Filter: Difference between revisions
no edit summary
(Add emacs lisp) |
No edit summary |
||
Line 2,989:
=={{header|Q}}==
<syntaxhighlight lang="q">x where 0=x mod 2</syntaxhighlight>
=={{header|QBASIC}}==
{{works with|QuickBasic|4.x}}
{{works with|Visual Basic for DOS|1.0}}
{{works with|PDS|7.x}}
<syntaxhighlight lang="qbasic">
' OPTION EXPLICIT
' Filter
' This program selects certain elements from an array into a new array in a generic way
' SUBs
DECLARE SUB getNewArray (iGetWhat AS INTEGER)
' Var
' $DYNAMIC
CONST Even = 2
CONST Uneven = 1
DIM t AS INTEGER
DIM i AS INTEGER
DIM iArray%(1 TO 1)
DIM iArray2%(1 TO 1)
' Register
TYPE regSub
aNum AS INTEGER
END TYPE
' Main program cycle
CLS
RANDOMIZE TIMER
t = INT(RND * 300) + 1
REDIM iArray%(1 TO t)
PRINT "Select items in an array into a new array in a generic way."
PRINT "Base array:"
FOR i = 1 TO t
iArray%(i) = INT(RND * 2000) + 1
PRINT iArray%(i);
NEXT i
PRINT
' Gets the new array of evens
getNewArray Even
' Shows the result
t = UBOUND(iArray2%)
IF t > 0 THEN
PRINT "Selected items from the array (total:"; t; "of"; UBOUND(iArray%); "):"
FOR i = 1 TO t
PRINT iArray2%(i);
NEXT i
END IF
PRINT
PRINT "End of program."
END
REM $STATIC
SUB getNewArray (iGetWhat AS INTEGER)
' Var
DIM f AS INTEGER
DIM t AS INTEGER
DIM i AS INTEGER
DIM aFlag AS INTEGER
DIM rSub AS regSub
SHARED iArray%()
SHARED iArray2%()
CONST aName$ = "DUMMY$$$.$$$"
CONST False = 0, True = NOT False
f = FREEFILE
OPEN aName$ FOR OUTPUT AS #f
CLOSE
OPEN aName$ FOR RANDOM AS #f LEN = LEN(rSub)
t = UBOUND(iArray%)
aFlag = False
FOR i = 1 TO t
IF (iArray%(i) MOD 2) = 0 AND iGetWhat = Even THEN
aFlag = True
ELSEIF (iArray%(i) MOD 2) <> 0 AND iGetWhat = Uneven THEN
aFlag = True
END IF
IF aFlag THEN
rSub.aNum = iArray%(i)
PUT #f, , rSub
aFlag = False
END IF
NEXT i
' Redims the 2nd array
t = LOF(f) / LEN(rSub)
REDIM iArray2%(1 TO t)
FOR i = 1 TO t
GET #f, i, rSub
iArray2%(i) = rSub.aNum
NEXT i
CLOSE #f
KILL aName$
END SUB
</syntaxhighlight>
{{out}}
The output can change as the size of the base array and its values varies on each run.
<pre>
Select items in an array into a new array in a generic way.
Base array:
1426 770 1686 1472 385 1212 909 656 776 707 918 1646 1258 1406 887 42
Selected items from the array (total: 12 of 16 ):
1426 770 1686 1472 1212 656 776 918 1646 1258 1406 42
End of program.
</pre>
=={{header|R}}==
| |||