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I have this file upload.js which contains this:
var app = app | {};
(function(o){
"use strict";
//Private methods
var ajax, getFormData, setProgress;
ajax = function(data){
var xmlhttp = new XMLHttpRequest(), uploaded;
xmlhttp.open('post', o.options.processor);
xmlhttp.send(data);
};
getFormData = function(source){
};
setProgress = function(value){
};
o.uploader = function(options){
o.options = options;
if(o.options.files !== undefined){
ajax({});
}
}
})(app);
and I have this in my upload.php:
<script type="javascript/text" src="<? echo APP_ROOT; ?>public/js/upload.js"></script>
<script>
var pathname = window.location.protocol + "//" + window.location.host + "/";
document.getElementById('submit').addEventListener('click', function(e){
e.preventDefault();
var f = document.getElementById('file'),
pb = document.getElementById('pb'),
pt = document.getElementById('pt');
app.uploader({
files: f,
progressBar: pb,
progressText: pt,
processor: pathname,
finished: function(data){
console.log(data);
},
error: function(){
console.log('Not working!');
}
});
});
</script>
and every time I click on the submit button I get this javascript error in my console ReferenceError: app is not defined what is wrong with it ? Please help.
Change the Pipe sign to logical OR operator sign instead of using a Bitwise OR operator. (as per suggestion/correction by pid)
var app = app || {};
It would fix it.
In javascript, the || works like coalesce.
If the first term (term before ||) is falsy, the assignment is given to the second term (term after ||).
The | is bitwise or in js.
|| is also short circuit or operator as it is in many other languages.
Related
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I am running the following JavaScript code:
// Return true if the given username and password are in the database,
// false otherwise.
function validCredentials(enteredUsername, enteredPassword) {
// Database of usernames and passwords
let usernames = ["smith", "tron", "ace", "ladyj", "anon"];
let passwords = ["qwerty", "EndOfLine", "year1942", "ladyj123", "PASSWORD"];
// Search the usernames array for enteredUsername
// Only return true if the enteredUsername is in username, and the
// same location in passwords is enteredPassword
if (usernames.includes(enteredUsername)){
var correctPassword = passwords[usernames.indexOf(enteredUsername)];
if(enteredPassword == correctPassword){
return true;
}
}
else {
return false;
}
}
console.log("Login for ladyj: " + validCredentials("ladyj", "ladyj123")); // true
console.log("Login for ace: " + validCredentials("ace", "wrong")); // false
console.log("Login for jake: " + validCredentials("jake", "???")); // false
I am expecting console.log("Login for ace: " + validCredentials("ace", "wrong")); return false, but it returned undefined. Can anyone tell me what went wrong?
You don't return in all possible branches (namely, if the username exists, but the password is incorrect). Move the return false outside the else to be the final statement in the function.
Alternatively, you could simplify the chain of if and else into one statement:
return usernames.includes(enteredUsername) &&
passwords[usernames.indexOf(enteredUsername)] === enteredPassword;
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In the code below, I've defined a function called checkPassword(), which takes in a single argument, passwordCorrect, which will be either true or false.
I've also defined two variables, accessGranted and message, which currently have no values (they're undefined) and will be overwritten and defined by your if statement if you've written it correctly.
I need to write an if statement inside the function that updates the two variables, accessGranted (a boolean), and message (a string), to meet the requirements below
Requirements:
1) If passwordCorrect is true, accessGranted should have a value of true and message should have a value of 'Welcome to the admin panel!'
2) In any other case, accessGranted should have a value of false and message should have a value of 'Wrong password.'
var accessGranted;
var message;
function checkPassword(passwordCorrect) {
if passwordCorrect == true {
accessGranted = true;
message = "Welcome to the admin panel!";
}
else {
accessGranted = false;
message = "Wrong password."
}
}
console.log('Access Granted:', accessGranted);
console.log('Message:', message);
You need to call the function and fix your syntax error. If statements need parentheses in javascript.
let accessGranted;
let message;
function checkPassword(passwordCorrect) {
if (passwordCorrect) {
accessGranted = true;
message = "Welcome to the admin panel!";
}
else {
accessGranted = false;
message = "Wrong password."
}
}
checkPassword(true)
console.log('Access Granted:', accessGranted);
console.log('Message:', message);
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I am using await to pull data from the database. There's a variable secuity_ok that is true on one line, and then false on the next. Can anyone see what the issue is?
Note – if I comment out the line: let session = ..., then it all works.
Controller.prototype.changePassword = async function(request, response) {
let model = request.body;
var secuity_ok = false;
var user = await userService.getUserByEmail(model.email);
if (user && this.isAuthenticatedUser(request, user.id)) {
secuity_ok = true;
} else {
let session = await authenticationService.createSessionByEmailPassword(model.email, model.oldpassword),
secuity_ok = !!session;
console.log( 'A', secuity_ok ); // true
}
console.log( 'B', secuity_ok ); // false
if (!secuity_ok) {
this.sendForbiddenError(response, {
error: 'Cannot change password: Application safeguards are preventing this action'
});
return new Promise(() => {});
}
...
}
Output:
A true
B false
Output should be:
A true
B true
You have a comma at the end of the first line here:
let session = await authenticationService.createSessionByEmailPassword(model.email, model.oldpassword), // <--- Note comma here
secuity_ok = !!session;
That makes secuity_ok part of the let statement, so it's an extra, inner declaration of secuity_ok that only has scope inside the parentheses of the else clause.
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Cannot read property 'result' of undefined
Angular Function :
.controller('forgotCtrl', function($scope,$http,$ionicPopup,$state,$ionicHistory) {
$scope.forgot=function(data1){
var link1 = 'http://localhost/uxo_data/forgot.php';
var json10 = {n : data1.mobile };
$http.post(link1, { data1: json10 })
.then(function (res){
$scope.response = res.data1.result;
console.log(res.data1.result);
if($scope.response.created=="1"){
$scope.title="Password Reset!";
$scope.template="Please Check your associated Email Account!";
//no back option
$ionicHistory.nextViewOptions({
disableAnimate: true,
disableBack: true
});
$state.go('login', {}, {location: "replace", reload: true});
}else if($scope.response.exists=="1"){
$scope.title="Failed";
$scope.template="Number you entered doesn't exist";
}else{
$scope.title="Failed";
$scope.template="Contact Our Technical Team";
}
var alertPopup = $ionicPopup.alert({
title: $scope.title,
template: $scope.template
});
});
}
})
Output i get from rest-api is :
{"result":{"created": "0" , "exists": "1" }}
I Checked in Web Debugging tool, php code is working fine and giving above response as output.
change this line from
$scope.response = res.data1.result;
to
$scope.response = res.data.result;
The response will have a data object which you are accessing incorrectly.
console.log(res.data1.result); // => data1 is undefined
try below code:
console.log(res.data.result);
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phantom = require 'phantom'
phantom.create (ph) ->
ph.createPage (page) ->
page.open "http://www.google.com", (status) ->
console.log "opened google? ", status
page.evaluate (-> document.title), (result) ->
console.log 'Page title is ' + result
ph.exit()
I tried using this website but it doesn't seem to be very accurate. It has returns everywhere. http://js2coffee.org/#coffee2js
Update: After a second look, it does seem that some of these returns are spurious/redundant. That is because Coffeescript just always returns the result of the last statement in the function (so that you can save the return keyword), even in cases where you would not have returned anything in Javascript (the compiler cannot know your intention here). That may be unnecessary, but there is also no harm in it, if no one was using the return value anyway. If it is somehow important to return "nothing", you'd can explicitly do that, too.
You can just compile it, to see what it results in:
var phantom;
phantom = require('phantom');
phantom.create(function(ph) {
return ph.createPage(function(page) {
return page.open("http://www.google.com", function(status) {
console.log("opened google? ", status);
return page.evaluate((function() {
return document.title;
}), function(result) {
console.log('Page title is ' + result);
return ph.exit();
});
});
});
});
It has returns everywhere.
Well, every function you define there has one return.
One of the prime motivators for Coffeescript is to be able to write all those callback functions with less boilerplate.
Either way, the compiler is "accurate".
var phantom = require('phantom');
phantom.create(function(ph)) {
ph.createPage(function(page) {
page.open("http://www.google.com", function(status) {
console.log("opened google? ", status);
page.evaluate(function() { return document.title; }, function() {
console.log('Page title is ' + result);
ph.exit()
}
});
});
});