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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
...g frequently requested values. This method will always cache values in the range -128 to 127, inclusive, and may cache other values outside of this range.
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Creating an empty Pandas DataFrame, then filling it?
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Here's a couple of suggestions:
Use date_range for the index:
import datetime
import pandas as pd
import numpy as np
todays_date = datetime.datetime.now().date()
index = pd.date_range(todays_date-datetime.timedelta(10), periods=10, freq='D')
columns = ['A','B', '...
How to retry after exception?
I have a loop starting with for i in range(0, 100) . Normally it runs correctly, but sometimes it fails due to network conditions. Currently I have it set so that on failure, it will continue in the except clause (continue on to the next number for i ).
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Recursive sub folder search and return files in a list python
...er>"
RUNS = 20
def run_os_walk():
a = time.time_ns()
for i in range(RUNS):
fu = [os.path.join(dp, f) for dp, dn, filenames in os.walk(directory) for f in filenames if
os.path.splitext(f)[1].lower() == '.jpg']
print(f"os.walk\t\t\ttook {(time.time_ns() - a) ...
Python list iterator behavior and next(iterator)
...in addition to i being printed each iteration:
>>> a = iter(list(range(10)))
>>> for i in a:
... print(i)
... next(a)
...
0
1
2
3
4
5
6
7
8
9
So 0 is the output of print(i), 1 the return value from next(), echoed by the interactive interpreter, etc. There are just 5 itera...
How do you reindex an array in PHP?
...ou need it to start at one, then use the following:
$iOne = array_combine(range(1, count($arr)), array_values($arr));
Here are the manual pages for the functions used:
array_values()
array_combine()
range()
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Generate colors between red and green for a power meter?
...d green values. Assuming your max red/green/blue value is 255, and n is in range 0 .. 100
R = (255 * n) / 100
G = (255 * (100 - n)) / 100
B = 0
(Amended for integer maths, tip of the hat to Ferrucio)
Another way to do would be to use a HSV colour model, and cycle the hue from 0 degrees (red) to...
Change string color with NSAttributedString?
...ring = [[NSMutableAttributedString alloc]initWithString:self.text.text];
NSRange range=[self.myLabel.text rangeOfString:texts[sliderValue]]; //myLabel is the outlet from where you will get the text, it can be same or different
NSArray *colors=@[[UIColor redColor],
[UIColor redColo...
How to duplicate a whole line in Vim?
...urrent and next line at the beginning of the file (,+ is a synonym for the range .,.+1),
:1,t$ will copy lines from beginning till cursor position to the end (1, is a synonym for the range 1,.).
If you need to move instead of copying, use :m instead of :t.
This can be really powerful if you combi...
Loop through a date range with JavaScript
Given two Date() objects, where one is less than the other, how do I loop every day between the dates?
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