I am reading some ES6 code with lambda and promisejs
.then(_ => current.quit())
I am wondering _ mean in the lambda expression. I tried to change it to (), it also work.
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1http://stackoverflow.com/questions/18300654/underscore-arrow-what-is-this – mplungjan Mar 29 '17 at 14:38
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It's a parameter name. Nothing special. `function foo(_) { ... }` or `function foo(bar) { ... }` – Mar 29 '17 at 14:39
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`_` means the same thing in ES6 as it has always meant since the beginning. Remember, we even have several libraries that use `_` the same way jQuery use `$` (lodash, underscore). It's just a variable name. You can replace it with `tmp` or `x` or `foo` – slebetman Mar 29 '17 at 14:50