Getting rows from dynamic table using variables

Question

I discovered that I can do this to grab rows of a dynamic table between 2 and 5:

var limitTable = $(table).find('tr:gt(2):lt(5)');

But I can't do this:

var temp1 = 2;
var temp2 = 5;

var limitTable = $(table).find('tr:gt(temp1):lt(temp2)');

In my situation, I can't hard code values in the "gt( )" and "lt( )". It will depend on an incremented variable. Not sure what to do. JSFIDDLE

need to use string concatenation to create the final selector using your variables — charlietfl
– charlietfl, Commented Dec 17, 2014 at 19:15

Claudio Redi · Accepted Answer · 2014-12-17 19:14:22Z

1

You have a mistake on your strategy to use temp1 and temp2. Use this to build the condition dynamically (notice how I concatenate variables)

var limitTable = $(table).find('tr:gt(' + temp1 + '):lt(' + temp2 + ')');

answered Dec 17, 2014 at 19:14

Claudio Redi

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3 Comments

Thanks. I understand string concatenation but if I have temp1 = 2, what's +temp1+? Not sure I understand.

@Matthew Moon: the concatenation will add the value of temp1 (in your case 2). The result will be 'tr:gt(2) for temp1=2

I see. It's the first time I've seen the +var+ notation. Thanks.