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Test if remote TCP port is open from a shell script

...ard with alpine linux and ubuntu both. probably others. no need to install extra when you're remoted in and can't. thanks for this! I might add, nc host port -w 2 && echo it works – std''OrgnlDave Apr 10 '17 at 14:34 ...
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How to use Swift @autoclosure

...his is Swift 3): func print(_ item: @autoclosure () -> Any, separator: String = " ", terminator: String = "\n") { #if DEBUG Swift.print(item(), separator:separator, terminator: terminator) #endif } When you say print(myExpensiveFunction()), my print override overshadows Swift's pri...
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How to decode HTML entities using jQuery?

How do I use jQuery to decode HTML entities in a string? 19 Answers 19 ...
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How do I load an HTML page in a using JavaScript?

...then feeds it to the innerHTML of your container element. /** * @param {String} url - address for the HTML to fetch * @return {String} the resulting HTML string fragment */ async function fetchHtmlAsText(url) { return await (await fetch(url)).text(); } // this is your `load_home() functi...
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What does “hashable” mean in Python?

...unhashable List of immutable types: int, float, decimal, complex, bool, string, tuple, range, frozenset, bytes List of mutable types: list, dict, set, bytearray, user-defined classes share | ...
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Why are C character literals ints instead of chars?

...nerating code to get an 'A' into the register may prefer to waste a little extra memory and encode the value as 0 'A' or 'A' 0 - depending on endianness, and also ensuring it is aligned properly (i.e. not at an odd memory address). My guess is that C's simply carried this level of CPU-centric behav...
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Mockito: InvalidUseOfMatchersException

...exception went away. E.g. inside below Java class, public class Foo { String getName(String id) { return mMap.get(id); } } the method String getName(String id) has to be AT LEAST protected level so that the mocking mechanism (sub-classing) can work. ...
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Class with single method — best approach?

...ery cheap operation in most languages, so speed is not an issue. Adding an extra line of code to the consumer is a low cost for laying the foundation of a much more maintainable solution in the future. And finally, if you want to avoid creating instances, simply create a singleton wrapper of your cl...
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How set maximum date in datepicker dialog in android?

...calendar.set(Calendar.DAY_OF_MONTH, day_of_month); String myFormat = "dd/MM/yyyy"; SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.getDefault()); your_edittext.setText(sdf.format(calendar.getTime())); ...
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Is object empty? [duplicate]

...ash each have a convenient isEmpty() function, if you don't mind adding an extra library. _.isEmpty({}); share | improve this answer | follow | ...