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Why do we use arrays instead of other data structures?
...t is in memory. All I know is where the root (P1) is, so instead I have to start at P1, and follow each pointer to the desired node.
This is a O(N) look up time (The look up cost increases as each element is added). It is much more expensive to get to P1000 compared to getting to P4.
Higher level...
onchange event on input type=range is not triggering in firefox while dragging
.../slider usage. Five scenarios are relevant:
initial mouse-down (or touch-start) at the current slider position
initial mouse-down (or touch-start) at a new slider position
any subsequent mouse (or touch) movement after 1 or 2 along the slider
any subsequent mouse (or touch) movement after 1 or 2 p...
How can you get the SSH return code using Paramiko?
...licy())
#client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
def start():
try :
client.connect('127.0.0.1', port=22, username='ubuntu', password=pw)
return True
except Exception as e:
#client.close()
print(e)
return False
while start():
...
Is there a perfect algorithm for chess? [closed]
...inite. Huge, but finite. There's perfect information. There are defined start and end-states, There are no coin-tosses or dice rolls.
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How to write a multidimensional array to a text file?
... commented out lines. By default, numpy.loadtxt will ignore any lines that start with # (or whichever character is specified by the comments kwarg). (This looks more verbose than it actually is...)
import numpy as np
# Generate some test data
data = np.arange(200).reshape((4,5,10))
# Write the ar...
How do I use the nohup command without getting nohup.out?
...nning program ("process") has its own set of these, and when a new process starts up it has three of them already open: "standard input", which is fd 0, is open for the process to read from, while "standard output" (fd 1) and "standard error" (fd 2) are open for it to write to. If you just run a com...
How do you close/hide the Android soft keyboard using Java?
...as a parameter:
view = fragment.getView().getRootView().getWindowToken();
Starting from your content body:
view = findViewById(android.R.id.content).getRootView().getWindowToken();
UPDATE 2: Clear focus to avoid showing keyboard again if you open the app from the background
Add this line to the e...
NSOperation vs Grand Central Dispatch
...onQueues within my applications for managing concurrency. However, since I started using GCD on a regular basis, I've almost entirely replaced NSOperations and NSOperationQueues with blocks and dispatch queues. This has come from how I've used both technologies in practice, and from the profiling I'...
How do I use vi keys in ipython under *nix?
...
You may set vi in your .ipython start-up config file. Create one if you don't have it by adding a file to ~/.ipython/profile_default/startup/ called something like start.py. Here's an example:
# Initializing script for ipython in ~/.ipython/profile_def...
How to hide image broken Icon using only CSS/HTML?
...g. When objects fail they don't show broken icons; they just do nothing. Starting with IE8, you can use Object and Img tags interchangeably. You can resize and do all the glorious stuff you can with regular images too. Don't be afraid of the object tag; it's just a tag, nothing big and bulky get...