86 lines
1.6 KiB
Markdown
86 lines
1.6 KiB
Markdown
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---
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id: 5a23c84252665b21eecc7edb
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title: Largest int from concatenated ints
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challengeType: 5
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forumTopicId: 302298
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dashedName: largest-int-from-concatenated-ints
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---
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# --description--
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Given a set of positive integers, write a function to order the integers in such a way that the concatenation of the numbers forms the largest possible integer and return this integer.
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# --hints--
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`maxCombine` should be a function.
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```js
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assert(typeof maxCombine == 'function');
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```
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`maxCombine([1, 3, 3, 4, 55])` should return a number.
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```js
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assert(typeof maxCombine([1, 3, 3, 4, 55]) == 'number');
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```
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`maxCombine([1, 3, 3, 4, 55])` should return `554331`.
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```js
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assert.equal(maxCombine([1, 3, 3, 4, 55]), 554331);
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```
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`maxCombine([71, 45, 23, 4, 5])` should return `71545423`.
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```js
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assert.equal(maxCombine([71, 45, 23, 4, 5]), 71545423);
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```
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`maxCombine([14, 43, 53, 114, 55])` should return `55534314114`.
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```js
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assert.equal(maxCombine([14, 43, 53, 114, 55]), 55534314114);
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```
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`maxCombine([1, 34, 3, 98, 9, 76, 45, 4])` should return `998764543431`.
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```js
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assert.equal(maxCombine([1, 34, 3, 98, 9, 76, 45, 4]), 998764543431);
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```
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`maxCombine([54, 546, 548, 60])` should return `6054854654`.
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```js
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assert.equal(maxCombine([54, 546, 548, 60]), 6054854654);
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```
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# --seed--
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## --seed-contents--
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```js
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function maxCombine(xs) {
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}
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```
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# --solutions--
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```js
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function maxCombine(xs) {
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return parseInt(
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xs
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.sort(function(x, y) {
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var a = x.toString(),
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b = y.toString(),
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ab = parseInt(a + b),
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ba = parseInt(b + a);
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return ab > ba ? -1 : ab < ba ? 1 : 0;
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})
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.join(''),
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10
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);
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}
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```
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