Can't get Regular Expressions to work

JavaScript
1

any idea why ?


   function replaceLettersWithDashes (x)
   {
     
   
     var array1 = x.split('')
     var array2 = []
   
     
   
     for(i=0;i<array1.length;i++)
     {
       if(x[i]===/\p/)
       {
         array2.push('');
       }
     
       
       else if(x[i]=== /\W/)
       {
         array2.push(x[i])
       }

   
       else if (x[i]=== /\w/)
       {
         array2.push('-')
       }

       else
       {  
          array2.push('-')
       }

      
   
      }
   
    console.log(array2)
   
    var answer =  array2.join('')
   
    
   
    return answer;
   
     
}


replaceLettersWithDashes ('@ ~')
  
      ```
3

I want it to replace alphabetic letter with dashes, everything else should return as is

5

Im just concerned as to why the regular expressions dont seem to be working?

7

Unsure whats going on here, the num ‘073’ is being read as ‘59’ . Not sure if this is the only thing wrong.

image
image1022×177 13 KB

function validMobileNumber (num) {
  
 
  console.log(num);
  console.log(typeof num)

  if (/^07[0-9]{9}/.test(num)===true)
  {
    return true;
  }

  if(/^\+447[0-9]{9}/.test(num)===true )
  {
    return true;
  }

  if(/^00447[0-9]{9}/.test(num)===true)
  {
   return true
  }

 return false;
}
9

Im testing the string ‘0750617250638’ against

image

Else it returns false, not sure whats up

image

11 
function validMobileNumber (num) {
  
 num = String(num);
  console.log(num);
  console.log(typeof num)

  if (/^07[0-9]{9}/.test(num)===true || /^\+447[0-9]{9}/.test(num)===true ||/^00447[0-9]{9}/.test(num)===true)
  {
    return true;
  }

  if(/^\+447[0-9]{9}/.test(num)===true )
  {
    return true;
  }

  if(/^00447[0-9]{9}/.test(num)===true)
  {
   return true
  }

 return false;
}


validMobileNumber('0750617250638')

This is what I am testing this against

escribe('validMobileNumber', function () {
  it('returns false when passed a string of the wrong length', function () {
    expect(validMobileNumber('123')).to.equal(false);
    expect(validMobileNumber('0750617250638')).to.equal(false);
    expect(validMobileNumber('+447712368768724988')).to.equal(false);
  });
  it('returns true when passed a string of "07506172506"', function () {
    expect(validMobileNumber('07506172506')).to.equal(true);
  });
  it('returns true when passed a string of "+447506172506"', function () {
    expect(validMobileNumber('+447506172506')).to.equal(true);
  });
  it('returns true when passed a string of "00447506172506"', function () {
    expect(validMobileNumber('00447506172506')).to.equal(true);
  });
  it('returns false when passed a string of "07506189foo"', function () {
    expect(validMobileNumber('07506189foo')).to.equal(false);
  });
  it('returns false when passed a string of "00447506189foo"', function () {
    expect(validMobileNumber('00447506189foo')).to.equal(false);
  });
  it('returns false when passed a string of "+447506189foo"', function () {
    expect(validMobileNumber('+447506189foo')).to.equal(false);
  });
  it('returns true when passed random other valid phone numbers', function () {
    expect(validMobileNumber('00447555123456')).to.equal(true);
    expect(validMobileNumber('+447676111222')).to.equal(true);
    expect(validMobileNumber('07898888643')).to.equal(true);
    expect(validMobileNumber('07766555432')).to.equal(true);
    expect(validMobileNumber('07989765490')).to.equal(true);
  });
  it('returns false when passed random other invalid phone numbers', function () {
    expect(validMobileNumber('004475551&&&23456')).to.equal(false);
    expect(validMobileNumber('-447676111222')).to.equal(false);
    expect(validMobileNumber('09898888643')).to.equal(false);
    expect(validMobileNumber('+449166555432')).to.equal(false);
    expect(validMobileNumber('00448989765493')).to.equal(false);
    expect(validMobileNumber('cats')).to.equal(false);
  });
});
14

aaaaah so its testing for 9 or more rather than exactly 9 ok

16

oh so like \b to end it Ill check it out

^07[0-9]{9}\b
17

That is not the one I was thinking about, but it should work also.

18

Thanks!

image