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Understanding slice notation
...nd I know that "abcdef"[::-1] is transformed to "abcdef"[6:-7:-1], so, the best way to explain would be: let len be the length of the sequence. If step is positive, the defaults for start and end are 0 and len. Else if step is negative, the defaults for start and end are len and -len - 1.
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How to convert an xml string to a dictionary?
...ested nearly 10 snippets / python modules / etc. for that. This one is the best I have found. According to my tests, it is : 1) much faster than github.com/martinblech/xmltodict (based on XML SAX api) 2) better than github.com/mcspring/XML2Dict which has some little issues when several childre...
Array extension to remove object by value
...o AnyObject, it must be a class (it cannot be a struct, enum, etc.).
Your best bet is to make it a function that accepts the array as an argument:
func removeObject<T : Equatable>(object: T, inout fromArray array: [T]) {
}
Or instead of modifying the original array, you can make your metho...
jQuery append fadeIn
...for the image to finish loading before it appears. Not sure if this is the best approach, but it worked for me.
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Check if something is (not) in a list in Python
...mory usage. If you don't already have a lookup around, it's not always the best choice to make/maintain one.
– wim
Feb 1 '19 at 20:41
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Converting an object to a string
...Item: [object Object] // not useful
Item: Object {a: 1, b: 2} // Best of both worlds! :)
Reference: https://developer.mozilla.org/en-US/docs/Web/API/Console.log
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Best implementation for hashCode method for a collection
How do we decide on the best implementation of hashCode() method for a collection (assuming that equals method has been overridden correctly) ?
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When NOT to use yield (return) [duplicate]
...a binary tree is lg n <= h <= n, that means that the algorithm is at best O(n lg n) and at worst O(n^2) in time, and best case O(lg n) and worse case O(n) in stack space. It is O(h) in heap space because each enumerator is allocated on the heap. (On implementations of C# I'm aware of; a confo...
Java ResultSet how to check if there are any results
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Best to use ResultSet.next() along with the do {...} while() syntax for this.
The "check for any results" call ResultSet.next() moves the cursor to the first row, so use the do {...} while() syntax to process that row while ...
How to create the perfect OOP application [closed]
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In reference to the last point: IMO best place for tax calculation is separate TaxCalculator class due to single resposibility principle.
– Radek
Feb 25 '12 at 16:29
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