With TypeScript 2.0, the type checker analyses all possible flows of control in statements and expressions to produce the most specific type possible (the narrowed type) at any given location for a local variable or parameter that is declared to have a union type. Previously, the type analysis performed for type guards was limited to if statements and ?: conditional expressions and didn’t include effects of assignments and control flow constructs such as return and break statements. TypeScript 2.0 implements a control flow-based type analysis for local variables and parameters. In practical terms, strict null checking mode requires that all files in a compilation are null- and undefined-aware. Thus, declaration files that are updated to use null- and undefined-aware types can still be used in regular type checking mode for backwards compatibility. In particular, the null and undefined types are automatically erased from union types in regular type checking mode (because they are subtypes of all other types), and the ! non-null assertion expression operator is permitted but has no effect in regular type checking mode. The new features are designed such that they can be used in both strict null checking mode and regular type checking mode. The same is true for the relationship of T to T | null. So, whereas T and T | undefined are considered synonymous in regular type checking mode (because undefined is considered a subtype of any T), they are different types in strict type checking mode, and only T | undefined permits undefined values. In strict null checking mode, the null and undefined values are not in the domain of every type and are only assignable to themselves and any (the one exception being that undefined is also assignable to void). StrictNullChecks switches to a new strict null checking mode. The type checker previously considered null and undefined assignable to anything.Įffectively, null and undefined were valid values of every type and it wasn’t possible to specifically exclude them (and therefore not possible to detect erroneous use of them). Previously it was not possible to explicitly name these types, but null and undefined may now be used as type names regardless of type checking mode. Is it easy to switch storage locations? Just got my drive enclosure so will want to switch the location from the ssd to the external drive.TypeScript has two special types, Null and Undefined, that have the values null and undefined respectively. That would be a huge plus using my mom's fios credentials and integrating some of those apps into it. This would be a plus over the Mini and be similar to the tivo dvr. Not a con, but I haven't figured it out yet, is to get the PIP going when going from live TV to the guide. Come September, this could be frustrating although it's not something done daily. Setting up passes for shows next week was quite annoying. Scrolling forward and back through days is Uber time consuming. Not sure why channels doesn't allow you to delete a channel and Yoy have to resort to favorites and selecting that option for the guide. Only cons so far that I see are channel up/down goes through every channel and not just favorites. A little slow, but function wise it's in line with my Minis. So I'm up and running from the laptop and playing with it on my little projector. But instead, you can get that same kind of full-fledged DVR+streamer functionality if you use the TS4K in conjunction with a Channels DVR server as opposed to using it in conjunction with a TiVo DVR. You know how everyone on this forum seems to want the TS4K to act like a full-fledged TiVo Mini? Well, that's still not available. You can now use the TS4K remote's channel up/down, guide, skip, live, and 0-9 buttons with Channels DVR. I'm not aware of any other streaming device on the market that has a remote control that's really customized for channel-based TV and DVR functionality. This thread is talking about using the TiVo Stream 4K as a front-end viewing device for Channels DVR with the benefit of a TiVo remote control that is customized for use with Channels DVR. Note that what I'm talking about isn't running the Channels DVR server software on the TiVo Stream 4K itself (which is what that thread is about). Click to expand.I did check that thread before creating this one and didn't see anything about the info I posted.
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