----> &null
s := "abcd" ----> "abcd"
s := "x" ----> "x"
s ||:= "x" ----> "xx"
s ----> "xx"
s := "x" ----> "x"
s ||:= "xx" ----> "xxx"
s ----> "xxx"
s := "x" ----> "x"
s ||:= "X" ----> "xX"
s ----> "xX"
s := "x" ----> "x"
s ||:= "abc" ----> "xabc"
s ----> "xabc"
s := "x" ----> "x"
s ==:= "x" ----> "x"
s ----> "x"
s := "x" ----> "x"
s ==:= "xx" ----> none
s ----> "x"
s := "x" ----> "x"
s ==:= "X" ----> none
s ----> "x"
s := "x" ----> "x"
s ==:= "abc" ----> none
s ----> "x"
{s[1:2] := "xx";s} ----> "xx"
{s[-1:0] := "";s} ----> "x"
{s[1] := "abc";s} ----> "abc"
{s[1+:2] := "y";s} ----> "yc"
{s[2] :=: s[3];s} ----> "yc"
s[6] := "t" ----> none
s[0-:6] := "u" ----> none
{s[1:0] :=: s[0:1];s} ----> "yc"
"x" << "x" ----> none
"x" << "X" ----> none
"X" << "x" ----> "x"
"xx" <<= "xx" ----> "xx"
"xxx" <<= "xx" ----> none
"xx" <<= "xxx" ----> "xxx"
"x" >>= "x" ----> "x"
"x" >>= "xx" ----> none
"xx" >>= "x" ----> "x"
"x" >> "x" ----> none
"x" >> "X" ----> "X"
"X" >> "x" ----> none
"x" == "x" ----> "x"
"x" == "X" ----> none
"X" == "x" ----> none
"x" ~== "x" ----> none
"x" ~== "X" ----> "X"
"X" ~== "x" ----> "x"
2
22
222
2222
22222
222222
2222222
22222222
222222222
every i := 1 to 9 do write(integer(repl("2",i))) ----> none
3
23
223
2223
22223
222223
2222223
22222223
222222223
every i := 1 to 9 do write(repl("2",i) + 1) ----> none
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
every i := 1 to 30 do write(integer(repl("0",i) || "2")) ----> none
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
every i := 1 to 30 do write((repl("0",i) || "2") + 1) ----> none
c1 := 'abcde' ----> 'abcde'
c2 := 'aeuoi' ----> 'aeiou'
c1 ++ c2 ----> 'abcdeiou'
c1 -- c2 ----> 'bcd'
c1 ** c2 ----> 'ae'
2 ~=== +2 ----> none
3 ~=== *"abc" ----> none
'abc' ~=== ('abc' ++ '') ----> none
any('aeiou',&lcase) ----> 2
any('aeiou',&ucase) ----> none
2
2
2
2
2
2
2
2
2
2
2
6
6
6
6
6
6
6
6
6
6
6
every write(any('aeiou',&lcase,1 to 5,10 to 20)) ----> none
match("abc","abcabcabcabc") ----> 4
match("abc","xabcabcabcabc") ----> none
5
5
5
5
5
5
5
8
8
8
5
5
5
8
5
8
5
8
every write(match("abc","xabcabcabcabc",1 to 10,1 to 10)) ----> none
upto('56d&',&lcase) ----> 4
upto('56d&',&ucase) ----> none
upto('56d&',&lcase,15) ----> none
many(&lcase,"this is a Test") ----> 5
many(&lcase,"this is a Test",5) ----> none
many(&lcase,"this is a Test",5,9) ----> none
find("aa","xxaaaaaa") ----> 3
3
4
5
6
7
every write(find("aa","xxaaaaaa")) ----> none
4
5
every write(find("aa","xxaaaaaa",4,7)) ----> none
bal('-','(',')',"-35") ----> 1
bal('+','(',')',"((2*x)+3)+(5*y)") ----> 10
10
7
7
10
every write(bal('+','(',')',"((2*x)+3)+(5*y)",1 to 10)) ----> none
bal('+','[','[',"[[2*x[+3[+[5*y[") ----> none
bal('+','([','])',"([2*x)+3]+(5*y]") ----> 10
bal(,,,"()+()") ----> 1
bal(&cset,,,"()+()") ----> 1