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What is the Ruby (spaceship) operator?
...
I will explain with simple example
[1,3,2] <=> [2,2,2]
Ruby will start comparing each element of both array from left hand side.
1 for left array is smaller than 2 of right array. Hence left array is smaller than right array. Output will be -1.
[2,3,2] <=> [2,2,2]
As above it will f...
Check to see if python script is running
...t to delete the file when you shut down cleanly, and check for it when you start up.
#/usr/bin/env python
import os
import sys
pid = str(os.getpid())
pidfile = "/tmp/mydaemon.pid"
if os.path.isfile(pidfile):
print "%s already exists, exiting" % pidfile
sys.exit()
file(pidfile, 'w').write...
How do I calculate percentiles with python/numpy?
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Starting Python 3.8, the standard library comes with the quantiles function as part of the statistics module:
from statistics import quantiles
quantiles([1, 2, 3, 4, 5], n=100)
# [0.06, 0.12, 0.18, 0.24, 0.3, 0.36, 0.42, 0...
How to disable Google Chrome auto update?
...and hit ENTER.
Find the plugin called 'Google Update' and click disable.
Restart your browser for the changes to take effect.
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C pointer to array/array of pointers disambiguation
...know if it has an official name, but I call it the Right-Left Thingy(TM).
Start at the variable, then go right, and left, and right...and so on.
int* arr1[8];
arr1 is an array of 8 pointers to integers.
int (*arr2)[8];
arr2 is a pointer (the parenthesis block the right-left) to an array of 8 ...
Significance of -pthread flag when compiling
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Try:
gcc -dumpspecs | grep pthread
and look for anything that starts with %{pthread:.
On my computer, this causes files to be compiled with -D_REENTRANT, and linked with -lpthread. On other platforms, this could differ. Use -pthread for most portability.
Using _REENTRANT, on GNU libc,...
Inner text shadow with CSS
...SS:
h1 {
color: black;
background-color: #cc8100;
}
Step 1
Let's start by making the text transparent:
h1 {
color: transparent;
background-color: #cc8100;
}
Step 2
Now, we crop that background to the shape of the text:
h1 {
color: transparent;
background-color: #cc8100;
ba...
What is console.log?
...logos for each command.
You can also use console.profile(profileName); to start profiling a function, script etc. And then end it with console.profileEnd(profileName); and it will show up in you Profiles tab in Chrome (don't know with FF).
For a complete reference go to http://getfirebug.com/loggi...
CSS styling in Django forms
...es would display. I just cleared the cache from chrome and all the updates started showing.
– almost a beginner
Dec 28 '16 at 2:22
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Android ViewPager - Show preview of page on left and right
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Same problem on oreo devices, padding start and end works as expected on other devices but oreo after ViewPager2. PageTransformer resolved the issue, paddings are still same and I had to add viewpager.setPageTransformer { page, position -> page.tra...