@echo off title Test echo Select a language. (de/en) set /p language= IF /i “%language%”==”de” goto languageDE IF /i “%language%”==”en” goto languageEN echo Not found. goto commonexit :languageDE echo German goto commonexit :languageEN echo English goto commonexit :commonexit pause The point is that batch simply continues through instructions, line by line until it reaches a … Read more
It’s elsif, not elseif. Slightly confusing when you’re new, probably.
In old-fashioned Prolog code, the following pattern arises rather frequently: predicate([], …). predicate([L|Ls], …) :- condition(L), then(Ls, …). predicate([L|Ls], …) :- \+ condition(L), else(Ls, …). I am using lists here as an example where this occurs (see for example include/3, exclude/3 etc.), although the pattern of course also occurs elsewhere. The tragic is the following: … Read more
You could simply use the in keyword. Like this : if number_you_are_looking_for in list: # your code here For instance : myList = [1,2,3,4,5] if 3 in myList: print(“3 is present”)
Using continue passes for the next iteration of the for loop Using pass just does nothing So when using continue the print won’t happen (because the code continued to next iteration) And when using pass it will just end the if peacefully (doing nothing actually) and do the print as well
IF and other PL/pgSQL features are only available inside PL/pgSQL functions. You need to wrap your code in a function if you want to use IF. If you’re using 9.0+ then you can do use DO to write an inline function: do $$ begin — code goes here end $$ If you’re using an earlier … Read more
Simple: IF EXISTS(SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ‘X’ AND COLUMN_NAME = ‘Y’) AND EXISTS(SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ‘Z’ AND COLUMN_NAME = ‘A’) BEGIN UPDATE [dbo].[X] SET Y= (SELECT inst.[A] FROM [dbo].[Z] s WHERE s.[B] = [dbo].[x].[B]); END GO
It’s not a question of which is faster, rather one of correctness. An exception is for circumstances which are exactly that, exceptional. If it is possible for n to be null as part of normal business logic, then use an if..else, else throw an exception.
ANY should actually be the right choice if ( ANY( lastNeighArray==”n” ) ) then there is also ALL if you wanted the whole array to contain that value.