Github user cestella commented on the issue:
https://github.com/apache/incubator-metron/pull/517
So, the syntax chosen here for lambda expressions is `&(var_0, var_1, ...,
var_n : expr)`. This seemed like the simplest option to me, but it's possible
that we should mimic existing systems such as:
* Pythonish: `lambda var_0, var1, ..., var_n : expr`
* Javaish: `(var_0, var_1, ..., var_n) -> expr `
* Scalaish: `(var_0, var_1, .., var_n) => expr`
Is there any feedback on the syntax? Would you like to see something
different?
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