XQuery Coding Guidelines: Rule 4

4a-one-line-if-then-else.xqy

(: one line if/then/else :)
if ($condition) then $action else ()

4b-multiple-line-if-then-else.xqy

(: multiple line if/then/else :)
if ($condition)
then xdmp:log("If we kept this on one line, it would be unreadable")
else xdmp:log("This is a very long action, don't want it to scroll")

4c-chained-if-then-else.xqy

(: chained if/then/else :)
if ($condition)
then xdmp:log("If we kept this on one line, it would be unreadable")
else

    if ($condition2)
    then xdmp:log("This is a very long action, don't want it to scroll")
    else
        for $i in (1,2,3)
        return concat("line ",$i)

4d-flwor-1.xqy

(: flwor :)
let $a := "alpha"
for $i in (1 to 50)
where $i mod 2 eq 1
return concat($a,$i)

4e-flwor-2.xqy

(: flwor :)
let $a := "alpha"
for $i in (1 to 50)
let $x := $i mod 2
where $x eq 1
return concat($a,$i)

4f-flwor-with-subordinate-flwor.xqy

(: flowr with subordinate flwor :)
let $a := "alpha"
let $x :=
    for $i in (1 to 50)
    where $i mod 2 eq 1
    return concat($a,$i)
return $x