Javascript method names abbreviator

gistfile1.txt

//shrink=n=>n[0]+n.split('').map(c=>(c<='Z')?c:'').join('')
//keys = (_=o=>o?Object.keys(o).concat(_(o.__proto__)):[])
//abbrev=function(x) { keys(x).forEach(k=>(x[shrink(k)]=x[k])) }

//shrink=n=>n[0]+n.split('').map(c=>(c<='Z')?c:'').join('')
//abbrev=function(x) { (_=o=>o?Object.keys(o).concat(_(o.__proto__)):[])(x).forEach(k=>(x[shrink(k)]=x[k])) }

abbrev=function(x) { (_=o=>o&&(Object.keys(o).forEach(k=>(x[(n=>n[0]+n.split('').map(c=>(c<='Z')?c:'').join(''))(k)]=x[k])),_(o.__proto__)))(x) }