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<g:if> logical or condition


<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

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?

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?

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?

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

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
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