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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.
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Closed 5 days ago.
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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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Closed 12 months ago.
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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 2 years ago.
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I was under the impression that the method push works for arrays, not objects... But then why does the following snippet work?
this.usersByMovie = {};
profiles.forEach(profile => {
const movieID = profile.favoriteMovieID;
if (this.usersByMovie[movieID]) {
// the object property is just being accessed using the square brackets
// so `this.usersByMovie` is still an object, not an array
// but why is the `push` method working on this object?
this.usersByMovie[movieID].push(profile.userID);
}
else {
this.usersByMovie[movieID] = [profile.userID];
}
});
this.usersByMovie[id] is actually an array, while this.usersByMovie is an object.
this.usersByMovie[movieID] = [profile.userID];
This line of codes makes this.usersByMovie[id] as an array.
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Closed 2 years ago.
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Receiving the following error:
Uncaught SyntaxError: Unexpected identifier
The error states it is on this code line:
let whosUp = document.querySelector(#whosUp);
What is the unexpected identifier? Am I missing something? My complete function is below. I can include my entire file if necessary.
function whosUpFunc(){
let whosUp = document.querySelector(#whosUp);
if (gameOver === true){
whosUp.innerHTML = ""
}
else {whosUp.innerHTML = `Player ${currPlayer}'s turn`
};
}
The function document.querySelector expects a string as an argument. You're passing it #whosUp, which is triggering the SyntaxError.
let whosUp = document.querySelector(#whosUp);
Should be
let whosUp = document.getElementById('whosUp');
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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'