functionpartialSort$(x,n,fc,fm,fs)// x:  an array (updated!)// n:  minimum number of values to sort// fc: compare function (a, b)// fm: map function (v, i, x)// fs: swap function (x, i, j)

constxarray=require('extra-array');// Partially sort, such that first 2 values are guaranteed to be sorted.varx=[4,-3,1,-2];xarray.partialSort(x,2);// → [ -3, 1, 4, -2 ]  (x is updated!)x;// → [ -3, 1, 4, -2 ]// Partially sort using absolute values.varx=[4,-3,1,-2];xarray.partialSort(x,2,null,v=>Math.abs(v));// → [ 1, -3, 4, -2 ]

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