using the & operator

gistfile1.txt

$ raku -MJSON::Fast -e '
loop {
  say to-json :!pretty, %(:type<bla>, :a(^100 .pick), :b(^100 .pick))
}
' | bin/eel -l=events2.log -e='
  event ble {
    has $a1 = #1.a;
    has $a2 = #2.a;
    has $b1 = #1.b;
    has $b2 = #2.b;
    match {[
      & bla(#1, a == 42, ?b == #2.b)
      & bla(#2, a == 13, ?b == #1.b)
    ]}
  }
'
{"a1":42,"a2":13,"b1":22,"b2":22,"timestamp":"2020-02-20T04:19:47.178670Z","type":"ble"}
{"timestamp":"2020-02-20T04:19:47.515712Z","type":"ble","b2":43,"b1":43,"a2":13,"a1":42}
{"b2":45,"type":"ble","timestamp":"2020-02-20T04:19:51.563406Z","a1":42,"a2":13,"b1":45}
{"b2":99,"type":"ble","timestamp":"2020-02-20T04:19:52.089484Z","a1":42,"a2":13,"b1":99}
{"b2":19,"type":"ble","timestamp":"2020-02-20T04:19:54.037338Z","a2":13,"a1":42,"b1":19}
{"b2":10,"type":"ble","timestamp":"2020-02-20T04:19:55.338196Z","a2":13,"a1":42,"b1":10}
{"b2":81,"timestamp":"2020-02-20T04:19:55.971652Z","type":"ble","a2":13,"a1":42,"b1":81}
{"b2":49,"timestamp":"2020-02-20T04:20:04.710167Z","type":"ble","a1":42,"a2":13,"b1":49}
{"a1":42,"a2":13,"b1":52,"b2":52,"timestamp":"2020-02-20T04:20:05.310459Z","type":"ble"}
{"b2":49,"timestamp":"2020-02-20T04:20:06.304376Z","type":"ble","a1":42,"a2":13,"b1":49}
^C