71 lines
1.7 KiB
JavaScript
71 lines
1.7 KiB
JavaScript
/**
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* Choose between singular or plural form based on the number of elements.
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*
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* @example
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* > choosePlural(1, 'example', '.s')
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* 'example'
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* > choosePlural(4, 'example', '.s')
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* 'examples'
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* > choosePlural(0, 'radius', 'radii')
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* 'radii'
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*
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* @param count Number of elements.
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* @param singular Singular form.
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* @param plural Plural form. An initial dot will be replaced by `singular`.
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* @return Appropriate form.
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*/
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const choosePlural = (count, singular, plural) =>
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{
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if (count === 1)
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{
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return singular;
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}
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else
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{
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return plural.replace(/^\./, singular);
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}
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};
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exports.choosePlural = choosePlural;
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/**
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* Join elements with the given separator and a special separator for the last
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* element.
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*
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* @example
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* > joinSentence(['apple', 'orange', 'banana'], ', ', ' and ')
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* 'apple, orange and banana'
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* > joinSentence(['apple', 'banana'], ', ', ' and ')
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* 'apple and banana'
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* > joinSentence(['banana'], ', ', ' and ')
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* 'banana'
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*
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* @param array Sequence of strings to join.
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* @param separator Separator for all elements but the last one.
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* @param lastSeparator Separator for the last element.
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* @return Joined string.
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*/
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const joinSentence = (array, separator, lastSeparator) =>
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{
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if (array.length <= 2)
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{
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return array.join(lastSeparator);
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}
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return array.slice(0, -1).join(separator)
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+ lastSeparator
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+ array[array.length - 1];
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};
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exports.joinSentence = joinSentence;
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/**
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* Check if a value is a JS object.
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*
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* @param value Value to check.
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* @return True iff. `value` is a JS object.
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*/
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const isObject = value => value !== null && typeof value === 'object';
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exports.isObject = isObject;
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