DIESEL： substr右起4个字符

    DIESEL String Functions
    -----------------------
 
    $(+,,,...)
        The  sum  of  the  numbers , , ... is returned.
Example:
(menucmd "m=$(+,1,2)")
"3"
 
(menucmd "m=$(+,2,1)")
"3"
 
(menucmd "m=$(+,1,2,1)")
"4"
 
(menucmd "m=$(+,1,2,3)")
"6"
 
(menucmd "m=$(+,1,2,3,4,5,6)")
"21"
 
; (menucmd "m=EXPRESSION")used to give the result in VLIDE
; in FIELDS we us EXPRESSION ONLY
 
 
; The result can used as variable but be note that the variable type is string
(setq a (menucmd "m=$(+,1,1)"))
(type a)
STR
 
; Be note that we can not use variables
; If needed we have to add the expression itself
(menucmd "m=$(+,pls02,1)")
" $(+,??) "
 
(menucmd "m=$(+,$(+,1,2),1)")
"4"
 
    $(-,,,...)
        The  result  of subtracting the numbers  through  from
         is returned.
Example:
(menucmd "m=$(-,1,2)")
"-1"
 
(menucmd "m=$(-,2,1)")
"1"
 
(menucmd "m=$(-,1,2,3,4,5,6)")
"-19"
 
(menucmd "m=$(-,6,3)")
"3"
 
(menucmd "m=$(-,6,5,4,3,2,1)")
"-9"
 
     $(*,,,...)
        The result of multiplying the numbers  ,,...  is
        returned.
Example:
(menucmd "m=$(*,1,2)")
"2"
 
(menucmd "m=$(*,2,1)")
"2"
 
(menucmd "m=$(*,1,2,3,4,5,6)")
"720"
 
(menucmd "m=$(*,6,5,4,3,2,1)")
"720"
 
 
 
    $(/,,,...)
        The  result of dividing the number  by ,...   is
        returned.
Example:
(menucmd "m=$(/,1,2)")
"0.5"
 
(menucmd "m=$(/,1,2,3)")
"0.16666667"
 
(menucmd "m=$(/,0.5,3)")
"0.16666667"
 
(menucmd "m=$(/,0.5,1,2)")
"0.25"
 
(menucmd "m=$(/,3,2,1)")
"1.5"
 
(menucmd "m=$(/,2,1)")
"2"
 
(menucmd "m=$(/,1,2,3,4,5,6)")
"0.00138889"
 
(menucmd "m=$(/,6,5,4,3,2,1)")
"0.5"