Add method pipe syntax to Dart to allow easy chaining/piping of expressions to in-scope methods

[kevmoo]

Anything of the form

g(f(expression))

Can be written as

expression |> f() |> g()

Basically, the expression on the left side of |> is passed as the first parameter of the function on the right of |>.

What about multiple arguments? Named arguments?

If you had function

int count(int a, int b, int c, {int d}) { ... }

You can call it as

count(1, 2, 3, d: 4);

or

1 |> count(2, 3, d: 4);

The "|>" symbol salad is open for discussion, of course.

[kevmoo]

Related blog post with a few examples: http://work.j832.com/2014/04/method-piping-dart-syntax-proposal.html

[gbracha]

This is not unreasonable. We'll have to discuss it in TC52. I suspect it will be awhile before it makes its way to the top of the agenda. We have smallish matters to propose before this - like async/await perhaps.

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Set owner to @gbracha.
Added Accepted label.

[DartBot]

This comment was originally written by @vicb

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relates to https://code.google.com/p/dart/issues/detail?id=16900

[kevmoo]

Giving credit to the first person to file this...

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Added Duplicate label.
Marked as being merged into #16900.