I have this if statement and when I run it it reeturns an error : " ')' expected "
if (a=1 and b=4 and c=width/2) or (a=2 and b=1 and c=width/2) then
...
end
Am I doing something wrong here? or is it something wrong with lua?
Try to replace your current code with this:
if (a==1 and b==4 and c==width/2) or (a==2 and b==1 and c==width/2) then
...
end
= means assignment, whereas == checks for equality and it looks like you want to check for equality.
Related
a = raw_input("What do you want to add to the list?"
" If you would like to remove something from the list type 'remove' : ")
if str(a) not == "remove".lower():
print('"'), str(a), ('"' " has been added to list")
list1.append(a)
print(list1)
When i run this (there is more code but this is the relevant bit) it says "expected ':'" just before the not in the "if str(a) not == "remove".lower():" line. keep in mind that this is on python 2.7
To test for inequality in Python this is valid:
A != B
and so is this:
not (A == B)
but this is not:
A not == B # syntax error
(You could be forgiven for thinking that's how it works if you've been using the in operator, because not (A in B) and A not in B are equivalent.)
Once you have fixed that, know that this:
print('"'), str(a), ('"' " has been added to list")
is cursed, and only accidentally does what you want in Python 2 (it won't do what you evidently assume it does in any currently-supported Python version). When you want to print() something, the specification of what is to be printed ends at that first ). The following works in both Python 2 and Python 3:
print( '"{}" has been added to list'.format(a) )
Then there's the fact that you are applying .lower() to the wrong side of a comparison (to something that is already always lower-case).
I'm trying to determine if it's between the hours of 12 am and 1 am. Here is my if statement:
If InStr(Time,"12") AND InStr(Time,"AM") Then
' Do something
Else
' Do something else
End If
The problem is that this statement evaluates to false, even if both of the conditions are true. I know this because I have tried a nested if like this
If InStr(Time,"12") Then
If InStr(Time,"AM") Then
' Do something
...
And that works. This also works
If InStr(Time,"12")<>0 AND InStr(Time,"AM")<>0 Then
' Do something
...
But if it works as a nested if, why can't I test both of the nested if conditions in a single if statement?
I replaced the InStr function calls with the values that they return
If 1 AND 10 Then
' Do something
Else
' Do something else
End If
And the same thing happened: the if statement evaluated as false and the "Do something else" commands were executed instead. But when I nested the second condition as another if statement inside the first if statement, the "Do something" commands were executed.
Why is that and is there any way to do this without the <>0 and without nesting?
If Time() >= TimeValue("12:00:00") AND Time() <= TimeValue("23:59:59") then
'Do Something
ElseIf Time() >= TimeValue("00:00:00") AND Time() <= TimeValue("01:00:00") then
'Do the same
Else
'Do something different
End If
This should work :)
The problem you observed is caused by the fact that VBScript uses the same operators for boolean and bit operations, depending on the data type of the operands. The InStr function returns a numeric value unless one of the strings is Null, so the operation becomes a bitwise comparison instead of a boolean comparison, as JosefZ pointed out. The behavior is documented:
The And operator also performs a bitwise comparison of identically positioned bits in two numeric expressions and sets the corresponding bit in result [...]
Demonstration:
>>> WScript.Echo "" & (True And True)
True
>>> WScript.Echo "" & (6 And 1) '0b0110 && 0b0001 ⇒ 0b0000
0
>>> WScript.Echo "" & (6 And 2) '0b0110 && 0b0010 ⇒ 0b0010
2
To enforce a boolean comparison you need to use InStr(...) > 0 or CBool(InStr(...)) (both of which evaluate to a boolean result) instead of just InStr(...) (which evaluates to a numeric result).
Date and Time are stored as number of days, where midnight is 0.0, and 1 am is 1/24 :
If Time <= 1/24 Then ' or If Time <= #1am# Then
When you using Time() function and if result like that 10:12:12 AM in this way Instr will result Ture because Instr by default use vbbinarycompare looking For any 12in binary format in 10:12:12 AM and there is sec and min 12 so it will Return True .
just try this :
myHour=replace(Time,Right(Time,9),"") 'get only the hour from time
myAMPM=replace(Time,Time,Right(Time,2)) 'get only AM or PM from time
If InStr(1,myHour,12,1) > 0 AND InStr(1,myAMPM,"AM",1) > 0 Then
wscript.echo "True"
Else
wscript.echo "False"
End If
I don't know why this code doesn't work:
Dim a
a = InputBox("What time do you want?")
If InStr(a, "pm") Then
(Replace(a, "pm", ""))
a = a + 12
c = MsgBox(a, 0, Time)
WScript.Quit
Else
End If
b = MsgBox(a & form, 0, "L")
Whenever I try to start it, it responds with:
"Error: Expected Statement"
Is it because the Replace statement isn't right or because there's a mistake in the rest of the script?
When you try to run that code you should get the following error
Microsoft VBScript compilation error: Expected statement
Line 4
which will lead you to the culprit which is
(Replace(a, "pm",""))
which isn't a valid statement in VBScript hence the error.
Based on what you are trying to do the script needs to return the result of the Replace() function call, something like this
a = Replace(a, "pm","")
I would like to ask about the if else expression in ireport jasper report. May I know is it possible to have multiple or more parameter in the if else statement?
(($P{endDate}.isEmpty()==true || $P{endDate}.equals(""))? "" :
" createDate>='" + $P{startDate} +"'" && " createDate<='" + $P{endDate} +"'")
Based on the code above, there are not allowed me to use "&&". It prompt out syntax error.
Besides that, May I know any solution to solve it? Thank you very much.
I'm assuming it's a query expression your trying to write. You probably would have to do something as follows:
Create a parameter for your dataset. This parameter should not be "prompted" and lets call it DATE_LIMIT_EXPRESSION. You should then set its default value as your expression. For example (if I a get what you meant), this could be your default expression:
"1" +
(($P{startDate}.isEmpty() == false) ? (" AND createDate >= " + $P{startDate}) : "") +
(($P{stopDate}.isEmpty() == false) ? (" AND stopDate <= " + $P{stopDate}) : "")
Now, your dataset query should be something like:
select
...
where $P!{DATE_LIMIT_EXPRESSION}
Just notice the "$P!" syntax. You can find more information about this in the Jasper Reports' documentation.
The "single line if statement" exists in C# and VB.NET as in many other programming and script languages in the following format
lunchLocation = (dayOfTheWeek == "Tuesday") ? "Fuddruckers" : "Food Court";
does anyone know if there is even in VBScript and what's the extact syntax?
The conditional ternary operator doesn't exist out of the box, but it's pretty easy to create your own version in VBScript:
Function IIf(bClause, sTrue, sFalse)
If CBool(bClause) Then
IIf = sTrue
Else
IIf = sFalse
End If
End Function
You can then use this, as per your example:
lunchLocation = IIf(dayOfTheWeek = "Tuesday", "Fuddruckers", "Food Court")
The advantage of this over using a single line If/Then/Else is that it can be directly concatenated with other strings. Using If/Then/Else on a single line must be the only statement on that line.
There is no error checking on this, and the function expects a well formed expression that can be evaluated to a boolean passed in as the clause. For a more complicated and comprehensive answer see below. Hopefully this simple response neatly demonstrates the logic behind the answer though.
It's also worth noting that unlike a real ternary operator, both the sTrue and sFalse parameters will be evaluated regardless of the value of bClause. This is fine if you use it with strings as in the question, but be very careful if you pass in functions as the second and third parameters!
VBScript does not have any ternary operator.
A close solution in a single line and without using a user defined function, pure VBScript:
If dayOfTheWeek = "Tuesday" Then lunchLocation = "Fuddruckers" Else lunchLocation = "Food Court"
BTW, you can use JScript in Classic ASP if ternary opertor is so important to you.
edited 2017/01/28 to adapt to some of the non boolean condition arguments
Note: If all you need is to select an string based on an boolean value, please, use the code in the Polinominal's answer. It is simpler and faster than the code in this answer.
For a simple but more "flexible" solution, this code (the original code in this answer) should handle the usual basic scenarios
Function IIf( Expression, TruePart, FalsePart)
Dim bExpression
bExpression = False
On Error Resume Next
bExpression = CBool( Expression )
On Error Goto 0
If bExpression Then
If IsObject(TruePart) Then
Set IIf = TruePart
Else
IIf = TruePart
End If
Else
If IsObject(FalsePart) Then
Set IIf = FalsePart
Else
IIf = FalsePart
End If
End If
End Function
If uses the Cbool function to try to convert the passed Expression argument to a boolean, and accepts any type of value in the TrueValue and FalseValue arguments. For general usage this is fast, safe and fully complies to documented VBScript behaviour.
The only "problem" with this code is that the behaviour of the CBool is not fully "intuitive" for some data types, at least for those of us that constantly change between vbscript and javascript. While numeric values are coherent (a 0 is a False and any other numeric value is a True), non numeric types generate a runtime error (in previous code handled as false), except if it is a string with numeric content or that can be interpreted as true or false value in english or in the OS locale.
If you need it, a VBScript version "equivalent" to the ? javascript ternary operator is
Function IIf( Expression, TruePart, FalsePart )
Dim vType, bExpression
vType = VarType( Expression )
Select Case vType
Case vbBoolean : bExpression = Expression
Case vbString : bExpression = Len( Expression ) > 0
Case vbEmpty, vbNull, vbError : bExpression = False
Case vbObject : bExpression = Not (Expression Is Nothing)
Case vbDate, vbDataObject : bExpression = True
Case Else
If vType > 8192 Then
bExpression = True
Else
bExpression = False
On Error Resume Next
bExpression = CBool( Expression )
On Error Goto 0
End If
End Select
If bExpression Then
If IsObject( TruePart ) Then
Set IIf = TruePart
Else
IIf = TruePart
End If
Else
If IsObject( FalsePart ) Then
Set IIf = FalsePart
Else
IIf = FalsePart
End If
End If
End Function
BUT independently of the version used, be careful, you are calling a function, not using a ternary operator. Any code, or function call you put in TruePart of FalsePart WILL BE EXECUTED independently of the value of the condition. So this code
value = IIf( 2 > 3 , DoSomething(), DontDoSomething() )
WILL EXECUTE the two functions. Only the correct value will be returned to value var.
There's a weird trick possible (hi, Python!) for exact one-liner:
lunchLocation = array("Food Court", "Fuddruckers")(-(dayOfTheWeek = "Tuesday"))
The "magic" works because of a boolean operation specifics in VBScript.
True is actually -1 and False is 0, therefore we can use it as an index for array (just get rid of a minus). Then the first item of array will be a value for False condition and second item for True.
related to #MC_ND answer:
to execute only one function, you can do something like that:
If VarType(TruePart) = vbString and InStr(1,TruePart,"function:") = 1 then
IIf = GetRef(Mid(TruePart,10))()
Else
IIf = TruePart
End If
the same for the FalsePart, and call IIf() it like that:
value = IIf( 2 > 3 , "function:DoSomething", "function:DontDoSomething" )
and will call DoSomething() or DontDoSomething()