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Check if a value exists in pandas dataframe index
...d with column headings rather than an index, e.g.: df = pandas.DataFrame({'test':[1,2,3,4]}, columns=['a','b','c','d'])
– Tahlor
Jun 22 '18 at 14:54
...
How to remove all line breaks from a string
...plest solution would be:
let str = '\t\n\r this \n \t \r is \r a \n test \t \r \n';
str.replace(/\s+/g, ' ').trim();
console.log(str); // logs: "this is a test"
.replace() with /\s+/g regexp is changing all groups of white-spaces characters to a single space in the whole string then we .tr...
What's the difference between the various methods to get a Context?
...hoose among your choices.
So here is my conclusion: I suppose (I have not tested it further) than the baseContext is required when dealing with contextMenu in your Activity...
The test has been done coding with API 8, and tested on an HTC Desire, android 2.3.3.
I hope my comment have not bored yo...
Get Image size WITHOUT loading image into memory
... the output of the python magic module:
>>> t = magic.from_file('teste.png')
>>> t
'PNG image data, 782 x 602, 8-bit/color RGBA, non-interlaced'
>>> re.search('(\d+) x (\d+)', t).groups()
('782', '602')
This is a wrapper around libmagic which read as few bytes as possib...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
...
How to convert string to boolean php
... then you'll need to check for the presence or otherwise of that value.
$test_mode_mail = $string === 'true'? true: false;
EDIT: the above code is intended for clarity of understanding. In actual use the following code may be more appropriate:
$test_mode_mail = ($string === 'true');
or mayb...
Given final block not properly padded
...ause it doesn't work @fpacifici and I updated my post I included the JUnit test that tests the encryption and decryption
– Altrim
Nov 8 '11 at 15:36
...
How to get current working directory in Java?
...ardless where the .class or .jar file the .class file is in.
public class Test
{
public static void main(final String[] args)
{
final String dir = System.getProperty("user.dir");
System.out.println("current dir = " + dir);
}
}
if you are in /User/me/ and your .jar fi...
What is the “hasClass” function with plain JavaScript?
...Query's implementation is better and more reliable. For example: /\bbig\b/.test('big-text') returns true instead of expected false.
– Stano
Jun 18 '13 at 18:43
...
What is the relative performance difference of if/else versus switch statement in Java?
...
Use switch!
I hate to maintain if-else-blocks! Have a test:
public class SpeedTestSwitch
{
private static void do1(int loop)
{
int temp = 0;
for (; loop > 0; --loop)
{
int r = (int) (Math.random() * 10);
switch (r)
...