條件語句

if true then
    -- do something
end if 

if false then
    -- do something
end if 

例:

set a to 20
set b to 30

if a = b then
    set c to 10
else
    set c to 20
end if

0ACA655C-E5B7-47B8-B354-5D509CB6FDA4.png

如何判斷是否為“真”（true）

數(shù)的比較運算符

= is (or, is equal to) 等于
> is greater than 大于
< is greater than 小于
>= is greater than or equal to 大于等于
<= is less than or equal to 小于等于

并支持反義符號，如不大于，is not greater than。不等于 /= 或 is not

字符串的比較運算符

begins with (or, starts with)  以……開頭
ends with                    以……結(jié)尾
is equal to                  一致
comes before                 在……之前
comes after                  在……之前
is in                       在……之中
contains                     包含

反義運算符

does not start with 不以……開頭
does not contain    不以……結(jié)尾
is not in          不在……之內(nèi)
等等。

比較運算符 "comes before" 和 "comes after" 對字符串逐字母比較，區(qū)分大小寫

if "Jack" comes after "Rose" then
    set a to 123
else
    set a to 456
end if

25BB544A-B9F9-4A72-883C-A32CCD8EE95B.png

忽略空格

set stringA to "Ja c k"
set stringB to "Jack"
ignoring white space
    if stringA = stringB then beep
end ignoring

列表的比較運算符

begins with 以……開頭
ends with   以……結(jié)尾
is equal to 一致
is in       在……之中
contains    包含

例子

set listA to {"a", "b", "c"}
if "a" is in listA then
    set c to 123
else
    set c to 456
end if

3762713E-DE96-4DBF-8CBC-47A229660B11.png

記錄的比較運算符

is equal to(也可以使用 =)    一致
contains                  包含

set recordA to {name:"Jack", age:20}
-- name of recordA is "Jack"
if recordA contains {name:"Jack"} then
    set c to 123
end if

3B4530DD-9373-4716-854A-48893B344678.png

布爾數(shù)據(jù)的 與、或、非

and

set x to true
set y to true
set z to (x and y)

48C6CD84-163D-47BC-8C3B-047191B94E94.png

or

set x to true
set y to false
set z to (x or y)

C160CC9A-BA90-44DC-BE26-BBEE12083375.png

not

set x to not true
set y to false
if x = y then
    set z to 123
end if

DC3E75D4-9DAE-448D-A239-C8D56A217967.png

循環(huán)

repeat 重復(fù) 重復(fù)次數(shù)必須是整數(shù)，例

set repetitions to 2
-- repeat 2 times
repeat repetitions times
    say "Hello world!"
end repeat

滿足條件后重復(fù)執(zhí)行下一步

set isRun to false
-- until 與 while 判斷結(jié)果相反
repeat while isRun is false
    say isRun
end repeat

從1讀到5，步長默認為1

repeat with i from 1 to 5
    say i
end repeat

by 2 設(shè)置步長為2，如下

repeat with i from 1 to 5 by 2
    say i
end repeat

repeat with aItem in itemList

end repeat

跳出循環(huán), exit repeat 相當(dāng)于break