Apple Archives - IT Nursery

Typescript Type ‘string’ is not assignable to type

Update As mentioned in @Simon_Weaver’s answer, since TypeScript version 3.4 it’s possible to assert it to const: let fruit = “Banana” as const; … Read more

How do you detect the host platform from Dart code?

by IT Nursery

import ‘dart:io’ show Platform; if (Platform.isAndroid) { // Android-specific code } else if (Platform.isIOS) { // iOS-specific code } All options include: Platform.isAndroid … Read more

Scatter plot with different text at each data point

by IT Nursery

I’m not aware of any plotting method which takes arrays or lists but you could use annotate() while iterating over the values in … Read more

How do I add Git submodule to a sub-directory?

by IT Nursery

You go into ~/.janus and run: git submodule add <[email protected] …> snipmate-snippets/snippets/ If you need more information about submodules (or git in general) … Read more

Handling errors in Promise.all

by IT Nursery

Promise.all is all or nothing. It resolves once all promises in the array resolve, or reject as soon as one of them rejects. … Read more

Why does calling react setState method not mutate the state immediately?

by IT Nursery

From React’s documentation: setState() does not immediately mutate this.state but creates a pending state transition. Accessing this.state after calling this method can potentially … Read more

How do I delete items from a dictionary while iterating over it?

by IT Nursery

For Python 3+: >>> mydict {‘four’: 4, ‘three’: 3, ‘one’: 1} >>> for k in list(mydict.keys()): … if mydict[k] == 3: … del … Read more

How to create a yes/no boolean field in SQL server?

by IT Nursery

The equivalent is a BIT field. In SQL you use 0 and 1 to set a bit field (just as a yes/no field … Read more

Command to get time in milliseconds

by IT Nursery

date +”%T.%N” returns the current time with nanoseconds. 06:46:41.431857000 date +”%T.%6N” returns the current time with nanoseconds rounded to the first 6 digits, … Read more