Boolean logical operation

Hello! Recently, at work, I was responsible for creating the code that returns something on two Boolean State. Something like: If Boolean has and Boolean B, return if Boolean is and B no Boolean etc something else.

At first I thought that the best way to do it would be a formula node with the return value is passed through a bunch of if else statements. Then I discovered that Booleans are not supported in notes formulas and forms knots are designed for writing formulas, and not for current programming, that makes sense.

I came with two ways to do it, but I felt that they were both quite stocky and they suck if I had more than 2 Boolean values my logic on the basis. Here is the code with the two different methods.

I feel like this is an operation that would be much better to do it in an if else statement in code and I would like to know if there is a better way to do this in LabVIEW.

Typical in LabVIEW is to combine Boolean both in a table, then use of the boolean to number table. This will give you a value between 0 and 3 (included). You can use a single case statement, or you can create a table of values of output desired and use it as an index in the table, or if there is a direct mapping of the enum, you can simply convert that number to the enumeration type.

Tags: NI Software

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Evaluation of the regular expression with logical operator
Hi all

I am little confused with expression with logical operator evaluation. I'm trying to understand the in expression.

-----
eXa.getTrue () & & eXa.getFalse () | eXa.getFalse () & & eXa.getTrue () | eXa.getFalse () is false and True Count: 1 False Count: 3

According to the agreement, it should be true with True Count: 1 False Count: 3
It must run the 1 getTrue() then 1stGetFalse() and getfalse() then 2nd jump 2nd getTrue() and must run 3rd fetFalse()

-----
eXa.getTrue () & & eXa.getTrue () | eXa.getFalse () & & eXa.getTrue () | eXa.getFalse () is true and true count: 2 False Count: 0

According to the agreement, it should be true with True Count: 3 False Count: 0
He must run getTrue() 2 1 1 getFalse() jump and run 3rd getTrue() and jump the last getFalse().

-----
eXa.getTrue () | eXa.getFalse () & & eXa.getFalse () | eXa.getTrue () & & eXa.getFalse () presents itself as true and true count: 1 False Count: 0

According to the agreement, it should be true with True Count: 2 False Count: 2
It must run 1 getTrue() and jump getFalse() 1st run 2nd getFalse() and then run getTrue() 2nd and 3rd then getFalse()

Please, help me understand above expressions.

Here is the definition of methods:

Private boolean getTrue() {}
trueCount ++;
Boolean retrunValue = 4 > 3;
Return retrunValue;
}

Private boolean getFalse() {}
falseCount ++;
Boolean retrunValue = 3 > 4;
Return retrunValue;
}

Thanks for your help
>

added parentheses to make order of the most obvious BSP. adding a "?" to show calls not executed.
```
(eXa.getTrue() && eXa.getFalse()) || (eXa.getFalse() && eXa.getTrue()) || eXa.getFalse()  comes as false and True Count: 1 False Count: 3

(T && F) = F
(F && ?) = F
(F) = F

F || F || F = F

(eXa.getTrue() && eXa.getTrue()) || (eXa.getFalse() && eXa.getTrue()) || eXa.getFalse()  comes as true and True Count: 2 False Count: 0 

(T && T) = T
(? && ?) = ?
(?) = ?

T || ? || ? = T

eXa.getTrue() || (eXa.getFalse() && eXa.getFalse()) || (eXa.getTrue() && eXa.getFalse())  comes as true and True Count: 1 False Count: 0

(T) = T
(? && ?) = ?
(? && ?) = ?

T || ? || ? = T
```

Boolean, int, operator precedence and good coding practices
I am learning Java and just C++. I sometimes met in the same method in the Java application that I learn / maintain within the same if-else blocks in the same method:

Boolean done;
State int;
...
If (finished & status == 1)
...
If (finished & & status == 1)

They result from the same based on the precedence of the operators.

Is there a reason to choose one over the other in terms of general practices?

My preference is that I use the & & when the intention is on each side of the operator, Boolean and & only when I mean bit-wise &. However, if there is another reason to choose the operator of bits in Java can someone let me know?

Thank you!
Aksarben wrote:
If one operand is a Boolean value that is virtually guaranteed to be a mistake.

If exaclty one of the operands is of Boolean type, it is a mistake, because they do not compile.

Save yourself the grief and use & unless both operands are an integral part and it is perfectly clear that you intend to a little wise operation.

Once again: This isn't the issue. In a given context, the single & is a bitwise AND (two numbers of operands) operation, or it's a logical operator AND (the two Boolean operands). With two operands, A and B, it is not possible to do a bitwise operation AND when you wanted to make a logical AND, or vice versa. For any pair of operands, as most of these operations will be semantically meaningful, and therefore the more be syntactically available.

So, again, use the single & with you want both operands to be assessed, regardless of whether the truth of the expression can be determined by the first single (that is, use it to jump a short circuit), happens when the second operand has a side effect that you always want to happen. And even then, in most cases, you would be better of just evaluation of expressions separately first, store it results into variables and then passing those is & or &, but preferably & because it is more common and less likely to cause confusion. The only real opportunity I could imagine using & is as a shortcut in a State of closure, and even then, it feels bit gross.
```
boolean & boolean : logical AND, no short-circuit
boolean && boolean : logical AND, with short-circuit
integer & integer : bitwise AND

integer & boolean : syntax error
boolean & integer : syntax error
integer && integer : syntax error

any_other_type & any_other_type : syntax error
any_other_type && any_other_type : syntax error
```
Edited by: jverd 8 February 2012 16:54

Logical operations on a string of bits

Hi, I have a very simple question that I can't seem to understand. I'd just like to perform logical operations (AND, GOLD, etc.) on 2 strings of bits that are 24 bits long each, however I can't find in the palette of functions a function that acts as a binary constant. I see that constant digital and hex functions. You can somone please let me know where I can find it. For example, I would AND ' 111111111111111111111111 '& ' 000000000000000000000000'.

You know the difference between numeric and string data types in LabVIEW? Blue = digital = integer. Pink = string. In the example you linked to, they use an integer constant when the display format is set to "binary". The 'b' of the constant indicates the radix, which in this case is 'binary '. Right-click on a digital constant and you can change its display format. You can select one of the predefined formats or you can specify a by clicking on the option "Advanced Editing Mode. Eligible formats are defined by using LabVIEW. For example

%b = binary

% 8 b = binary, using the width of minimum field of 8, fills spaces (for example, '1101')

% 08 = binary, using 8 minimum field width, filled with zeros (for example, "00001101")

Can I do regular expressions or Boolean logic in the search?

Can I do regular expressions or Boolean logic in the search? (Windows + F) Suppose I want to search pdf files or text files. I can go * .txt | * .pdf?

I searched for about an hour for a simple answer to this and this is the closest, I came, but it still not answering the question.

Can I use expressions simple boolian in instant search and if yes what are.

I think that AND and WOULDN'T cover 90% of what I want.

I want to search for emails for things such as [Minutes AND project x]

Currently, this property returns all the messeges with minutes and all messages with project x.
Since I have minutes of many projects, and many emails with project x not the minutes that returns are many. I would use a simple AND to get the intersection.

If and expression exist, I have found no reference to it.

According to me, the back had these expressions in the search function.

Thank you

Logical operations in SQL decode function?
Hello
Is it possible to perform logical operations in SQL decode function

as
' > '
' < '
' > ='
' < ='
'<>'.
not in
in
non-null
a null value

for example...

Select col1, order_by, decode (col1, > 10, 0, 1)
tab;

Select col1, order_by, decode (col1, <>0, 10, 1)
tab;

Select col1, order_by, decode (col1, not in (10,11,12), 0, 1)
tab;

Select col1, order_by, decode (col1, is set to null, 0, 1).
tab;

Kind regards

infantry

Published by: user780731 on April 30, 2009 12:07 AM

Published by: user780731 on April 30, 2009 12:07 AM

Published by: user780731 on April 30, 2009 12:08 AM

Published by: user780731 on April 30, 2009 12:08 AM

Published by: user780731 on April 30, 2009 12:09 AM
example:
```
select col1 ,order_by,case when col1 > 10 then 0 else 1 end
from tab;

select col1 ,order_by,case when col1 <> 10 then 0 else 1 end
from tab;

select col1 ,order_by,case when col1 not in (10,11,12) then 0 else 1 end
from tab;
```
Regarding testing for null, decode the handles which, by default, anyway, so that you can get decode or case easily...
```
select col1 ,order_by,decode (col1, null , 0 , 1)
from tab;

select col1 ,order_by,case when col1 is null then 0 else 1 end
from tab;
```

Boolean logic: Bit of activation & deactivation

Hello

I know how to turn a bit (bit high set) in LabVIEW. ********

For example, let's say I have 101, and I want to activate the Middle bit.

To activate the Middle bit, I would use the OR operation. 101 10 OR that would produce 111. I can do that in LabVIEW.

Check the attachments.

Can someone tell me how to disable some (low bit set) using LabVIEW? ******

Now let said I 111, and I want to disable the Middle bit in LabVIEW? I know that I should just use and operation.

111 with 101 will 101 AND. I don't know how to do this in LabVIEW. Please HELP.

Do you almost exactly the same thing you did to turn the bit. After the 2 ^ n function, reduce to zero the result (using Boolean does NOT work), which will give you all the bits set to 1 except the one you want. Then, you can use AND put just this bit to 0.

Accounts question: logical operator
Hi all

When I select 'Function' in the menu drop-down menu in the drop-down list box operator on the screen of the logical group of FDM 11.1.3, I get the following error:

The operator must be between 1 and 5 characters.

Why this error is coming?

I use a type of simple logical group.
I created a simple logic account to map to an account only source in my file to the input source.

Is this a bug?
Anyone of you has this encountered as well?

Thank you
ColDFire
Read this article KM. The solution is here:

https://support.Oracle.com/CSP/main/article?cmd=show&type=not&DOCTYPE=problem&ID=963032.1

Or logical operator
Hello

Why there is no way to set or logical restrictions for generic types?
```
public class MyClass{
    //you can add to this set only integers or strings, at runtime this set contains objects
    private Set<? extends integer || String> mySet;
}
```
Why there is no way to set or logical restrictions for generic types?

Because there is no way to use the resulting code, unless there is an interface or a common, whereby base class case is what you specify, is why the language gives you only a means to do so.

Logical operator in datatemplate query
Hello

I have trouble writing my questions in a datatemplate. The problem is, when I use the operators logic <>. More precise, my sql query has a condition of inferiority, but when I try to save the datatemplate with my application, I get an error message saying that the datatemplate is invalid.

It is obvious that the characters & lt; and & gt; will result in wells not correct xml, but is there a solution to this?

THX in advance
Kim

Published by: mulder82 on March 30, 2009 01:33
Hello
You can post your data model please?
< and="">not a problem for the xml structure, as they should be inside an element "CDATA".
Like this:







               SELECT name
OF THE Department
WHERE dept_no > 10
]]>

date function with logical operator does not...

Hi all

I saw table FINYEAR that having all the details of the fiscal year of the company. I have in my procedure according to user input identify current fiscal.

Data in table FINYEAR...

PATHDESC	FDATE	LDATE	CID	CLOSING	YEAR
April 1, 2010 to March 31, 2011	01/04/2010	31/03/2011	BCDTRA0003	H
April 1, 2011 to March 31, 2012	01/04/2011	31/03/2012	BCDTRA0003	H
April 1, 2012 to March 31, 2013	01/04/2012	03/31/2013	BCDTRA0003	H
April 1, 2013 to 31 March 2014	01/04/2013	31/03/2014	BCDTRA0003	S
March 31, 2015, 1 April 2014	01/04/2014	31/03/2015	BCDTRA0003

"I have two parameter in the procedure F_DATE = January 1, 2013 ', L_DATE = March 30, 2013.

Above the entrance I must identify period are what financial year.

Result must be this line... bcz F_DATE and L_DATE are with the fiscal year 2012-2013...

April 1, 2012 to March 31, 2013

01/04/2012

03/31/2013

BCDTRA0003

I try with the query below, but no luck... Please help in this regard

Select * from finyear where

Fdate < to_date('01/01/2013','DD/MM/RRRR')

and ldate < to_date('30/03/2013','DD/MM/RRRR') and cid = "BCDTRA0003";

Try this:

SELECT * FROM finyear

WHERE the to_date('01/01/2013','DD/MM/YYYY') BETWEEN fdate ldate AND

AND to_date('30/03/2013','DD/MM/YYYY') BETWEEN fdate ldate AND

AND cid = "BCDTRA0003";

How to get a column using the logical AND operator on two columns?

All columns are the VARCHAR2 data type.

I got out of the table in this way:

col1 col2
True True
True false
False false

but I want an extra column in this way:

col1 col2 result
True True True
True false false
Fake fake fake

as the clear sound output shows this column resut is logical operator AND
col1 and col2. How to get there?

WITH t AS
     (SELECT 'True' col1, 'True' col2 FROM DUAL
      UNION ALL
      SELECT 'True' col1, 'False' col2 FROM DUAL
      UNION ALL
      SELECT 'False' col1, 'True' col2 FROM DUAL
      UNION ALL
      SELECT 'False' col1, 'False' col2FROM DUAL)
SELECT col1,col2,CASE
          WHEN col1 = 'True' AND col2 = 'True'
             THEN 'True'
          WHEN col1 = 'True' AND col2 = 'False'
             THEN 'False'
             WHEN col1 = 'False' AND col2 = 'True'
             THEN 'False'
          WHEN col1 = 'False' AND col2 = 'False'
             THEN 'False'
       END AS RESULT
  FROM t

Boolean (reference), and boolean are incompatible

Hello

I have a sub VI who receives a reference to a Boolean input.

I need this reference to monitor the State of the Boolean input throughout the operation of the Sub VI.

The entrance is a stop button. The VI is supposed to frequently check the condition of the stop button, and in case it is true, stop its actions.

I put the refnum class be boolean, as follows (your language may vary):

In order to get the value of the reference, I just click on-> create-->--> the value property node.

It is the way I learned to get the properties of things.

It creates one of these smaller blocks of property node.

However, this value is not usable. When I try to connect it to an OR logical operator, LV complains of incompatible types.

Aparently a Boolean value (reference) can be compared to a Boolean value.

That makes no sense to me.

Could someone there explain please?

Why is there a difference?

There is another option available:

Make a right-click on the reference-> create-> property for the (strict) Boolean class-> value.

This creates a regular block of property node, with a Boolean value can be used.

This value is preset to display the correct properties.

What I got to the entrance of the this thread property node reference?

Or is this 'connected' to the reference in the same way as the other node 'Wireless '?

Please see image below which shows the two ways to retrieve the value:

Thank you for your help

Hi max,.

your property node type 'A' is not for a Boolean control, it seems to represent a reference as the value.

Edit: you have created a property node for your reference control. The "value" of this reference control will be of type 'reference' - no matter what the reference should point to. You need to connect cable a property node generic in the palette of functions to your control reference!

When you want to use 'generic' property nodes: right-click your Boolean control and "create-> reference. For this reference, you can create a control to get a reference appropriate control!

Application of logic gates on digital data... How does it work?

Hello

While working with labview, I tried to apply or digital data, he agreed the entry and responded to the output form digital too.

I did not understand how is - this work on a digital data when entering are supposed to be Boolean for the logical entry doors.

The outputs are also out of the assumption to 5 | 4 gives results 5.

Also, I am attaching my VI.

Please inform what is the logic behind this calculation.

Concerning

Hello

logical operations operate with integers (any will do) too. The integer is used at the level of the ILO...

The outputs are also out of the assumption to 5 | 4 gives results 5.

5 is "0101" in binary representation, 4 is "0100":
```
0101 OR
0100
____
0101 result
```

Logical search strategies
With the help of Oracle 9.2.0.8 on AIX, Oracle text. Front end .net

I have a very demanding client, requiring precise results (high relevance). Want it provide a simple search for end users (ala Google) interface, but take advantage of more advanced in the back-end logic. We deal with only the French and English content... for most of indexing CLOB and varchar2s.

The dilemma I face to, is the end user is not familiar with Oracle Advanced search syntax, but still want accurate and relevant results... "The advanced search screen offers 3 text boxes, 'All words', exact phrase" and "words". There is also a 'part of the word' checkbox, when enabled, tells stored proc to make a joker on each keyword match.

Based on what text box is selected, the stored procedure injects the appropriate Boolean operators and encapsulates each term with a BLUR (70, weighted score) operator...

The current implementation of research, according to them, sucks.

I was responsible to improve the results of the research... so far I have set up the following:

-conversion of base_letter
-arising (index stems)
-fuzzy matching enabled
-skipjoins for hyphens (treat words as post-secondary education)
-index_themes, prove_themes (on request)
-index of the substring (for wildcard matching)

I also have a user_datastore to combine the 3 columns (a varchar2 and two CLOB) that were previously indexed separately and controlled on the varchar2 and column scores a clob.

I also replaced it with FUZZY query operator searches using 'a WAY' integrated knowledge base.

With these changes, they find the results improved, but I think that you can make more.

The stored procedure strips on special characters (used by Oracle Text in the control unit) in the query terms and injects its own operators and Boolean logic based on what text box was used to submit the query.

Is there a better way to do it? There seems to be a delicate balance between maintaining the simple search interface, while still developing advanced search on the back-end functions.

Some scenarios I played wiith:

-Wrap each with a CONNECTION query term, GOLD ' ing or AND'ing of each term, depending on whether the user entered terms in 'words' or 'all words '. Problem here is WHAT ignores special characters... even a hyphen which is part of a Word, even if I escape by using "-" or "{"... base don feedback: query, words like "post-secondary" will be searched as:

Search for ALL words, 1, 0, CRT ACCUMULATE, 1
Search for all words, 2, 1 CRT, on, posting, 1
CRT search for all words, 3, 1, SUBJECT, secondariness, 2

How a handful of Oracle research? Asktom?

Thanks for the tips and advice

Stéphane
Any chance of move you to a supported version, I guess?

The best way to improve the relevance without losing callback is to use the Progressive Relaxation - see
http://www.Oracle.com/technology/products/text/htdocs/prog_relax.html
but unfortunately this requires 10g.

Otherwise, you might try something like this:

Application of single word for dog:

(dog) * 4, subject (dog) * 3% * 2 dog,? dog * 1

The ',' is the ACCUM operator and the "*" multiplies the score. So we say that a match exact higher scores, followed by a generic, followed by a fuzzy character followed by a theme.

Several Word searches, looking for searches of words to match highest, followed by and, followed by or. So for a search for 'black dog '...

(black dog) * 4 (black and dog) * 3, (about (black) and about (dog)) * 2.5, (black or dog) * 2, (% black and dog%)*1.5, (black or dog %) * 1... etc.)

There are some combinations missing here - and it will get exponentially more complex with terms more, but you get the picture. In addition, you could be smart when dealing with sentences...

"camping or hiking in Western Europe"-there are three groups of Word it: camping, hiking, and western europe. Looking for empty words will help you separate sentences, then you can search for 'western europe', which appears in the same place but worry not "camping hiking" or "hiking western."

Moreover, I do not recommend using SUBSTRING_INDEX. It is useful when you perform wildcard searches, and it is rarely necessary to search for % black or dog %. SUBSTRING_INDEX will greatly increase the size and timing of the generation of your index.

Published by: Roger Ford on February 12, 2010 09:28

Boolean logical operation

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