javascript - match string against the array of regular expressions

Question

Is there a way in JavaScript to get Boolean value for a match of the string against the array of regular expressions   The example would be  where the  if  statement is representing what I m trying to achieve    var thisExpressions       something      something else      and something else     var thisString    else    if  matchInArray thisString  thisExpressions

User · Accepted Answer

http   jsfiddle net 9nyhh 1   var thisExpressions     something    something else    and something else    var thisExpressions2     else    something else    and something else    var thisString    else    function matchInArray string  expressions         var len   expressions length          i   0       for    i  lt  len  i              if  string match expressions i                  return true                       return false       setTimeout function         console log matchInArray thisString  thisExpressions        console log matchInArray thisString  thisExpressions2       200

User · Answer

look this way     function matchInArray stringSearch  arrayExpressions       var position   String arrayExpressions  search stringSearch       var result    position  gt  -1    true   false     return result

User · Answer

You can join all regular expressions into single one  This way the string is scanned only once  Even with a sligthly more complex regular expression   var thisExpressions      something    something else    and something else    var thisString    else     function matchInArray str  expr        var fullExpr   new RegExp expr          map x  gt x source     Just if you need to provide RegExp instances instead of strings or                 map x  gt x substring 1  x length -2         if you need to provide strings enclosed by     like in original question           join                return str match fullExpr         if  matchInArray thisString  thisExpressions         console log   Match           In fact  even with this approach  if you need check the same expression set against multiple strings  this is a few suboptimal because you are building  and compiling  the same regular expression each time the function is called   Better approach would be to use a function builder like this   var thisExpressions      something    something else    and something else    var thisString    else    function matchInArray builder expr        var fullExpr   new RegExp expr          map x  gt x source     Just if you need to provide RegExp instances instead of strings or                 map x  gt x substring 1  x length -2         if you need to provide strings enclosed by     like in original question           join                    return function  str            return str match fullExpr                 var matchInArray   matchInArray builder thisExpressions    if  matchInArray thisString         console log   Match

User · Answer

You could use  test   which returns a boolean value when is find what your looking for in another string   var thisExpressions       something      something else      and something else     var thisString   new RegExp    b     else       b    i    var FoundIt   thisString test thisExpressions     if  FoundIt       DO STUFF

User · Answer

let expressions       something      something else      and something else      let str    else     here will be the check for following expressions   if  expressions find expression   gt  expression includes str             using Array  find   method to traverse array and  include to check substring

User · Answer

Using a more functional approach  you can implement the match with a one-liner using an array function   ECMAScript 6   const regexList     apple    pear    const text    banana pear   const isMatch   regexList some rx   gt  rx test text      ECMAScript 5   var regexList     apple    pear    var text    banana pear   var isMatch   regexList some function rx    return rx test text

User · Answer

So we make a function that takes in a literal string  and the array we want to look through  it returns a new array with the matches found  We create a new regexp object inside this function and then execute a String search on each element element in the array  If found  it pushes the string into a new array and returns        literal string  a regex search  like  thisword ig    target arr  the array you want to search  thisword ig for   function arr grep literal string  target arr      var match bin            o regex  a new regex object    var o regex   new RegExp literal string     for  var i   0  i  lt  target arr length  i            loop through array  regex search each element      var test   String target arr i   search o regex       if  test  gt  -1           if found push the element index into our matchbin      match bin push target arr i                return match bin        arr grep    this word   ig  someArray

User · Answer

Consider breaking this problem up into two pieces   filter out the items that match the given regular expression determine if that filtered list has 0 matches in it  const sampleStringData     quot frog quot    quot pig quot    quot tiger quot     const matches   sampleStringData filter  animal    gt   any regex here  test animal     if  matches length     0      console log  quot No matches quot

[javascript] javascript - match string against the array of regular expressions

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