Package edu.stanford.nlp.ling

Examples of edu.stanford.nlp.ling.CoreLabel.index()

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  /** Returns a 0-based index of the head of the tree.  Assumes the leaves had been indexed from 1 */
  static int headIndex(Tree tree) {
    CoreLabel label = ErasureUtils.uncheckedCast(tree.label());
    Tree head = label.get(TreeCoreAnnotations.HeadWordAnnotation.class);
    CoreLabel headLabel = ErasureUtils.uncheckedCast(head.label());
    return headLabel.index() - 1;
  }

  /** Returns a 0-based index of the left leaf of the tree.  Assumes the leaves had been indexed from 1 */
  static int leftIndex(Tree tree) {
    if (tree.isLeaf()) {
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  /** Returns a 0-based index of the left leaf of the tree.  Assumes the leaves had been indexed from 1 */
  static int leftIndex(Tree tree) {
    if (tree.isLeaf()) {
      CoreLabel label = ErasureUtils.uncheckedCast(tree.label());
      return label.index() - 1;
    }

    return leftIndex(tree.children()[0]);
  }
   
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  /** Returns a 0-based index of the right leaf of the tree.  Assumes the leaves had been indexed from 1 */
  static int rightIndex(Tree tree) {
    if (tree.isLeaf()) {
      CoreLabel label = ErasureUtils.uncheckedCast(tree.label());
      return label.index() - 1;
    }

    return rightIndex(tree.children()[tree.children().length - 1]);
  }

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    // This helps detect ma+_+sh in dialect, as well as avoiding segmenting possessive
    // pronouns if the word starts with al-.
    if (c.word().length() > 3) {
      String start = c.word().substring(0, 2);
      String end = c.word().substring(c.word().length() - 2);
      if (c.index() == 2) {
        features.add(start + "_" + end + "-begin-wrap");
      }
      if (c.index() == c.word().length() - 1) {
        features.add(start + "_" + end + "-end-wrap");
      }
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      String start = c.word().substring(0, 2);
      String end = c.word().substring(c.word().length() - 2);
      if (c.index() == 2) {
        features.add(start + "_" + end + "-begin-wrap");
      }
      if (c.index() == c.word().length() - 1) {
        features.add(start + "_" + end + "-end-wrap");
      }
    }
   
    return features;
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