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Javascript 2021-09-11 00:46:02
angular implementing Validator
<>Copyimport {AbstractControl, ValidatorFn} from '@angular/forms'; export function blue(): ValidatorFn { return (control: AbstractControl): { [key: string]: any } | null => control.value?.toLowerCase() === 'blue' ? n... Add solution -
TypeScript 2021-09-08 21:25:04
check if username exists in database django
class FormClass: username = ... def clean(self): super(FormClass, self).clean() username = self.cleaned_data['username'] if User.objects.exclude(pk=self.instance.pk).filter(username=username).exists(): raise forms.ValidationError(f'... Add solution -
Other 2021-09-08 13:53:02
java
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let application developers write once, run anywhere (WORA),[17] m... Add solution -
Kotlin 2021-09-07 16:39:02
for loop in kotlin with index
val array = arrayOf(1, 3, 9) for (item in array) { //loops items } for (index in 0..array.size - 1) { //loops all indices } for (index in 0 untill array.size) { //loops all indices } for (index in array.indices) { //loops all indices (perform... Add solution -
Javascript 2021-09-07 10:40:01
Can't bind to 'formGroup' since it isn't a known property of 'form'
mport { BrowserModule } from '@angular/platform-browser'; import { FormsModule, ReactiveFormsModule } from '@angular/forms'; import { AppComponent } from './app.component'; @NgModule({ imports: [ BrowserModule, FormsModule, R... Add solution