can't convert string to int angular4

Question

I'm using bootstrap 4 with Angular 2 and have the following select:

<div class="form-group">
    <label for="isActived" class="col-sm-4 control-label">Add BY</label>
    <div class="col-sm-16">
        <ng-container *ngFor="let user of users">
            <select class="custom-select" *ngIf="user.name == test" name="State" required
                [(ngModel)]="model.isActived" #isActived="ngModel">
                <option selected value="0">{{test}}</option>
            </select>
        </ng-container>
    </div>
</div>

My first question is when i use this selected i can't get it as default

my second one is how i can convert the value of test to integer i get this error: "message": "SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect integer value: i use the parseInt() and many solution but i still have the same error

getAllUsers() {
    this.userService
        .showAllUsers()
        .subscribe(users => {
            this.users = users;
            let userData = localStorage.getItem('currentUser');

            if (!userData) return null;

            let userrData = JSON.parse(userData);
            var jwt = require('jsonwebtoken');
            const tokenPayload = decode(userrData.token, {complete: true});

            for (let user of users) {
                if (tokenPayload.sub == user.id) {
                    parseInt(this.test = user.name);
                }
            }
        });
}

so can i get some help

If user.name is a string but you want it to be a number, you can use the syntax this.test = +user.name to convert it to a number. If you want to use parseInt(..), you need to swap your code to this.test = parseInt(user.name, 10) — Daniel W Strimpel
– Daniel W Strimpel, Commented Apr 25, 2018 at 23:07
That would be because user.name is not a number. developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Daniel W Strimpel
– Daniel W Strimpel, Commented Apr 25, 2018 at 23:19
The contents of the string are not a number. If it was a number it would return a number after parsing. Are you sure user.name is the property that you want to convert to a number? — Daniel W Strimpel
– Daniel W Strimpel, Commented Apr 25, 2018 at 23:23

Abel Valdez · Accepted Answer · 2018-04-26 00:03:21Z

1

I use this function (Number) to convert a string to a number.

Example:

let value = Number(item.someString);

answered Apr 26, 2018 at 0:03

Abel Valdez

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