| 1 | 'use strict';
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| 2 |
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| 3 | function declineWord(n, body, one = null, two_till_four = null, zero_or_five_till_nine = null) {
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| 4 | n = Math.abs(n % 100);
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| 5 | const n1 = Math.floor(n / 10);
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| 6 | const n2 = n % 10;
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| 7 |
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| 8 | if(!(body || one).match(/[a-z]/i)) {
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| 9 | one = one || '';
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| 10 | two_till_four = two_till_four || '';
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| 11 | zero_or_five_till_nine = zero_or_five_till_nine || '';
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| 12 | } else {
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| 13 | one = one != null ? one : '';
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| 14 | two_till_four = two_till_four != null ? two_till_four : 's';
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| 15 | zero_or_five_till_nine = zero_or_five_till_nine != null ? zero_or_five_till_nine : two_till_four;
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| 16 | }
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| 17 |
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| 18 | if(n1 !== 1) {
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| 19 | if(n2 === 1) {
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| 20 | return `${body}${one}`;
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| 21 | }
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| 22 | if(2 <= n2 && n2 <= 4) {
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| 23 | return `${body}${two_till_four}`;
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| 24 | }
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| 25 | }
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| 26 | return `${body}${zero_or_five_till_nine}`;
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| 27 | }
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| 28 |
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| 29 | module.exports = declineWord;
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