Checklist

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• Read and understood the [Code of Conduct][code-of-conduct].
• Searched for existing issues and pull requests.

Description

Description of the issue.

The following code produces an array whose shape does not match what I'd expect:

Handle 0x1101, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x1000
	Error Information Handle: Not Provided
	Total Width: 72 bits
	Data Width: 64 bits
	Size: 4096 MB
	Form Factor: DIMM
	Set: 1
	Locator: DIMM_A2 
	Bank Locator: Not Specified
	Type: DDR3
	Type Detail: Synchronous Registered (Buffered)
	Speed: 1600 MHz
	Manufacturer: 00AD04B300AD
	Serial Number: 4A87CE52
	As

Is your feature request related to a problem? Please describe.

R.filter doesn't expose index to the predicate function. Let's create a function that does and call it filterIndexed.

Describe the solution you'd like

filterIndexed((v, idx) => idx === 0, [1, 2, 3); // => [1]

Possible implementation

const filterIndexed = R.addInd

Here we're re-exporting methods of ethjs-util:

https://github.com/ethereumjs/ethereumjs-util/blob/3b1085059194b02354177d334f89cd82a5187883/src/index.ts#L2-L5

But because they're manually added to the exports object, typescript is not adding type definitions for them and Typescript users get an error when using one of those methods, e.g. stripHexPrefix.

function Foo() {
  return <div />
}

export default React.memo(Foo);

Results in:

<[object Object] />

See facebook/react#14319

Opening an issue here to track the progress, and see what we can do.
The thing is we need the displayName not only for DEV env, but also production.