The plaintiffs, property owners in the City of New Brunswick, have brought this suit in lieu of prerogative writ pursuant to the provisions of L. 1949, c. 187, Â§ 9 (N.J.S.A. 40:55-21.1 et seq.) (and see also R.R. 4:88-2) to review, set aside and vacate findings and determinations of the planning board and of the governing body of the City of New Brunswick declaring and determining that the area comprising Blocks 104, 105, 117, 118 and 127 as shown on the official tax map of the city constitute a "blighted area" within the meaning of said L. 1949, c. 187. And plaintiffs further attack the constitutionality of said L. 1949, c. 187, and also seek damages allegedly suffered by them by reason of the alleged unlawful determination that plaintiffs several properties are located in the so-called "blighted area."