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Preferred Java way to ping an HTTP URL for availability
...s <code>true</code> if the response code is in
* the 200-399 range.
* @param url The HTTP URL to be pinged.
* @param timeout The timeout in millis for both the connection timeout and the response read timeout. Note that
* the total timeout is effectively two times the given timeout....
Using jquery to get element's position relative to viewport
... @return {array} An array containing both X and Y positions as a number
* ranging from 0 (under/right of viewport) to 1 (above/left of viewport)
*/
function visibility(obj) {
var winw = jQuery(window).width(), winh = jQuery(window).height(),
elw = obj.width(), elh = obj.height(),
...
When to use volatile with multi threading?
...echanism for a release store to only flush itself and a few select address-ranges: it would have to sync everything because it wouldn't know what other threads might want to read if their acquire-load saw this release-store (forming a release-sequence that establishes a happens-before relationship a...
Fastest way to tell if two files have the same contents in Unix/Linux?
...nt hashes. The reality is though, that the hash space is finite, while the range of possible files to hash is not - eventually you will have a collision. In cryptology it's called the Birthday Attack.
– will
Feb 18 '16 at 9:51
...
Java NIO FileChannel versus FileOutputstream performance / usefulness
...at java.nio is faster than java.io. Solidly faster. Like in the >250% range. That said, I am eliminating obvious bottlenecks, which I suggest your micro-benchmark might suffer from. Potential areas for investigating:
The buffer size. The algorithm you basically have is
copy from disk to b...
Download large file in python with requests
...f'http://{url}'
logger.debug(f'New url: {url}')
for attempt in range(1, attempts+1):
try:
if attempt > 1:
time.sleep(10) # 10 seconds wait time between downloads
with requests.get(url, stream=True) as response:
response....
How to import an excel file in to a MySQL database
...sqlizer.io.
You upload an XLSX file to it, enter a sheet name and cell range, and it will generate a CREATE TABLE statement and a bunch of INSERT statements to import all your data into a MySQL database.
(Disclaimer: I help run SQLizer)
...
Correct way to convert size in bytes to KB, MB, GB in JavaScript
... decided to write a function that will solve each of these cases using the range of currently accepted units of measure.
There is a formatting bit at the end that will make the number look a bit better (at least to my eye) feel free to remove that formatting if it doesn't suit your purpose.
Enjoy....
How can I implement a tree in Python?
...
Python doesn't have the quite the extensive range of "built-in" data structures as Java does. However, because Python is dynamic, a general tree is easy to create. For example, a binary tree might be:
class Tree:
def __init__(self):
self.left = None
...
Changing the “tick frequency” on x or y axis in matplotlib?
...plicitly set where you want to tick marks with plt.xticks:
plt.xticks(np.arange(min(x), max(x)+1, 1.0))
For example,
import numpy as np
import matplotlib.pyplot as plt
x = [0,5,9,10,15]
y = [0,1,2,3,4]
plt.plot(x,y)
plt.xticks(np.arange(min(x), max(x)+1, 1.0))
plt.show()
(np.arange was us...