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join elements of an array of strings using a ', ' and for the last one use an ' and ', e.g., for a readable author list
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| const happyAnd = (strings) => | |
| strings.length === 0 ? '' : strings.reduce((text, value, i, array) => | |
| text + (i < array.length - 1 ? ', ' : array.length > 2 ? ', and ' : ' and ') + value); |
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