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More like functional programming #4

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4a72f3c
Update index.js
duck-oo May 6, 2020
7d595c1
Update index.js
duck-oo May 6, 2020
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33 changes: 13 additions & 20 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,24 +1,17 @@

module.exports = function newArray(start, end) {
var n0 = typeof start === 'number',
n1 = typeof end === 'number'
start = +start;
end = +end;
if (!isNaN(start) && isNaN(end)) {
end = start;
start = 0;
} else if (isNaN(start) && isNaN(end)) {
start = end = 0;
}

if (n0 && !n1) {
end = start
start = 0
} else if (!n0 && !n1) {
start = 0
end = 0
}
const len = end - start;
if (len < 0) throw new Error("array length must be positive");

start = start|0
end = end|0
var len = end-start
if (len<0)
throw new Error('array length must be positive')

var a = new Array(len)
for (var i=0, c=start; i<len; i++, c++)
a[i] = c
return a
}
const a = new Array(len).fill(start).map((x, y) => x + y);
return a;
};