Support $cond and $select in expressions (or termary)

[esprehn]

Often you want to choose two things based on a predicate but there's no ternary operator so people just hack around it with {true: 'value1', false: 'value2'}[!!checkFunction()] which is far less readable.

Support:

$cond(checkFunction(), 'value1', 'value2')
$select(keyFunction(), {key1:'value1', key2: 'value2'})

Supporting a true ternary operator makes conditional function calls a little too easy, but supporting function forms of the operations means you get the same end result without that problem.

[IgorMinar]

I don't know. We should look at the Feedback code and compare how this change would affect it, vs supporting a true ternary operator.

Without seeing the effects, I'd lean towards the ternary operator instead of hacky functions.

[IgorMinar]

ternary operator support RFE: #719

[davispw]

Often this will work instead: "test && val1 || val2", which is equivalent if val1 is not falsy and sometimes what you want anyway. With this, I have gotten by without ternary expressions or hacks.

[petebacondarwin]

Closing. I think the consensus is that the ternary operator would be more suitable - use #719 for this discussion.