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Most regex search engines will match any part of a word. In these cases ^ and $ are used to anchor searches to the beginning and end of a word, respectively. However, since V‑Spark regex searches will only match whole words, these special anchors are not required and not valid except as literal characters. As an example, for the word "abcde":

ab.* # match
abcd # no match
^abcd # no match
abcd$ # no match