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No Exception while type casting with a null in java
...s the null value to String. So far I only had to cast null explicitly in a test where a method was overloaded and I wanted to test its behavior with null input. Still, good to know, I was about to write a similar answer before I found yours.
– Vlasec
Apr 13 '16...
Call An Asynchronous Javascript Function Synchronously
...e new to javascript. So it's currently not implemented by most browsers. I tested it in firefox, and for me it is nice way to wrap asynchronous function.
Here is example code from project GitHub
var { Deferred } = task;
spawn(function() {
out.innerHTML = "reading...\n";
try {
var ...
How can I convert an RGB image into grayscale in Python?
...
Three of the suggested methods were tested for speed with 1000 RGBA PNG images (224 x 256 pixels) running with Python 3.5 on Ubuntu 16.04 LTS (Xeon E5 2670 with SSD).
Average run times
pil : 1.037 seconds
scipy: 1.040 seconds
sk : 2.120 seconds
PIL and ...
How can I check if my python object is a number? [duplicate]
...
Test if your variable is an instance of numbers.Number:
>>> import numbers
>>> import decimal
>>> [isinstance(x, numbers.Number) for x in (0, 0.0, 0j, decimal.Decimal(0))]
[True, True, True, True]
...
How to retrieve an element from a set without removing it?
...formance might be important). As already shown by the other answers the fastest way is ForLoop.
However as long as one of the constant time approaches is used the performance difference will be negligible.
iteration_utilities (Disclaimer: I'm the author) contains a convenience function for this ...
How to get the current time as datetime
...
Tested with Swift 4
Getting the Current Date and Time
You can get the current date and time as simply as this:
let currentDateTime = Date()
However, Date is a 64-bit floating point number measuring the number of seconds sinc...
Why does Chrome incorrectly determine page is in a different language and offer to translate?
...ust like every other page in our app. This particular page is an internal testing page that has a few dozen form fields with English labels. I have no idea why Chrome thinks this page is Danish.
...
Regular expression to match URLs in Java
...essions. From its library I copied the regular expression to match URLs. I tested successfully within RegexBuddy. However, when I copied it as Java String flavor and pasted it into Java code, it does not work. The following class prints false :
...
How to switch position of two items in a Python list?
...
you can use for example:
>>> test_list = ['title', 'email', 'password2', 'password1', 'first_name',
'last_name', 'next', 'newsletter']
>>> reorder_func = lambda x: x.insert(x.index('password2'), x.pop(x.index('password2')+1))
&...
rsync copy over only certain types of files using include option
...-m flag will avoid creating empty directory structures in the destination. Tested in version 3.1.2.
So if we only want *.sh files we have to exclude all files --exclude="*", include all directories --include="*/" and include all *.sh files --include="*.sh".
You can find some good examples in the ...