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What does [].forEach.call() do in JavaScript?
...reating a quick way to call the forEach function, and you're changing this from the empty array to a list of all <a> tags, and for each <a> in-order, you are calling the function provided.
EDIT
Logical Conclusion / Cleanup
Below, there's a link to an article suggesting that we scrap a...
`levels
...uates your expression within that environment. Assigning the return object from the call to within() thus succeeds in the properly modified data frame.
Here is an example (you don't need to create new datX - I just do that so the intermediary steps remain at the end)
## one or t'other
#dat2 <- ...
Get the time difference between two datetimes
... milliseconds to the moment(), it calculates the date that is milliseconds from(after) epoch/unix time that is January 1, 1970 (midnight UTC/GMT).
That is why you get 1969 as the year together with wrong hour.
duration.get("hours") +":"+ duration.get("minutes") +":"+ duration.get("seconds")
So, I...
Why doesn't C++ have a garbage collector?
...eople not being able to come to a general consensus fast enough.
A quote from Bjarne Stroustrup himself:
I had hoped that a garbage collector
which could be optionally enabled
would be part of C++0x, but there were
enough technical problems that I have
to make do with just a detailed
...
System.currentTimeMillis vs System.nanoTime
...() gives you a nanosecond-precise time, relative to some arbitrary point.
From the Java Documentation:
public static long nanoTime()
Returns the current value of the most precise available system timer, in nanoseconds.
This method can only be used to
measure elapsed time and is not
...
Check if a value is an object in JavaScript
...er all there's no recipe at all!) for checking whether it's an object, far from it. Since people tend to look for something to copy from here without doing any research, I'd highly recommend that they turn to the other, most upvoted (and correct!) answer.
...
Check if current directory is a Git repository
...
Copied from the bash completion file, the following is a naive way to do it
# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
# Conceptually based on gitcompletion (http://gitweb.hawaga.org.uk/).
# Distributed u...
sed in-place flag that works both on Mac (BSD) and Linux
...
the --with-default-names was removed from homebrew-core, more info in this answer. when installing gnu-sed now, the installation instructions specify that you need to add gnubin to your PATH: PATH="/usr/local/opt/gnu-sed/libexec/gnubin:$PATH"
...
Include jQuery in the JavaScript Console
...
Copy everything from:
https://code.jquery.com/jquery-3.4.1.min.js
And paste it into console. Works perfectly.
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Python's equivalent of && (logical-and) in an if-statement
...
@Matt the table goes from lowest precedence to highest. It's easier to remember the precedence if you've studied boolean algebra; "or" is addition and "and" is multiplication.
– Michael Stroud
Dec 5 '17 at 1...