multiple conditions for JavaScript includes method

Question

Just wondering  is there a way to add multiple conditions to a  includes method  for example       var value   str includes  hello    hi    howdy      Imagine the comma states  or    It s asking now if the string contains hello  hi or howdy  So only if one  and only one of the conditions is true   Is there a method of doing that

User · Answer

Extending String native prototype   if   String prototype contains        Object defineProperty String prototype   contains             value patterns                if   Array isArray patterns                     return false                             let value   0              for  let i   0  i  lt  patterns length  i                      const pattern   patterns i                   value   value   this includes pattern                             return  value     1                         Allowing you to do things like   console log  Hi  hope you like this option  toLowerCase   contains   hello    hi    howdy         True

User · Answer

Another one     x000D   x000D  let result x000D   x000D  const givenStr    A  X    values separated by comma or space  x000D   x000D  const allowed      A    B   x000D  const given      givenStr split    s      filter v   gt  v  x000D   x000D  console log  given  array     given  x000D   x000D     given contains none or only allowed values  x000D   x000D  result   given reduce  acc  val    gt    x000D    return acc  amp  amp  allowed includes val  x000D     true  x000D   x000D  console log  given contains none or only allowed values    result  x000D   x000D     given contains at least one allowed value  x000D   x000D  result   given reduce  acc  val    gt    x000D    return acc    allowed includes val  x000D     false  x000D   x000D  console log  given contains at least one allowed value    result  x000D   x000D   x000D

User · Answer

That should work even if one  and only one of the conditions is true    var str    bonjour le monde vive le javascript   var arr     bonjour   europe    c       function contains target  pattern       var value   0      pattern forEach function word         value   value   target includes word               return  value     1     console log contains str  arr

User · Answer

You can use the  some method referenced here   The some   method tests whether at least one element in the array passes the test implemented by the provided function    x000D   x000D     test cases var str1    hi  how do you do    var str2    regular string       do the test strings contain these terms  var conditions     hello    hi    howdy        run the tests against every element in the array var test1   conditions some el   gt  str1 includes el    var test2   conditions some el   gt  str2 includes el        display results console log str1        gt     test1   console log str2        gt     test2   x000D   x000D   x000D

User · Answer

How about   hello    hi    howdy   includes str

User · Answer

That can be done by using some every methods of Array and RegEx   To check whether ALL of words from list array  are present in the string   const multiSearchAnd    text  searchWords    gt      searchWords every  el    gt        return text match new RegExp el  i            multiSearchAnd  Chelsey Dietrich Engineer 2018-12-11 Hire     cle    hire      returns false multiSearchAnd  Chelsey Dietrich Engineer 2018-12-11 Hire     che    hire      returns true   To check whether ANY of words from list array  are present in the string   const multiSearchOr    text  searchWords    gt      searchWords some  el    gt        return text match new RegExp el  i            multiSearchOr  Chelsey Dietrich Engineer 2018-12-11 Hire     che    hire      returns true multiSearchOr  Chelsey Dietrich Engineer 2018-12-11 Hire     aaa    hire      returns true multiSearchOr  Chelsey Dietrich Engineer 2018-12-11 Hire     che    zzzz      returns true multiSearchOr  Chelsey Dietrich Engineer 2018-12-11 Hire     aaa    1111      returns false

User · Answer

Here s a controversial option   String prototype includesOneOf   function arrayOfStrings      if  Array isArray arrayOfStrings         throw new Error  includesOneOf only accepts an array         return arrayOfStrings some str   gt  this includes str       Allowing you to do things like    Hi  hope you like this option  toLowerCase   includesOneOf   hello    hi    howdy       True

User · Answer

Not the best answer and not the cleanest  but I think it s more permissive  Like if you want to use the same filters for all of your checks  Actually  filter   works with an array and return a filtered array  wich I find more easy to use too    var str1    hi  how do you do    var str2    regular string   var conditions     hello    hi    howdy        Solve the problem var res1    str1  filter data   gt  data includes conditions 0      data includes conditions 1      data includes conditions 2     var res2    str2  filter data   gt  data includes conditions 0      data includes conditions 1      data includes conditions 2      console log res1        hi  how do you do    console log res2              More useful in this case var text    str1  str2   hello world        Apply some filters on data var res3   text filter data   gt  data includes conditions 0    amp  amp  data includes conditions 2        You may use again the same filters for a different check var res4   text filter data   gt  data includes conditions 0      data includes conditions 1      console log res3         console log res4        hi  how do you do     hello world

User · Answer

With includes    no  but you can achieve the same thing with REGEX via test     var value    hello hi howdy  test str     Or  if the words are coming from a dynamic source   var words   array  hello    hi    howdy    var value   new RegExp words join       test str     The REGEX approach is a better idea because it allows you to match the words as actual words  not substrings of other words  You just need the word boundary marker  b  so   var str    hilly   var value   str includes  hi      true  even though the word  hi  isn t found var value     bhi b  test str     false -  hi  appears but not as its own word

User · Answer

You could also do something like this     x000D   x000D  const str    hi  there  x000D   x000D  const res   str includes  hello      str includes  hi      str includes  howdy    x000D   x000D  console log res   x000D   x000D   x000D    Whenever one of your includes return true  value will be true  otherwise  it s going to be false  This works perfectly fine with ES6

[javascript] multiple conditions for JavaScript .includes() method

Examples related to javascript

Examples related to methods