Created
          November 22, 2017 06:01 
        
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    filterEnum in typescript
  
        
  
    
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  | /** | |
| * Filters am emum to only return the keys represented in it | |
| * | |
| * How is this not built into the language? | |
| * https://stackoverflow.com/a/21294925/511710 | |
| * https://noahbass.com/posts/typescript-enum-iteration | |
| * | |
| * @param {{}} e | |
| * @returns | |
| */ | |
| function filterEnum(e: {}) { | |
| return Object.keys(e).filter(v => isNaN(Number(v))); | |
| } | 
  
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