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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 ...
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...
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
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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...
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...
How to set gradle home while importing existing project in Android studio
... plugin (which contains a bundled version of gradle) should be already installed in where/you/installed/android-studio/plugins/gradle so you shouldn't need to manually download it. Depending on the version of Android Studio, that last directory may be where/you/installed/android-studio/gradle/gradl...
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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How do I get the dialer to open with phone number displayed?
I don't need to call the phone number, I just need the dialer to open with the phone number already displayed. What Intent should I use to achieve this?
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how to get the host url using javascript from the current page
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@MattBrowne When working with something that shall produce a string I'd say you should always use concat. In example var a = 1 + 2 + " should be 12"; vs the concat version of this var a = "".concat(1).concat(2).concat(" should be 12");. Using concat will save you a lot of...
Converting Stream to String and back…what are we missing?
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@Mortennobel ToArray() allocates a new array in memory and copies data over from the buffer, which may have serious implications if you're dealing with a lot of data.
– Levi Botelho
Apr 28 '19 at 21:01
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