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What is the exact meaning of IFS=$'\n'?
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ANSI C-quoted strings is a key point. Thanks to @mklement0 .
You can test ANSI C-quoted strings with command od.
echo -n $'\n' | od -c
echo -n '\n' | od -c
echo -n $"\n" | od -c
echo -n "\n" | od -c
Outputs:
0000000 \n
0000001
0000000 \ n
0000002
0000000 \ n
0000002
000...
ExecutorService that interrupts tasks after a timeout
...ted successfully.
You can see the problem with the following (very crude) test program:
public static void main(String[] args) throws InterruptedException {
ExecutorService service = new TimeoutThreadPoolExecutor(1, 1, 10, TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(...
How to create dictionary and add key–value pairs dynamically?
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var dict = {};
dict['key'] = "testing";
console.log(dict);
works just like python :)
console output:
Object {key: "testing"}
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Why does sun.misc.Unsafe exist, and how can it be used in the real world?
...xception in the Dynamic Implementation of the Interface.
import org.junit.Test;
/** need to allow forbidden references! */ import sun.misc.Unsafe;
/**
* Demonstrate how to throw an undeclared checked exception.
* This is a hack, because it uses the forbidden Class {@link sun.misc.Unsafe}.
*/
pu...
Convert boolean result into number/integer
...and guarantee the input, go urary, otherwise methinks the ternary + truthy test is best.
– gdibble
Jun 13 '17 at 18:31
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Why would you use String.Equals over ==? [duplicate]
...string with two characters "Hi", but myItem == "Hi" or "Hi" == myItem will test reference equality. The "Option Strict On" dialect of VB.NET is better in that regard. Its "=" operator tests either tests value equality or won't compile; for a reference-equality check, one uses the "Is" operator.
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What is difference between functional and imperative programming languages?
...all your pure method at will without worrying about side effects.
Easier testing and debugging. Because pure functions can more easily be tested in isolation, you can write test code that calls the pure function with typical values, valid edge cases, and invalid edge cases.
For OOP People or
Imp...
PHP and MySQL - how to avoid password in source code? [duplicate]
...could have a different configuration file for production, development, and testing platforms.
An environment variable is the most common way to differentiate between these environments, something like the below code:
// Check if it's been set by the web server
if (!empty($_ENV['ENVIRONMENT'])) {
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How do I use Java to read from a file that is actively being written to?
... file, while reading this very same file every 2500 ms
public class TailerTest
{
public static void main(String[] args)
{
File f = new File("/tmp/test.txt");
MyListener listener = new MyListener();
Tailer.create(f, listener, 2500);
try
{
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Uninstall all installed gems, in OSX?
...a sane list of default gems which for me is: "gem install bundler json minitest rake rdoc"
– Wil Moore III
May 2 '12 at 8:33
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