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Are static variables shared between threads?
...y the JVM's memory model. Here's an article talking about the memory model and how writes become visible to threads. You can't count on changes one thread makes becoming visible to other threads in a timely manner (actually the JVM has no obligation to make those changes visible to you at all, in an...
How many bytes does one Unicode character take?
...ough it sure does try.
Unicode itself is a mapping, it defines codepoints and a codepoint is a number, associated with usually a character. I say usually because there are concepts like combining characters. You may be familiar with things like accents, or umlauts. Those can be used with another ch...
Renaming files in a folder to sequential numbers
...
Try to use a loop, let, and printf for the padding:
a=1
for i in *.jpg; do
new=$(printf "%04d.jpg" "$a") #04 pad to length of 4
mv -i -- "$i" "$new"
let a=a+1
done
using the -i flag prevents automatically overwriting existing files.
...
How do I detect if I am in release or debug mode?
...
The simplest, and best long-term solution, is to use BuildConfig.DEBUG. This is a boolean value that will be true for a debug build, false otherwise:
if (BuildConfig.DEBUG) {
// do something for a debug build
}
There have been reports...
SQLite select where empty?
...n I select records where some_column is empty?
Empty counts as both NULL and "".
4 Answers
...
How to sort a Ruby Hash by number value?
... results, since it would not sort by string value... You should reverse a1 and a2 in your example
Best way in any case (as per Mladen) is:
metrics = {"sitea.com" => 745, "siteb.com" => 9, "sitec.com" => 10 }
metrics.sort_by {|_key, value| value}
# ==> [["siteb.com", 9], ["sitec.com",...
Example use of “continue” statement in Python?
... the past three or four days, why would I ever need a 'continue' statement and then I run into this post which in turn helps me with some QA — many thanks!
– Freddy
Mar 10 '16 at 5:56
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Is it possible to hide extension resources in the Chrome web inspector network tab?
...ed for it here https://code.google.com/p/chromium/issues/detail?id=239401 and now it is possible.
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Check whether an input string contains a number in javascript
...
Exactly what I needed. Thanks
– AndyH
Oct 18 '16 at 7:35
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Trusting all certificates using HttpClient over HTTPS
...SSLSocketFactory
itself. Some clues can be found in this post Custom SSL handling stopped working on Android 2.2 FroYo.
An example is like ...
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.securi...