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kotlinlang

Is `new HashMap() {{ put("this", true) }};` == `mapOf("this" to true)` (note the double `{{`)?

Don't do `{{ }}` in frequently executed code. Each time anonymous class is created, in the days of PermGenSpace this would kill a lot of apps, nowdays it will probably just cause a slow growing memory hog which could potentially cause OutOfMemory error down the line. I think `{{ }}` should only be allowed during app initialization (which would ensure that only finite number of anonymous classes are generated) and nowhere else.

That said I'm not 100% sure I'm right, it's been 5-6 years since I researched this moment :slightly_smiling_face:

I was assuming the OP wanted to use `mapOf(...)` instead; at least, I hope so :wink:

Yup, looks like it, but I got burned on double braces at some point in my professional life, so I can't be silent :smile:

Right, I want mapOf instread, but in the odoo xmlrpc docs, they have that for the java example...