How do I check if a string is empty or not?

chaudharyparesh

function check($arg)
{

//here i want to check $arg is empty or not

}
check(""); //contain no space
check(" "); //contain space

can i use isBlankOrNull($arg)


Thanks Advance

chaudharyparesh

Dear narayan,

i am doing like

var $StrToCheck= $arg.replace(/^\s+|\s+$/, '');

//then we check for the length of the string if its 0 or not
if( StrToCheck.length==0) {
return true;
}
else
return false;

Any other way for same .

Thanks
Paresh

narayan

Hi Paresh,

I am not sure what your intention is. Could you specify what check("") and check(" ") should return?

Regards,
Narayan

chaudharyparesh

Sorry just replace function name so you can easily understanding what my intention is
here i want to check function argument in called function( getTab) is contain string,space or nothing

function getTab($arg)
{
//here i want to check argument string if it's contain nothing (case 1) or space(case 2) then i want to return false and if it's contain string (case 3)then return true
}
case 1 : getTab("") ; //here passing nothing between parentheses
case 2: getTab(" "); //here passing space between parentheses
case 3: getTab("hi"); //here passing string between parentheses

narayan

Yes, then what you are doing is correct.

function isBlank($arg)
{
return $arg.replace(/^\s+|\s+$/g, '') == "";
}

Some tips:
1) Always name the function correctly (so that you understand what it means when you look at it 2 months later)
2)
if (condition) {
return true;
} else {
return false;
}

is the same as

return condition;

Regards,
Narayan

chaudharyparesh

Thanks