比较和索引Javascript数组中的正则表达式

Question

I have two arrays:

enteredCommands = ["valid", "this", 1.1];
validParameters = [/valid/, /alsoValid/, /this|that/, /\d+(\.)?\d*/];

I want to loop through all of the enteredCommands , if it exists in validParameters remove it from validParameters , if it doesn't, break.

I don't know how to compare the regex in this way, if I change validParameters to:

validParameters = ["valid", "alsoValid", /this|that/, /\\d+(\\.)?\\d*/];

and use:

var ok2go = true;
// For each entered command...
for (var i = 0; i < commands.length; i++) {
     // Check to see that it is a valid parameter
     if (validParameters.indexOf(commands[i]) === -1) {
         // If not, an invalid command was entered.
         ok2go = false;
         break;
     // If valid, remove from list of valid parameters so as to prevent duplicates.
     } else {
         validParameters.splice(validParameters.indexOf(commands[i]), 1);
     }
     return ok2go;
}

if (ok2go) {
   // do stuff if all the commands are valid
} else {
   alert("Invalid command");
}

It works the way I want it to for the strings, but obviously not for those values that need to be regex. Is there any way to solve this?

Test cases:

enteredCommands = ["valid", "this", 1.1, 3];
// Expected Result: ok2go = false because 2 digits were entered

enteredCommands = ["valid", "alsoValid", "x"];
// Expected Result: ok2go = false because x was entered

enteredCommands = ["valid", "alsoValid", 1];
// Expected Result: ok2go = true because no invalid commands were found so we can continue on with the rest of the code

Answer 1

You could filter the given commands and if a regular expression match, the exclude it from the regex array. Return only commants which does not match with the rest of the regex array.

 function check(array) { var regex = [/valid/, /alsoValid/, /this|that/, /\\d+(\\.)?\\d*/]; return array.filter(function (a) { var invalid = true; regex = regex.filter(function (r) { if (!r.test(a)) { return true; } invalid = false; }); invalid && alert('invalid command: ' + a); return invalid; }); } console.log(check(["valid", "this", 1.1, 3])); // 2 digits were entered console.log(check(["valid", "alsoValid", "x"])); // x was entered console.log(check(["valid", "alsoValid", 1])); // nothing, no invalid commands were found 

Answer 2

I recommend you split up the checks for a matching regex and the check for a matching string.

Conceptually, you might want to do the following (code not tested)

var validStringParameters = ["valid", "alsoValid"];
var validRegexMatches = [/valid/, /alsoValid/, /this|that/, /\d+(\.)?\d*/];

var validCommands = enteredcommands.filter(function(command){
if (validStringParameters.indexOf(command) !== -1){
return true;
}
for (var i = 0; i < validRegexMatches.length; i++){
if (command.test(validRegexMatches[i]){
return true;
})
return false;
}
})