github.com/benhoyt/goawk@v1.8.1/testdata/t.a (about)

     1  	{if (amount[$2] "" == "") item[++num] = $2;
     2  	 amount[$2] += $1
     3  	}
     4  END	{for (i=1; i<=num; i++)
     5  		print item[i], amount[item[i]]
     6  	}