an upper bound, and binary search is bounded on the high side by all of those functions, just not v...
Getting the index of the returned max or min item using max()/min() on a list
... below) than a solution using itemgetter().
If you are dealing with numpy arrays or can afford numpy as a dependency, consider also using
import numpy as np
index_min = np.argmin(values)
This will be faster than the first solution even if you apply it to a pure Python list if:
it is larger tha...
How to check whether dynamically attached event listener exists or not?
...ement: element,
listeners: {}
};
/* Create an array for event in the record. */
record.listeners[event] = [];
/* Insert the record in the storage. */
CustomEventStorage.push(record);
}
/* Insert the listener to the event array. */
re...
How do I export UIImage array as a movie?
I have a serious problem: I have an NSArray with several UIImage objects. What I now want to do, is create movie from those UIImages . But I don't have any idea how to do so.
...
How do I sort a Set to a List in Java?
...e best. It is inefficient, as it creates a new List and an unnecessary new array. Also, it raises "unchecked" warnings because of the type safety issues around generic arrays.
Instead, use something like this:
public static
<T extends Comparable<? super T>> List<T> asSortedList(...
Update multiple rows in same query using PostgreSQL
.... I am trying to implement something like this in GoLang. So can I pass an array of structs in place for values? Something like this, from (values $1) Where $1 is an array of structs. In the above case, the strict would have id, first_name and last_name as properties.
– Reshma ...
Best practice to validate null and empty collection in Java
... then you can use CollectionUtils to check against both Collections (List, Array) and Map etc.
if(CollectionUtils.isEmpty(...)) {...}
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Split a String into an array in Swift?
.../ 2017
Xcode 8.1 / Swift 3.0.1
Here is the way multiple delimiters with array.
import Foundation
let mathString: String = "12-37*2/5"
let numbers = mathString.components(separatedBy: ["-", "*", "/"])
print(numbers)
Output:
["12", "37", "2", "5"]
...
URL rewriting with PHP
... // No path elements means home
ShowHomepage();
} else switch(array_shift($elements)) // Pop off first item and switch
{
case 'Some-text-goes-here':
ShowPicture($elements); // passes rest of parameters to internal function
break;
case 'more':
...
How do you access the matched groups in a JavaScript regular expression?
...rge strings. But if you need, the result can be easily transformed into an Array by using the spread syntax or the Array.from method:
function getFirstGroup(regexp, str) {
const array = [...str.matchAll(regexp)];
return array.map(m => m[1]);
}
// or:
function getFirstGroup(regexp, str) {
...