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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...\n') + (not data.endswith('\n')) # Accurate and fast
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Question from @Kaz: Why the heck are two very different algorithms shoe-horned into a single function?
The signature for str.split is about 20 years old, and a number of the APIs from that era are strictly pragmatic.
While not perfe...
What does threadsafe mean?
Recently I tried to Access a textbox from a thread (other than the UI thread) and an exception was thrown. It said something about the "code not being thread safe" and so I ended up writing a delegate (sample from MSDN helped) and calling it instead.
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Show compose SMS view in Android
...at you want to send the message to
You can add a message to the SMS with (from comments):
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("sms:" + phoneNumber));
intent.putExtra("sms_body", message);
startActivity(intent);
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Best way to center a on a page vertically and horizontally? [duplicate]
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The main trick in this demo is that in the normal flow of elements going from top to bottom, so the margin-top: auto is set to zero. However, an absolutely positioned element acts the same for distribution of free space, and similarly can be centered vertically at the specified top and bottom (doe...
What is the JavaScript >>> operator and how do you use it?
I was looking at code from Mozilla that add a filter method to Array and it had a line of code that confused me.
7 Answers
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Does a finally block run even if you throw a new Exception?
... for must-run logic. If it must-run do it before the try-catch block, away from something that could throw an exception, as your intention is almost certainly functionally the same.
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How can I clear or empty a StringBuilder? [duplicate]
...ngth to zero. The remaining allocations are still there. This answer stems from the javascript length = 0 for arrays, which performs a magical operation to mark the array reusable, but even there i am not sure, and don't trust it. The underlying array will never be garbage collected.
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JavaScript and Threads
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The words you want to google for are JavaScript Worker Threads
Apart from from Gears there's nothing available right now, but there's plenty of talk about how to implement this so I guess watch this question as the answer will no doubt change in future.
Here's the relevant documentation for G...
Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
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There are at least 6 (!) ways to clone an array:
loop
slice
Array.from()
concat
spread operator (FASTEST)
map A.map(function(e){return e;});
There has been a huuuge BENCHMARKS thread, providing following information:
for blink browsers slice() is the fastest method, concat() is a bit slow...
Python string class like StringBuilder in C#?
...gs that fulfill similar purposes:
One common way to build large strings from pieces is to grow a list of strings and join it when you are done. This is a frequently-used Python idiom.
To build strings incorporating data with formatting, you would do the formatting separately.
For insertion an...