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Angular 7 iterate table

I want to iterate table with one property but to have 4 td in one row, and to continue like that till the end...
I want like this:
<table>
<tr>
<td>
<mat-checkbox>1</mat-checkbox>
</td>
<td>
<mat-checkbox>2</mat-checkbox>
</td>
<td>
<mat-checkbox>3</mat-checkbox>
</td>
<td>
<mat-checkbox>4</mat-checkbox>
</td>
</tr>
<tr>
<td>
<mat-checkbox>5</mat-checkbox>
</td>
<td>
<mat-checkbox>6</mat-checkbox>
</td>
<td>
<mat-checkbox>7</mat-checkbox>
</td>
</tr>
</table>
I tried like this, but it's al in one column :
lista = [
{ value: "1" },
{ value: "2" },
{ value: "3" },
{ value: "4" },
{ value: "5" },
{ value: "6" },
{ value: "7" },
<table *ngFor="let list of lista">
<tr>
<td>
<mat-checkbox>{{ list.value }}</mat-checkbox>
</td>
</tr>
</table>

You need to group your array firstly in groups of 4 (chunk size), then iterate over it simply in your template.
In your component:
const lista = [
{ value: "1" },
{ value: "2" },
{ value: "3" },
{ value: "4" },
{ value: "5" },
{ value: "6" },
{ value: "7" }
];
const chunkSize = 4;
// Group in chunks of 4 and take only truthy values
const groups = lista
.map((x, index) => {
return index % chunkSize === 0 ? lista.slice(index, index + chunkSize): null;
})
.filter(x => x);
In your template:
<table >
<tr *ngFor="let item of groups">
<td *ngFor = "let innerItem of item">
<mat-checkbox>{{ innerItem.value }}</mat-checkbox>
</td>
</tr>
</table>

you can use 2d array for your table like below:
lista = [
[
{value: '1'},
{value: '2'},
{value: '3'},
{value: '4'}
],
[
{value: '5'},
{value: '6'},
{value: '7'},
{value: '8'}
]
];
and for HTML
<table >
<tr *ngFor="let row of lista">
<td *ngFor="let col of row">
<mat-checkbox>{{ col.value }}</mat-checkbox>
</td>
</tr>
</table>

How to trigger selection of an option using Jquery [duplicate]

I am using Angular JS and I need to set a selected option of a dropdown list control using angular JS. Forgive me if this is ridiculous but I am new with Angular JS
Here is the dropdown list control of my html
<select ng-required="item.id==8 && item.quantity > 0" name="posterVariants"
ng-show="item.id==8" ng-model="item.selectedVariant"
ng-change="calculateServicesSubTotal(item)"
ng-options="v.name for v in variants | filter:{type:2}">
</select>
After it gets populated I get
<select ng-options="v.name for v in variants | filter:{type:2}" ng-change="calculateServicesSubTotal(item)"
ng-model="item.selectedVariant" ng-show="item.id==8" name="posterVariants"
ng-required="item.id==8 && item.quantity > 0" class="ng-pristine ng-valid ng-valid-required">
<option value="?" selected="selected"></option>
<option value="0">set of 6 traits</option>
<option value="1">5 complete sets</option>
</select>
How can I set the control for value="0" to be selected?

I hope I understand your question, but the ng-model directive creates a two-way binding between the selected item in the control and the value of item.selectedVariant. This means that changing item.selectedVariant in JavaScript, or changing the value in the control, updates the other. If item.selectedVariant has a value of 0, that item should get selected.
If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$scope.selectedOption = $scope.options[1];
HTML:
<select data-ng-options="o.name for o in options" data-ng-model="selectedOption"></select>
This would leave the "b" item to be selected.

I don't know if this will help anyone or not but as I was facing the same issue I thought of sharing how I got the solution.
You can use track by attribute in your ng-options.
Assume that you have:
variants:[{'id':0, name:'set of 6 traits'}, {'id':1, name:'5 complete sets'}]
You can mention your ng-options as:
ng-options="v.name for v in variants track by v.id"
Hope this helps someone in future.

If you assign value 0 to item.selectedVariant it should be selected automatically.
Check out sample on http://docs.angularjs.org/api/ng.directive:select which selects red color by default by simply assigning $scope.color='red'.

i see here already wrote good answers, but sometime to write the same in other form can be helpful
<div ng-app ng-controller="MyCtrl">
<select ng-model="referral.organization" ng-options="c for c in organizations"></select>
</div>
<script type='text/javascript'>
function MyCtrl($scope) {
$scope.organizations = ['a', 'b', 'c', 'd', 'e'];
$scope.referral = {
organization: $scope.organizations[2]
};
}
</script>

Simple way
If you have a Users as response or a Array/JSON you defined, First You need to set the selected value in controller, then you put the same model name in html. This example i wrote to explain in easiest way.
Simple example
Inside Controller:
$scope.Users = ["Suresh","Mahesh","Ramesh"];
$scope.selectedUser = $scope.Users[0];
Your HTML
<select data-ng-options="usr for usr in Users" data-ng-model="selectedUser">
</select>
complex example
Inside Controller:
$scope.JSON = {
"ResponseObject":
[{
"Name": "Suresh",
"userID": 1
},
{
"Name": "Mahesh",
"userID": 2
}]
};
$scope.selectedUser = $scope.JSON.ResponseObject[0];
Your HTML
<select data-ng-options="usr.Name for usr in JSON.ResponseObject" data-ng-model="selectedUser"></select>
<h3>You selected: {{selectedUser.Name}}</h3>

It can be usefull. Bindings dose not always work.
<select id="product" class="form-control" name="product" required
ng-model="issue.productId"
ng-change="getProductVersions()"
ng-options="p.id as p.shortName for p in products">
</select>
For example. You fill options list source model from rest-service. Selected value was known befor filling list and was set. After executing rest-request with $http list option be done. But selected option is not set. By unknown reasons AngularJS in shadow $digest executing not bind selected as it shuold be. I gotta use JQuery to set selected. It`s important! Angular in shadow add prefix to value of attr "value" for generated by ng-repeat optinos. For int it is "number:".
$scope.issue.productId = productId;
function activate() {
$http.get('/product/list')
.then(function (response) {
$scope.products = response.data;
if (productId) {
console.log("" + $("#product option").length);//for clarity
$timeout(function () {
console.log("" + $("#product option").length);//for clarity
$('#product').val('number:'+productId);
//$scope.issue.productId = productId;//not work at all
}, 200);
}
});
}

Try the following:
JS file
this.options = {
languages: [{language: 'English', lg:'en'}, {language:'German', lg:'de'}]
};
console.log(signinDetails.language);
HTML file
<div class="form-group col-sm-6">
<label>Preferred language</label>
<select class="form-control" name="right" ng-model="signinDetails.language" ng-init="signinDetails.language = options.languages[0]" ng-options="l as l.language for l in options.languages"><option></option>
</select>
</div>

This is the code what I used for the set selected value
countryList: any = [{ "value": "AF", "group": "A", "text": "Afghanistan"}, { "value": "AL", "group": "A", "text": "Albania"}, { "value": "DZ", "group": "A", "text": "Algeria"}, { "value": "AD", "group": "A", "text": "Andorra"}, { "value": "AO", "group": "A", "text": "Angola"}, { "value": "AR", "group": "A", "text": "Argentina"}, { "value": "AM", "group": "A", "text": "Armenia"}, { "value": "AW", "group": "A", "text": "Aruba"}, { "value": "AU", "group": "A", "text": "Australia"}, { "value": "AT", "group": "A", "text": "Austria"}, { "value": "AZ", "group": "A", "text": "Azerbaijan"}];
for (var j = 0; j < countryList.length; j++) {
//debugger
if (countryList[j].text == "Australia") {
console.log(countryList[j].text);
countryList[j].isSelected = 'selected';
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<label>Country</label>
<select class="custom-select col-12" id="Country" name="Country" >
<option value="0" selected>Choose...</option>
<option *ngFor="let country of countryList" value="{{country.text}}" selected="{{country.isSelected}}" > {{country.text}}</option>
</select>
try this on an angular framework

JS:
$scope.options = [
{
name: "a",
id: 1
},
{
name: "b",
id: 2
}
];
$scope.selectedOption = $scope.options[1];

How to bind 2nd dropdown based on 1st dropdown selection by picking item from associative array?

I am having associate array like below :
$scope.item=
{
"Item1": [
{
"title": "Item1",
"choices": [
"Egg",
"burger",
]
}
],
"Item2": [
{
"title": "Item2",
"choices": [
"Pizza",
"Rice",
]
}
]
}
});
I am having 2 dropdown like below :
Dropdown 1 : Displaying Item1 and Item2 i.e title from both the list of items
Dropdown 2 : Displaying choices depending upon item selection. For example, if user selected Item1 then in 2nd dropdown I will display Egg,burger.
But I don't want to take 1 extra scope variable for binding this choices in my second dropdown.
I would like to get it from my item variable only based on Item selection but I am not understanding how to do this.
Right now I have commented out code for second dropdown because I am not getting how to pick choices from item in ng-options.
Is this not possible to bind second dropdown by picking item from 1 scope variable?
var app = angular.module("myApp", []);
app.controller("MyController", function($scope) {
$scope.item = {
"Item1": [{
"title": "Item1",
"choices": ["Egg", "burger", ]
}],
"Item2": [{
"title": "Item2",
"choices": ["Pizza", "Rice", ]
}]
};
$scope.myItem = {
title: null,
choice: null
};
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<ul ng-app="myApp" ng-controller="MyController">
<select ng-model="myItem.title" ng-options="value[0].title as key for (key , value) in item">
<option value="">Select Items</option>
</select>
<!--<select ng-model="myItem.choice" ng-options="value[0] as key for (key , value) in item" >
<option value="">Select choice</option>
</select>-->{{myItem.title}} </ul>

You can bind the first ng-model as an input to the second ng-options to do this without introducing a new scope variable.
var app = angular.module("myApp", []);
app.controller("MyController", function($scope) {
$scope.item = {
"Item1": [{
"title": "Item1",
"choices": ["Egg", "burger", ]
}],
"Item2": [{
"title": "Item2",
"choices": ["Pizza", "Rice", ]
}]
};
$scope.myItem = {
title: null,
choice: null
};
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<ul ng-app="myApp" ng-controller="MyController">
<select ng-model="myItem.title" ng-options="key as key for (key , value) in item">
<option value="">Select Items</option>
</select>
<select ng-model="myItem.choice" ng-options="value as value for value in item[myItem.title][0].choices">
<option value="">Select choice</option>
</select> {{myItem.title}}{{myItem.choice}} </ul>

var app = angular.module("myApp", []);
app.controller("MyController", function($scope) {
$scope.item = {
"Item1": [{
"title": "Item1",
"choices": ["Egg", "burger", ]
}],
"Item2": [{
"title": "Item2",
"choices": ["Pizza", "Rice", ]
}]
};
$scope.myFunc = function() {
$scope.myItem.choices=$scope.item[$scope.myItem.title][0].choices;
};
$scope.myItem = {
title: null,
choices: null
};
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<ul ng-app="myApp" ng-controller="MyController">
<select ng-model="myItem.title" ng-change="myFunc()" ng-options="value[0].title as key for (key , value) in item">
<option value="">Select Items</option>
</select>
<select ng-model="myItem.choice" ng-options="x for x in myItem.choices" >
<option value="">Select choice</option>
</select>{{myItem.choices}} </ul>

Use groupBy on ng-repeat with angular-filter module

How can I use groupBy on ng-repeat with filter module ?
I have this :
<div ng-init="fields = session.getCountry()">
<span ng-repeat="(country, value) in fields | groupBy: 'country.code'" >
<span ng-bind="country.code"></span>
<span ng-bind="country.name"></span>
<span ng-if="$last === false">, </span>
</span>
</div>
session.getCountry() return this :
[
{
code: "1",
country: {
code: "au",
name: "Australia",
},
name: "Free"
},
{
code: "2",
country: {
code: "au",
name: "Australia",
},
name: "Pay"
},
{
code: "3",
country: {
code: "us",
name: "United States",
},
name: "Free"
},
]
I would like to have this :
au Australia, us united States
but my result is :
au fi mx
I use angular-filter v0.5.7
SOLVED
I use :
<div ng-init="fields = session.getCountry()">
<span ng-repeat="field in fields | unique: 'country.code'" >
<span ng-bind="field.country.code"></span>
<span ng-bind="field.country.code"></span>
<span ng-if="$last === false">, </span>
</span>
</div>

Try to write your ng-repeat like this :
<div ng-repeat="(key, value) in fields | groupBy:'country.code' ">

First thing, you should try to make your "country" items like this :
{
code: "1",
country: {
code: "au",
name: "Australia",
},
name: "Free"
},
Just change the "[" and "]" brackets.
Then you can just do this :
<span ng-repeat="field in fields | groupBy: 'field.country.code'" >
{{ field.country.code }}
Happy coding!

"selected" attribute on select option being ignored [duplicate]

I am using Angular JS and I need to set a selected option of a dropdown list control using angular JS. Forgive me if this is ridiculous but I am new with Angular JS
Here is the dropdown list control of my html
<select ng-required="item.id==8 && item.quantity > 0" name="posterVariants"
ng-show="item.id==8" ng-model="item.selectedVariant"
ng-change="calculateServicesSubTotal(item)"
ng-options="v.name for v in variants | filter:{type:2}">
</select>
After it gets populated I get
<select ng-options="v.name for v in variants | filter:{type:2}" ng-change="calculateServicesSubTotal(item)"
ng-model="item.selectedVariant" ng-show="item.id==8" name="posterVariants"
ng-required="item.id==8 && item.quantity > 0" class="ng-pristine ng-valid ng-valid-required">
<option value="?" selected="selected"></option>
<option value="0">set of 6 traits</option>
<option value="1">5 complete sets</option>
</select>
How can I set the control for value="0" to be selected?

I hope I understand your question, but the ng-model directive creates a two-way binding between the selected item in the control and the value of item.selectedVariant. This means that changing item.selectedVariant in JavaScript, or changing the value in the control, updates the other. If item.selectedVariant has a value of 0, that item should get selected.
If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$scope.selectedOption = $scope.options[1];
HTML:
<select data-ng-options="o.name for o in options" data-ng-model="selectedOption"></select>
This would leave the "b" item to be selected.

I don't know if this will help anyone or not but as I was facing the same issue I thought of sharing how I got the solution.
You can use track by attribute in your ng-options.
Assume that you have:
variants:[{'id':0, name:'set of 6 traits'}, {'id':1, name:'5 complete sets'}]
You can mention your ng-options as:
ng-options="v.name for v in variants track by v.id"
Hope this helps someone in future.

If you assign value 0 to item.selectedVariant it should be selected automatically.
Check out sample on http://docs.angularjs.org/api/ng.directive:select which selects red color by default by simply assigning $scope.color='red'.

i see here already wrote good answers, but sometime to write the same in other form can be helpful
<div ng-app ng-controller="MyCtrl">
<select ng-model="referral.organization" ng-options="c for c in organizations"></select>
</div>
<script type='text/javascript'>
function MyCtrl($scope) {
$scope.organizations = ['a', 'b', 'c', 'd', 'e'];
$scope.referral = {
organization: $scope.organizations[2]
};
}
</script>

Simple way
If you have a Users as response or a Array/JSON you defined, First You need to set the selected value in controller, then you put the same model name in html. This example i wrote to explain in easiest way.
Simple example
Inside Controller:
$scope.Users = ["Suresh","Mahesh","Ramesh"];
$scope.selectedUser = $scope.Users[0];
Your HTML
<select data-ng-options="usr for usr in Users" data-ng-model="selectedUser">
</select>
complex example
Inside Controller:
$scope.JSON = {
"ResponseObject":
[{
"Name": "Suresh",
"userID": 1
},
{
"Name": "Mahesh",
"userID": 2
}]
};
$scope.selectedUser = $scope.JSON.ResponseObject[0];
Your HTML
<select data-ng-options="usr.Name for usr in JSON.ResponseObject" data-ng-model="selectedUser"></select>
<h3>You selected: {{selectedUser.Name}}</h3>

It can be usefull. Bindings dose not always work.
<select id="product" class="form-control" name="product" required
ng-model="issue.productId"
ng-change="getProductVersions()"
ng-options="p.id as p.shortName for p in products">
</select>
For example. You fill options list source model from rest-service. Selected value was known befor filling list and was set. After executing rest-request with $http list option be done. But selected option is not set. By unknown reasons AngularJS in shadow $digest executing not bind selected as it shuold be. I gotta use JQuery to set selected. It`s important! Angular in shadow add prefix to value of attr "value" for generated by ng-repeat optinos. For int it is "number:".
$scope.issue.productId = productId;
function activate() {
$http.get('/product/list')
.then(function (response) {
$scope.products = response.data;
if (productId) {
console.log("" + $("#product option").length);//for clarity
$timeout(function () {
console.log("" + $("#product option").length);//for clarity
$('#product').val('number:'+productId);
//$scope.issue.productId = productId;//not work at all
}, 200);
}
});
}

Try the following:
JS file
this.options = {
languages: [{language: 'English', lg:'en'}, {language:'German', lg:'de'}]
};
console.log(signinDetails.language);
HTML file
<div class="form-group col-sm-6">
<label>Preferred language</label>
<select class="form-control" name="right" ng-model="signinDetails.language" ng-init="signinDetails.language = options.languages[0]" ng-options="l as l.language for l in options.languages"><option></option>
</select>
</div>

This is the code what I used for the set selected value
countryList: any = [{ "value": "AF", "group": "A", "text": "Afghanistan"}, { "value": "AL", "group": "A", "text": "Albania"}, { "value": "DZ", "group": "A", "text": "Algeria"}, { "value": "AD", "group": "A", "text": "Andorra"}, { "value": "AO", "group": "A", "text": "Angola"}, { "value": "AR", "group": "A", "text": "Argentina"}, { "value": "AM", "group": "A", "text": "Armenia"}, { "value": "AW", "group": "A", "text": "Aruba"}, { "value": "AU", "group": "A", "text": "Australia"}, { "value": "AT", "group": "A", "text": "Austria"}, { "value": "AZ", "group": "A", "text": "Azerbaijan"}];
for (var j = 0; j < countryList.length; j++) {
//debugger
if (countryList[j].text == "Australia") {
console.log(countryList[j].text);
countryList[j].isSelected = 'selected';
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<label>Country</label>
<select class="custom-select col-12" id="Country" name="Country" >
<option value="0" selected>Choose...</option>
<option *ngFor="let country of countryList" value="{{country.text}}" selected="{{country.isSelected}}" > {{country.text}}</option>
</select>
try this on an angular framework

JS:
$scope.options = [
{
name: "a",
id: 1
},
{
name: "b",
id: 2
}
];
$scope.selectedOption = $scope.options[1];