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What is the rationale behind having companion objects in Scala?
...f") // gives you the RealThing wrapped over string
val vi = AbstractClass(123) // gives you AlternativeThing wrapped over int
I wouldn't call the object/base class AbstractXxxxx because it doesn't looks bad: like creating something abstract. Give those names a real meaning.
Consider using immuta...
Is there a label/goto in Python?
...
123
No, Python does not support labels and goto, if that is what you're after. It's a (highly) str...
Asterisk in function call
...es a list as input, and expands it into actual positional arguments in the function call.
So if uniqueCrossTabs was [ [ 1, 2 ], [ 3, 4 ] ], then itertools.chain(*uniqueCrossTabs) is the same as saying itertools.chain([ 1, 2 ], [ 3, 4 ])
This is obviously different from passing in just uniqueCrossT...
What is the difference between D3 and jQuery?
...[50, 100, 150]);
// update existing nodes
binding
.style('width', function(d) { return d + 'px'; });
// create nodes for new data
binding.enter()
.append('div')
.style('width', function(d) { return d + 'px'; });
// remove nodes for discarded data
binding.exit()
.remove...
Is it possible to change the textcolor on an Android SearchView?
...
123
Add
<item name="android:editTextColor">@android:color/white</item>
to the pare...
How do I find all files containing specific text on Linux?
...ion, because accepted do not search half words
– waza123
Aug 27 '19 at 8:53
add a comment
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“unpacking” a tuple to call a matching function pointer
...ng number of values, which will later be used as arguments for a call to a function pointer which matches the stored types.
...
One line ftp server in python
... No resume, single connection, etc.
– bugmenot123
Sep 15 '16 at 9:36
@RomanPlášil it will, just run server on...
Get all child views inside LinearLayout at once
...
Get all views of a view plus its children recursively in Kotlin:
private fun View.getAllViews(): List<View> {
if (this !is ViewGroup || childCount == 0) return listOf(this)
return children
.toList()
.flatMap { it.getAllViews() }
.plus(this as View...
Adding a column to a data.frame
...onsecutive number len times
get.seq <- mapply(from, to, 1:length(from), FUN = function(x, y, z) {
len <- length(seq(from = x[1], to = y[1]))
return(rep(z, times = len))
})
# when we unlist, we get a vector
your.df$group <- unlist(get.seq)
# and append it to...