[SPARKR][DOC] regexp_extract should doc that it returns empty string when match fails#14934
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felixcheung wants to merge 1 commit intoapache:masterfrom
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[SPARKR][DOC] regexp_extract should doc that it returns empty string when match fails#14934felixcheung wants to merge 1 commit intoapache:masterfrom
felixcheung wants to merge 1 commit intoapache:masterfrom
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Commits on Sep 2, 2016
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