DamianMullins / Coinsly / #277

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69.44
/src/lib/coinHelper.js
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const filterByDenomination = (coins, denomination) =>
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  coins.filter(coin => coin.denomination === denomination);
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const filterCoins = (coins, filter, denomination) => {




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  const byDenomination = filterByDenomination(coins, denomination);




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  switch (filter) {




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    case 'Needed':




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      return byDenomination.filter(coin => !coin.owned);




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    case 'Owned':




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      return byDenomination.filter(coin => coin.owned);




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    default:




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      return byDenomination;




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  }




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};




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const getDenominations = coins => [





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  ...new Set(




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    coins.reduce((prev, coin) => {





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      if (coin.denomination) {





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        prev.push(coin.denomination);




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      }




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      return prev;




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    }, [])




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  )




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];




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export default {




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  filterCoins,




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  filterByDenomination,




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  getDenominations




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};




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