angular find substring in array - arrays

Question

I have an array like this in angular
app.myStringArray=
[ 'abcdefg',
'123456',
'qwerty'
];
Currently I have a common method that checks for value being in array like this
app.factory('commons', function () {
var commons= {};
//Checks if the current url is
commons.checkString= function (str) {
if (app.myStringArray.indexOf(str) > -1) {
return true; //current string is in list
} else {
return false;
}
}
return commons;
}
);
This works if I send in the full string 'abcdefg' or '123456' or 'qwerty'.
How can I make it work even if I get part of the string like for eg: 'bcd' ?

Answer 1

To check if a string contains another one you can use String.indexOf() or as of ES6 String.includes().
To check if at least one item in an array matches a predicate you can use Array.some() or simply iterate over the array yourself.
ES6 solution:
function checkString(str) {
return myStringArray.some(s => s.includes(str));
}
ES5 solution:
function checkString2(str) {
return myStringArray.some(function(s) {
return s.indexOf(str) > -1;
});
}

Answer 2

Iterate through the array and check indexOf(str) for each string in the array. No need for Angular.
var array = ['abcdefg', '123456', 'qwerty'];
function checkString(str) {
for (var i = 0; i < array.length; i++) {
if (array[i].indexOf(str) > -1) {
return true;
}
}
return false;
}
alert(checkString("bcd"));