| // Copyright 2019 Ron Buckton. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: The properties of the "indices" array correspond to the start/end indices of the same values in the match. |
| includes: [compareArray.js] |
| esid: sec-makeindicesarray |
| features: [regexp-match-indices] |
| info: | |
| MakeIndicesArray ( S, indices, groupNames ) |
| 4. Let _n_ be the number of elements in _indices_. |
| ... |
| 6. Set _A_ to ! ArrayCreate(_n_). |
| ... |
| 11. For each integer _i_ such that _i_ >= 0 and _i_ < _n_, do |
| a. Let _matchIndices_ be _indices_[_i_]. |
| b. If _matchIndices_ is not *undefined*, then |
| i. Let _matchIndicesArray_ be ! GetMatchIndicesArray(_S_, _matchIndices_). |
| c. Else, |
| i. Let _matchIndicesArray_ be *undefined*. |
| d. Perform ! CreateDataProperty(_A_, ! ToString(_n_), _matchIndicesArray_). |
| ... |
| ---*/ |
| |
| let input = "abcd"; |
| let match = /b(c)/.exec(input); |
| let indices = match.indices; |
| |
| // `indices` has the same length as match |
| assert.sameValue(indices.length, match.length); |
| |
| // The first element of `indices` contains the start/end indices of the match |
| assert.compareArray(indices[0], [1, 3]); |
| assert.sameValue(input.slice(indices[0][0], indices[0][1]), match[0]); |
| |
| // The second element of `indices` contains the start/end indices of the first capture |
| assert.compareArray(indices[1], [2, 3]); |
| assert.sameValue(input.slice(indices[1][0], indices[1][1]), match[1]); |