[Support] Add Num.abbreviate funciton

[kiaking]

We use this internally in GB's app and good have it in sefirot. We should add test and such. This method do things like:

Num.abbriviate(1_000, 0)     // '1K'
Num.abbriviate(1_250_000, 2) // '1.25M'

/**
 * Convert given number to abbriviated format such as `1K` or `1M`.
 */
export function abbreviate(num: number, precision = 0): string {
  const K = 1000
  const M = 1000000
  const B = 1000000000

  if (num >= K && num < M) {
    return `${(num / K).toFixed(precision)}K`
  }

  if (num >= M && num < B) {
    return `${(num / M).toFixed(precision)}M`
  }

  if (num >= B) {
    return `${(num / B).toFixed(precision)}B`
  }

  return String(num)
}

[brc-dd]

Simpler way: 😅

Intl.NumberFormat('en-US', {
  notation: 'compact',
  maximumFractionDigits: 2
}).format(1_250_000);

[kiaking]

OK I'm way behind on new JS stuff lol

[brc-dd]

Nah, this is too old. It's supported in IE too 🤣

[kiaking]

Oh no... Wait, please tell me it was supported from IE 11. Because the old means IE 6 for me 😏

[brc-dd]

Yeah, IE 11 😅 (I wasn't even born when IE 6 was launched 😅)

[kiaking]

I'm not sure if I should be happy about it 🤔

[cuebit]

I'm not sure if I should be happy about it 🤔

Be happy! You know elegant design because you’ve design constraints from IE6 nightmares 😂