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Finding duplicates in O(n) time and O(1) space
Input: Given an array of n elements which contains elements from 0 to n-1, with any of these numbers appearing any number of times.
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How to modify a specified commit?
...ommit as well as all children -- in other words, this rewrites the history from that point forward. You can break repos doing this if you push using the command git push --force
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List files ONLY in the current directory
...st all the files in the current directory ONLY. I do not want files listed from any sub directory or parent.
8 Answers
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How do I draw a grid onto a plot in Python?
... python
#-*- coding: utf-8 -*-
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from matplotlib.figure import Figure
from matplotlib.backends.backend_gtk3agg import FigureCanvasGTK3Agg as FigureCanvas
win = Gtk.Window()
win.connect("delete-event", Gtk.main_quit)
win.set_tit...
How do I shuffle an array in Swift?
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let x = [1, 2, 3].shuffled()
// x == [2, 3, 1]
let fiveStrings = stride(from: 0, through: 100, by: 5).map(String.init).shuffled()
// fiveStrings == ["20", "45", "70", "30", ...]
var numbers = [1, 2, 3, 4]
numbers.shuffle()
// numbers == [3, 2, 1, 4]
Swift 4.0 and 4.1
These extensions add a sh...
Why would an Enum implement an Interface?
... reflection techniques to expose private methods as public
for inheriting from your singleton and overriding your singleton's methods with something else
Enums as singletons help to prevent these security issues. This might have been one of the contributing reasons to let Enums act as classes an...
What is the difference between Cloud, Grid and Cluster? [closed]
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Cluster differs from Cloud and Grid in that a cluster is a group of computers connected by a local area network (LAN), whereas cloud and grid are more wide scale and can be geographically distributed. Another way to put it is to say that a c...
Converting a Date object to a calendar object [duplicate]
So I get a date attribute from an incoming object in the form:
3 Answers
3
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Deleting a file in VBA
...Object is a really useful tool and well worth getting friendly with. Apart from anything else, for text file writing it can actually sometimes be faster than the legacy alternative, which may surprise a few people. (In my experience at least, YMMV).
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How to check if there exists a process with a given pid in Python?
...to check to see if a pid corresponds to a valid process? I'm getting a pid from a different source other than from os.getpid() and I need to check to see if a process with that pid doesn't exist on the machine.
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