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How do I do redo (i.e. “undo undo”) in Vim?
...ers multiple paths through the undo history. This is useful if you accidentally type something after undoing too much.
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Can I access variables from another file?
Is it possible to use a variable in a file called first.js inside another file called second.js ?
9 Answers
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What are the differences between Rust's `String` and `str`?
...tr most commonly2 appears as &str: a reference to some UTF-8 data, normally called a "string slice" or just a "slice". A slice is just a view onto some data, and that data can be anywhere, e.g.
In static storage: a string literal "foo" is a &'static str. The data is hardcoded into the execu...
how to remove css property using javascript?
...e provided. I tried using el.style.removeProperty('zoom'); (or 'fill', actually, in my case) that seems to do the same thing in IE, and get ignored by the other browsers. For some reason I was surprised to find that setting it to a blank string has the same effect and seems to work on all (recent ve...
How to sort a dataframe by multiple column(s)
...as speedy as the base R commands with their convoluted machinations. Typically brilliant Hadley Wickham work. My only gripe with it is that it breaks the standard R nomenclature where sorting objects get called by sort(object), but I understand why Hadley did it that way due to issues discussed in...
Swift performSelector:withObject:afterDelay: is unavailable [duplicate]
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Swift is statically typed so the performSelector: methods are to fall by the wayside.
Instead, use GCD to dispatch a suitable block to the relevant queue — in this case it'll presumably be the main queue since it looks like you're doing ...
Using an ORM or plain SQL? [closed]
...d ORMs in python like SQLAlchemy , I didn't stick with them for long. Usually it was either the documentation or complexity (from my point of view) holding me back.
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Show diff between commits
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Try
git diff k73ud^..dj374
to make sure to include all changes of k73ud in the resulting diff.
git diff compares two endpoints (instead of a commit range).
Since the OP want to see the changes introduced by k73ud, he/she needs to difference between the first parent commit of...
Count occurrences of a char in a string using Bash
...
you can for example remove all other chars and count the whats remains, like:
var="text,text,text,text"
res="${var//[^,]}"
echo "$res"
echo "${#res}"
will print
,,,
3
or
tr -dc ',' <<<"$var" | awk '{ print length; }'
or
tr -dc ',' &l...
Why does base64 encoding require padding if the input length is not divisible by 3?
... the protocol used padding, there would be no need to transmit a length at all. The data could be encoded as it came in from the camera, each chunk terminated with padding, and the receiver would be able to decode the stream correctly.
Obviously that's a very contrived example, but perhaps it illus...