Filter Array that contains specific symbol or words in Javascript

Question

Hello I would like to ask for help on filtering my Array currently I have a list of array that contains words but I want to filter out those with symbol ("#") to be remove on the array

function InitializeV3() {
    var req = SymbolList; //obj with symbol property
    for (var i = 0; i < req.lenght; i++) {
        if (req[i].smybol.includes("#")) {
            req.splice(req[i], 1);
        }
    }
    console.log(req);
};

Answer 1

First of all - req array should contain objects (current syntax is incorrect):

var req = [
 { symbol: 'test' },
 { symbol: '#test1' },
 // ...
];

Then you can try with:

const filteredReq = req.filter(item => item.symbol.indexOf('#') === -1);

Answer 2

For a simple array you can do it like this with the filter method:

 var req = ['test','#test1','#test2','test3','test4']; var result = req.filter(item => !item.includes("#")); console.log(result); 

And if you have an array of objects:

 var req = [{symbol: 'test'},{symbol: '#test1'},{symbol: '#test2'},{symbol: 'test3'},{symbol: 'test4'}] var result = req.filter(item => !item.symbol.includes('#')); console.log(result); 

Answer 3

 function InitializeV3() { // For simple array var req = ['test', '#test1', '#test2', 'test3', 'test4' ] var filtered = req.filter(item => !item.includes('#')) console.log(filtered) }; InitializeV3(); // For array of objects var req = [{ symbol: 'test' }, { symbol: '#test1' }, { symbol: '#test2' }, { symbol: 'test3' }, { symbol: 'test4' }] // Use the following var filtered = req.filter(item => !item.symbol.includes('#')) console.log(filtered) 

Answer 4

You can loop over all the keys. But if you have symbol multiple times as key only the last data will be saved.

 let SymbolList = { symbol0:'test', symbol1:'#test1', symbol2: '#test2', symbol3:'test3', symbol4: 'test4' }; function InitializeQuotesV3(req) { for (key in req) { req[key] = req[key].replace(/#/g,""); } return req; }; console.log(InitializeQuotesV3(SymbolList)); 

Answer 5

Better you can use JS Regex Regex

    var req = [{symbol:'test'} ,
           {symbol:'#test1'},
           {symbol: '#test2'}, 
           {symbol:'test3'} ,
           {symbol: 'test4'}];
          let hasHash = /#/;
        for (var i = req.length - 1; i >= 0; i--) {
            if (hasHash.test(req[i].symbol)) {
                req.splice(i,1); 
            }
        }
        console.log(req);