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<g:if> logical or condition

By : user2955761
Date : November 22 2020, 10:48 AM
this will help In grails gsp, instead of , Just for the sake of DRYness:
code :
``````<%@ page import="grails.util.Environment" %>
<g:if test="\${Environment.current in
[Environment.PRODUCTION, Environment.DEVELOPMENT]}">
<h1>xyz</h1>
</g:if>
``````

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Issue with a logical condition to find the value lies in which logical set

By : Android Mobile
Date : March 29 2020, 07:55 AM
Hope that helps We have a generic slider functionality implemented in our product. We need to read the item index value from URL and scroll the slider to show the active item. , You can try :
code :
``````scrollAmount = '-=' + 772 * ~~((activeItem - 1) / 5);
``````

If condition on modulo, failing logical condition?

By : Overcast
Date : March 29 2020, 07:55 AM
help you fix your problem The condition a%2 is equivalent to a%2 != 0, i.e. it tests if a is not divisible by 2. From De Morgan's Laws, the condition if(!(a%2 && b%2)) is equivalent to if(!(a%2) || !(b%2)) or if((a%2 == 0) || (b%2 == 0)), which is not what you want.
You really want to test if((a%2 == 0) && (b%2 == 0)) -- that is, if both are divisible by 2, not if either is divisible by 2. Writing it this way is also much less confusing.

Is there a logical way to do this condition?

By : Kalon Scott
Date : March 29 2020, 07:55 AM
I wish this help you After testing out a few possibilities, I think that in_array() is your best option. John's answer is one of those and the original / first answer given; this is just a supplement to.
You could do it this way and setup an array beforehand, if that is what you're looking to do, for any other added variables.
code :
``````\$var1 =  "foo"; // yep
\$var2 =  "foo2"; // nope
\$var3 =  "foo3"; // nope
\$var4 =  "foo"; // yep

\$vars = array("\$var1","\$var2","\$var3","\$var4");
if (in_array("foo", \$vars)) //Founds a match !
{
echo "Yep";
}

else
{
echo "Nope";
}
``````

How to create logical variable based on logical condition?

By : Cev
Date : March 29 2020, 07:55 AM
should help you out I have a data frame with factor variables , Just do
code :
``````df\$result <- with(df, a==b)
df
#  a b result
#1 a c  FALSE
#2 b b   TRUE
#3 c a  FALSE
``````
`````` with(df, as.character(a)==as.character(b))
``````
`````` Un1 <- union(levels(df\$a), levels(df\$b))
df[] <- lapply(df, factor, levels=Un1)
with(df, a==b)
``````

Why both condition are checked in logical AND operation in csh if first condition return false

By : ezra
Date : March 29 2020, 07:55 AM
Does that help use \$? to check if the var is defined:
if (\$?HOME_EXIST) then (do whatever you want) endif