Questions tagged [function-literal]
38 questions
1
vote
1 answer
Knockout - keyCode property not being passed through wrapped function
I've set up my Knockout bindings to have a keypress event because I wish to detect Enter on an input field.
If I have the following:
data-bind="event: { keypress: KeyPress }"
and my view-model has
this.KeyPress = function(data, event) {
…
awj
- 7,482
- 10
- 66
- 120
0
votes
1 answer
How does the underscore placeholder in (println _) represent an entire parameter list of its original function literal?
I tried to make an example to explain that the placeholder _ without parentheses can represent (be expanded to) any number of parameters with any type, not just can represent "only one" parameter with any type. However, the one I made was incorrect…
Julia Chang
- 181
- 1
- 8
0
votes
1 answer
Variable definition in Scala function literal
I'm wondering the result of the piece of code
object localTest {
def hello = {
var t = 3
() => {
t = t + 3
println(t)
}
}
}
object mainObj {
def main(args: Array[String]): Unit = {
val test = localTest.hello
…
Jason_typ
- 3
- 1
0
votes
1 answer
Function as argument, access inner parameter
The package valyala/fasthttp implements the following function type:
type RequestHandler func(ctx *RequestCtx)
It is used in buaazp/fasthttprouter like this:
func (r *Router) Handle(method, path string, handle fasthttp.RequestHandler) {
…
Arnaud H
- 881
- 2
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- 16
0
votes
1 answer
scala function literal confusion
I have made a unit test to study Scala function literal format and found it quite confusing, could you please help me understand meaning of different syntax?
@Test def supplierLiteral: Unit = {
object Taker {
def…
Chen Fan
- 1
- 2
0
votes
1 answer
Receiving "missing parameter type" when using underscore for input parameter on function literal
I have a trait with generic parameters which contains a method where I am attempting to define the default implementation as "empty".
trait MetaBase[T <: Throwable] {
...
def riskWithEvent[V](
vToEvaluate: => V,
failureTEvent:…
chaotic3quilibrium
- 5,661
- 8
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- 86
0
votes
1 answer
Why is this function seen as a delegate?
In an attempt to wrap a C function taking callbacks, I encountered the problem of member functions being seen as delegates. The C function wouldn't take delegates, so I settled on something else instead:
extern(C) void onMouse(void delegate(int,…
hpm
- 1,202
- 13
- 34
0
votes
1 answer
AspectJ can't work on Scala function literal?
I have the following scala class and annotated aspectj class:
package playasjectj
import org.aspectj.lang.annotation.Pointcut
import org.aspectj.lang.annotation.Aspect
import org.aspectj.lang.annotation.Before
class Entity {
def…
Grant
- 500
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