added 8 characters in body

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edited Apr 7, 2017 at 14:16

JavaScript ES6, 6161 59 bytes

Thanks @Luke for golfing off 68 bytes

x=>(a=[x=>[...x]).map((p,i,a)=>a[i]=/\d/.test(p)?a[i-1-p]:p).join``

JavaScript ES6, 61 bytes

Thanks @Luke for golfing off 6 bytes

x=>(a=[...x]).map((p,i)=>a[i]=/\d/.test(p)?a[i-1-p]:p).join``

Thanks @Luke for golfing off 8 bytes

x=>[...x].map((p,i,a)=>a[i]=/\d/.test(p)?a[i-1-p]:p).join``

Post Undeleted by fəˈnɛtɪk

occurred Apr 7, 2017 at 13:52

added 201 characters in body

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edited Apr 7, 2017 at 13:52

fəˈnɛtɪk

Thanks @Luke for golfing off 6 bytes

x=>xx=>(a=[.split``..x]).map((p,i)=>=>a[i]=/[0-9]\d/.test(p)?x[ia[i-1-p]:p).join``

x=>x.split``.map((p,i)=>/[0-9]/.test(p)?x[i-1-p]:p).join``

Thanks @Luke for golfing off 6 bytes

x=>(a=[...x]).map((p,i)=>a[i]=/\d/.test(p)?a[i-1-p]:p).join``

Post Deleted by fəˈnɛtɪk

occurred Apr 7, 2017 at 13:44

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answered Apr 7, 2017 at 13:42

fəˈnɛtɪk

x=>x.split``.map((p,i)=>/[0-9]/.test(p)?x[i-1-p]:p).join``