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Search and replace in bash using regular expressions
...AR" | perl -pe 's/[a-zA-Z]/X/g and s/[0-9]/N/g'
This may allow you to do more creative matches... For example, in the snip above, the numeric replacement would not be used unless there was a match on the first expression (due to lazy and evaluation). And of course, you have the full language sup...
What's the yield keyword in JavaScript?
...ink everyone can read that on MDN. Visit davidwalsh.name/promises to learn more about them.
– Ejaz Karim
Jul 22 '17 at 11:02
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Can enums be subclassed to add new elements?
I want to take an existing enum and add more elements to it as follows:
15 Answers
15
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Why can't yield return appear inside a try block with a catch?
...classes
In each of these cases it would be possible to gain a little bit more freedom, at the cost of extra complexity in the compiler. The team made the pragmatic choice, for which I applaud them - I'd rather have a slightly more restrictive language with a 99.9% accurate compiler (yes, there are...
Is there an advantage to use a Synchronized Method instead of a Synchronized Block?
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@corsiKa: you save more than one instruction. A synchronized block is implemented using two instructions, monitorenter and monitorexit, plus an exception handler which ensures that monitorexit is called even in the exceptional case. That’s al...
How do I debug error ECONNRESET in Node.js?
...ptly closed its end of the connection. This is most probably due to one or more application protocol errors. You could look at the API server logs to see if it complains about something.
But since you are also looking for a way to check the error and potentially debug the problem, you should take a...
What is the use of “assert” in Python?
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@alpha_989 a) it's shorter and more readable, b) you can disable assert statements when running the interpreter (not so with the manual if). Read the docs for more info :)
– slezica
Jan 17 '18 at 15:07
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SELECT INTO a table variable in T-SQL
...e a target table! So what you want is
The INSERT statement adds one or more new rows to a table
You can specify the data values in the
following ways:
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By using a SELECT subquery to specify
the data values for one or more rows,
such as:
INSERT INTO MyTable
(PriKey,...
Namespace + functions versus static methods on a class
...ve a lower encapsulation value than namespaces. And isolating data is even more important in threaded execution.
– paercebal
Feb 17 '12 at 17:41
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Sorting an array of objects in Ruby by object attribute?
...y {|obj| obj.attribute}
Especially if attribute may be calculated.
Or a more concise approach:
objects.sort_by(&:attribute)
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