LINQ

[Charles]

I was asked in an email:

What are your plans for LINQ (Expression, Lambda, ...) support in cobra?

The plan is to fully embrace it. Right now Cobra has LINQ Jr:

names = for name in names where name.trim.length get name.trim

So you can enumerate, filter and transform. Obviously there's a lot missing and it's not backed by expression trees so it's not the "real thing". But it was a good start for .NET 2.0.

[neuruss]

So I assume that you are not looking to implement list comprehensions (ala python), since Linq offers the same capabilities.
Is that right?

[Charles]

What Cobra currently offers matches Python's list comprehensions in capability. The syntax is different for two reasons.

One is to match the order that you would use with the statements approach:

results = []
for name in names
    if name.trim.length
        results.add(name)
names = results
# expression version is same order; reuses brain space:
names = for name in names where name.trim.length get name.trim

The other is to support Intellisense:

names = for name in names where name.trim.length get name._

In Python, they put the transformation expression first:

Code: Select all

names = name._

No Intellisense for you!