Javascript：删除字符串之间的空格，除了一个

Question

There are two fields on one page (first name and last name) and one field on another page (org legal name). When the user types in the org legal name field I am checking whether the first name, last name, or a concatenation of the two matched what they are typing for the org legal name .

My concern is about the concatenation. Right now it is only testing the concatenation if there is one space between the names (ie. John Smith). But what if the user types multiple spaces in between by mistake?

I wrote the below method that attempts to match a first name, last name, or a concatenation of first and last names. It works but the problem is that it will only match the concatenation if there is one space between the strings. I need it to match in case the user mistakenly types multiple spaces between their first and last name?

validateFirstAndLastNameMatch() {
    const prospect = this.prospectService.getProspect();
    const firstName = prospect.prospectQuoteDto.firstName.toUpperCase();
    const lastName = prospect.prospectQuoteDto.lastName.toUpperCase();
    const orgLegalName = this.form.get('orgLegalName').value.trim().toUpperCase();
    if (firstName === orgLegalName || lastName === orgLegalName || firstName + " " + lastName === orgLegalName) {
      this.isMatchOnName = true;
    } else {
      this.isMatchOnName = false;
    }    
  }

Answer 1

You could use a regular expression:

 const nameRegexp = /(\\w+)(?:\\s+(\\w+))?/; console.log( 'joe'.match(nameRegexp), 'joe schmoe'.match(nameRegexp), ' joe schmoe '.match(nameRegexp) ); 

Here's a breakdown of the regexp:

(\\w+) - Match one or more letters for the first name.

(?:\\s+(\\w+))? - Optionally look for one or more spaces followed by one or more letters and match just the letters for the last name.

Answer 2

If I'm understanding your question properly, you can just trim the firstName and lastName before comparing them to orgLegalName

validateFirstAndLastNameMatch() {
const prospect = this.prospectService.getProspect();
const firstName = prospect.prospectQuoteDto.firstName.toUpperCase().trim();
const lastName = prospect.prospectQuoteDto.lastName.toUpperCase().trim();
const orgLegalName = this.form.get('orgLegalName').value.trim().toUpperCase();
if (firstName  === orgLegalName || lastName === orgLegalName || firstName + " " + lastName === orgLegalName) {
  this.isMatchOnName = true;
} else {
  this.isMatchOnName = false;
}    

}

Answer 3

Match first name and last name combination, allow multiple spaces in between, ignore case.

const pattern = new RegExp(firstName +"[ ]+" + lastName, "i");
const isLegal = pattern.test(orgLegalName);