case-statement

Why does this fail to compile: trait Item trait StringItem extends Item { def makeString: String } trait SomeOtherItem extends Item trait DummyTrait case class Marquee(items: Seq[Item]) extends { val strings: Seq[String] = items.collect { case si: StringItem => si.makeString // <-- partial function inside braces } } with DummyTrait with the error message <$anon: Item => String> requires premature access to class Marquee ? It seems to me that the partial function makes no use of Marquee . Yet this compiles: val pf: PartialFunction[Item, String] = { case si: StringItem => si.makeString } case

Is it okay to combine cases that share assignments and repeat the case for assignments that are not shared, or is it preferred to just keep each separated? To illustrate with a simple example.. case 0 and 180 both include w = 330 so they have been combined; the value assigned to x is different for each so they are repeated to do the x assignment. switch(window.orientation) { case 0: case 180: w = 330; //break case 0: x = '-180px'; //break case -90: case 90: w = 480; x = '0'; break; case 180: x = '-80px'; break; } When it comes to do more than one operation per element in a switch statement, it

The man page says that case statements use "filename expansion pattern matching". I usually want to have short names for some parameters, so I go: case $1 in req|reqs|requirements) TASK="Functional Requirements";; met|meet|meetings) TASK="Meetings with the client";; esac logTimeSpentIn "$TASK" I tried patterns like req* or me{e,}t which I understand would expand correctly to match those values in the context of filename expansion, but it doesn't work. Brace expansion doesn't work, but * , ? and [] do. If you set shopt -s extglob then you can also use extended pattern matching : ?() - zero or

If I compare a string literal to a string literal using the case statement, I get the expected behavior: if they are the same - it matches, if they are not - it does not. However, if I compare a string literal to a constant that is a string, I get "Pattern matches are overlapped" warning and the branch with the constant always matches. Here's an example session: Prelude> let var1 = "abc" Prelude> let var2 = "def" Prelude> case var1 of { var2 -> "Fail"; _ -> "Win" } <interactive>:1:0: Warning: Pattern match(es) are overlapped In a case alternative: _ -> ... "Fail" Prelude> case "abc" of { var2

Found a couple of similar questions here on this, but couldn't figure out how to apply to my scenario. My function has a parameter called @IncludeBelow . Values are 0 or 1 (BIT). I have this query: SELECT p.* FROM Locations l INNER JOIN Posts p on l.LocationId = p.LocationId WHERE l.Condition1 = @Value1 AND l.SomeOtherCondition = @SomeOtherValue If @IncludeBelow is 0, i need the query to be this: SELECT p.* FROM Locations l INNER JOIN Posts p on l.LocationId = p.LocationId WHERE l.Condition1 = @Value1 AND l.SomeOtherCondition = @SomeOtherValue AND p.LocationType = @LocationType -- additional

I want to create a 64-bit barrel shifter in verilog (rotate right for now). I want to know if there is a way to do it without writing a 65 part case statement? Is there a way to write some simple code such as: Y = {S[i - 1:0], S[63:i]}; I tried the code above in Xilinx and get an error: i is not a constant. Main Question: Is there a way to do this without a huge case statment? I've simplified some of the rules for clarity, but here are the details. In the statement Y = {S[i - 1:0], S[63:i]}; you have a concatenation of two signals, each with a constant part select. A constant part select is of

I'm using a Derived Column Task to change column data using a CASE WHEN statement. However, I need to be able to say.. SQL CODE WOULD BE: CASE WHEN Column01 LIKE '%i%' THEN '0' ELSE '1' END In SSIS Expression Language that would be: [Column01] == "i" ? "0" : "1" (that's for equals i, not, LIKE %i%. Is it possible to use a LIKE operator? I believe you'll want to use the FINDSTRING function . FINDSTRING(character_expression, searchstring, occurrence) ... FINDSTRING returns null if either character_expression or searchstring are null. Guilherme de Jesus Santos I know it is an old question, but