Can I use single variable for method that returns 2 parameters

Question

I have a simple question - can I use single value assignment while method returns 2 values (val and error)?

resp := http.Get("http://www.google.com/")

Possible duplicate of [Return map like 'ok' in golang on normal functions](http://stackoverflow.com/questions/28487036/return-map-like-ok-in-golang-on-normal-functions) — icza, Mar 03 '16 at 08:07

Charlie Tumahai · Accepted Answer · 2016-03-03T15:33:13.587

3

The number of operands on the left side of the assignment must match the number of values returned by the function.

You can use the blank identifier to ignore a return value:

resp, _ := http.Get("http://www.google.com/")

It's bad practice to ignore errors like this.

edited Mar 03 '16 at 15:33

answered Mar 03 '16 at 06:57

Charlie Tumahai

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Keep in mind that it's not good to ignore errors like that – cd1 Mar 03 '16 at 14:36

score 1 · Answer 2 · answered Mar 08 '16 at 13:22

From Go language specification :

A tuple assignment assigns the individual elements of a multi-valued operation to a list of variables. There are two forms. In the first, the right hand operand is a single multi-valued expression such as a function call, a channel or map operation, or a type assertion. The number of operands on the left hand side must match the number of values.

For instance, if f is a function returning two values, 
x, y = f() assigns the first value to x and the second to y.

The blank identifier provides a way to ignore right-hand side values in an assignment:

_ = x       // evaluate x but ignore it
x, _ = f()  // evaluate f() but ignore second result value

Can I use single variable for method that returns 2 parameters

2 Answers2