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TypescriptTutor @TypescriptTutor

Daily TS tips and answered questions

Joined March 2020
  • Tweets 88
  • Following 0
  • Followers 173
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Oh boy do I appreciate having optional chaining in #TypeScript
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TypescriptTutor retweeted
TypeScript
@typescript
20 Aug 2020
🥳🎉 TypeScript 4.0 is here! 🎉🥳 Read up on what's new and get it today! devblogs.microsoft.com/types…
TypeScript 4.0 brings variadic tuples, labeled tuple elements, class property inference, new assignment operators, safer exception handling with 'unknown' in catch clauses, custom JSX factories, some great editor improvements, and more!

ALT TypeScript 4.0 brings variadic tuples, labeled tuple elements, class property inference, new assignment operators, safer exception handling with 'unknown' in catch clauses, custom JSX factories, some great editor improvements, and more!

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What feature are you most excited in #Typescript v4? devblogs.microsoft.com/types…

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Which go you use more often?
77% Interfaces
23% Types
22 votes • Final results
In your TS projects which do you prefer?
78% strict: true
22% strict: false
23 votes • Final results
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Leave a comment with “why”
As of Typescript 3.7, you can use the “?.” syntax called “Optional Chaining” to safely navigate deep properties that might be undefined. typescriptlang.org/docs/hand…
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Use an abstract class to define methods to be implemented in classes that extend it. Typescript will throw compiler errors if they aren’t implemented correctly. typescriptlang.org/docs/hand…
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A nice little treat from Typescript 3.8, you can now export * as namespace! Check it out!
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Have a hard time remembering the difference between for..in and for..of loops? for *in* iterated *IN*dexes for *of* iterates *o*bjects (or the elements of the iterable)
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The “Parameters” built-in utility type returns a tuple type describing the arguments passed to a provided function signature. Any terms there you don’t understand? Just ask! There’s no such thing as a bad question. typescriptlang.org/docs/hand…
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The “NonNullable” built-in utility type removes the possibility of `undefined` or `null` from a type. typescriptlang.org/docs/hand…
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One more #TypescriptQuiz today! Which element does not belong in an array of the following type? Array<Record<string, string | number>>
33% { [1]: 1 }
4% { b: 2 }
59% { c: true }
4% { d : 'd' }
27 votes • Final results
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The “Extract” built-in utility type filters only the types from the first that are included in the second argument. typescriptlang.org/docs/hand…
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Here's my first ever #TypescriptQuiz! Name the built-in type that should replace the highlighted question marks. (Select your answer in the poll below)
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Name the built-in type that should replace the highlighted question marks.
8% Extract
76% Pick
4% Select
12% Subset
74 votes • Final results
The “Exclude” built-in utility type removes all types from the first argument that match match the second argument. typescriptlang.org/docs/hand…
The “Omit” built-in uitility type is used to keep all properties of a given type *except* for the ones passed in the second argument. typescriptlang.org/docs/hand…
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TypescriptTutor retweeted
Tomasz Łakomy
@tlakomy
4 Mar 2020
If you're interested in TypeScript, go follow @TypescriptTutor immediately , they're just starting and I absolutely love the trend (?) of "Daily X tips"
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The “Pick” built-in utility type is used for selecting a subset of keys from another type. Every key you want must be listed as the second argument. typescriptlang.org/docs/hand…
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