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Check status of one port on remote host [closed]
I need a command line that can check the port status on a remote host. I tried ping xxx.xxx.xxx.xxx:161 but it doesn't recognize the "host". I thought it was a "good" answer until I did the same command against a host I know has that port open. This is for a batch file on Windows that will chec...
Copy a stream to avoid “stream has already been operated upon or closed”
...ack if you're only going to use the data once, because you don't have to store it, and streams give you powerful "loop fusion" optimizations that let you flow the whole data efficiently through the pipeline.
If you want to re-use the same data, then by definition you either have to generate it tw...
Phone: numeric keyboard for text input
Is there a way to force the number keyboard to come up on the phone for an <input type="text"> ? I just realized that <input type="number"> in HTML5 is for “floating-point numbers”, so it isn’t suitable for credit card numbers, ZIP codes, etc.
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How to save username and password with Mercurial?
...rcurial in a personal project, and I have been typing my username and password every time I want to push something to the server.
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Cartesian product of multiple arrays in JavaScript
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2020 Update: 1-line (!) answer with vanilla JS
Original 2017 Answer: 2-line answer with vanilla JS:
(see updates below)
All of the answers here are overly complicated, most of them take 20 lines of code or even more.
This example uses just two lines of vanilla JavaScript,...
CSS: 100% font size - 100% of what?
.... I understand this is 'the same size in all browsers'. I also read this, for instance:
9 Answers
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Does Typescript support the ?. operator? (And, what's it called?)
Does Typescript currently (or are there plans to) support the safe navigation operator of ?.
14 Answers
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What is the meaning of the term “thread-safe”?
... it mean that two threads can't change the underlying data simultaneously? Or does it mean that the given code segment will run with predictable results when multiple threads are executing that code segment?
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Type List vs type ArrayList in Java [duplicate]
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Almost always List is preferred over ArrayList because, for instance, List can be translated into a LinkedList without affecting the rest of the codebase.
If one used ArrayList instead of List, it's hard to change the ArrayList implementation into a LinkedList one because ArrayLis...
Java 8 Iterable.forEach() vs foreach loop
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The better practice is to use for-each. Besides violating the Keep It Simple, Stupid principle, the new-fangled forEach() has at least the following deficiencies:
Can't use non-final variables. So, code like the following can't be turned into a forEach la...