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I'm trying to define an async function with an arrow function. This code already throws an error, but I still want to know what the main error is.
async responseName = name => ('hello'+ name);
responseName('joshua').then(response => console.log(response));
You have a syntax error. You cannot define an identifier as async:
const responseName = async (name) => `hello ${name}`;
Related
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I am trying to get the following script to work but it throws:
Uncaught ReferenceError: ZSOuput_account is not defined.
function ZSOutput_account(AccID) {
var accvar = AccID;
var urlRequest = 'https://1591725587001.contifico.com/sistema/reportes/cuentas/?pagina=1&cuenta=' + accvar + '&fecha_inicio=01/01/2022&fecha_fin=31/12/2022';
window.location.replace(urlRequest);
javascript:exportarExcel();
}
ZSOuput_account(2583907);
ZSOuput_account(2738049);
You are calling in a wrong way the function, it´s missing a ´t´ in your call
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I am trying to assign an IF statement inside a map function but it asks for a return. If I put the return, in front of the IF, does not work. Currently getting the following error on Lint: Line 78:52: Array.prototype.map() expects a return value from arrow function array-callback-return
I expect just to push objects into the array.
What is the correct way to assign the IF inside a map?
{ ingredientIndex.map((currentIndex) => {
const ingredient = detail[`strIngredient${currentIndex}`];
const measure = detail[`strMeasure${currentIndex}`];
if (ingredient) {
validIngredients.push(`${ingredient} - ${measure}`);
}
}) }
ingredientIndex.forEach(currentIndex => {
^^^^^^^
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Closed 3 years ago.
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Question: Two Functions Return Different Data But After Calling Both Functions Receive Output From Last Function. Why?
javascript
var printStudentInfo = function () {
return 'Name';
}
var printStudentTerritory = function () {
return 'Age';
}
printStudentInfo();
printStudentTerritory();
To put it simply, Here's what printStudentInfo(); printStudentTerritory(); suggest let someVariable = printStudentInfo(); printStudentTerritory(); Since the last function returns 'age'. Your variable is assigned to 'age'
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Is it possible to write this if statement in JS without using arrow syntax?
// Arrow Syntax
if (!filters.some(e => e.label === filter_object.label))
{
// Do Something
}
// ? Not working...
if (!filters.some(function(e) { e.label === filter_object.label }))
{
// Do something
}
You need a return statement, because it is a classic function which returns undefined, if no different value is specified.
if (!filters.some(function(e) { return e.label === filter_object.label; })
// ^^^^^^
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Closed 8 years ago.
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I have created the mapWith function like this:
var mapWith=function(fn)
{
return funtion(list)
{
return Array.prototype.map.call(list,function(something){
return fn.call(this,something);
});
}
};
I use it on a function and an array:
var insertLatLong=function(obj)
{
//inserts to db...
}
var inception_cities=[{lat:35.0117,lng:135.7683},
{lat:48.8567,lng:2.3508},
{lat:-4.0500,lng:39.6667},
{lat:33.8600,lng:151.2111},
{lat:34.0500,lng:118.2500}];
var insertLocations=mapWith(insertLatLong);
insertLocations(inception_cities);
The error I get looks like this:
ReferenceError: list is not defined
at mapWith (/home/anr/Desktop/node js/mysql.js:11:17)
at Object.<anonymous> (/home/anr/Desktop/node js/mysql.js:40:21)
The error is caused because there's c missing in return funtion(list). Without it JavaScript thinks that you want to call something with name funtion. But you also want to pass list to it and since arguments are evaluated first then you get ReferenceError: it does not know what list is.