Develop Reference

iterate arrays with forEach Loop

in this project there are 3 files, index.html, helper.js and resumeBuilder.js. The last one is the file I work with all the time.
My problem in this project is that I can't figure how to make images array,which is inside the projects array to display in my Resume, and the same for the onLineCourses array which is inside the schools array. This online school needs to make all arrays with
forEach loop. please if someone can help to write the code I have to write to make it display, I am searching for a week and can't figure it out!
resumeBuilder.js
var projects = {
"projects" : [
{
"title":"",
"location":"",
"dates":"",
"description":"",
},
{
"title":"",
"location":"",
"dates":"",
"description":"",
>
> "images":["", ""]
}
],
};
//projects function
projects.display = function(){
$.each(projects.projects, function(i){
$("#projects").append(HTMLprojectStart);
var myProjects = projects.projects[i];
var formattedTitle = HTMLprojectTitle.replace("%data%", myProjects.title);
$(".project-entry:last").append(formattedTitle);
var formattedDates = HTMLprojectDates.replace("%data%", myProjects.dates);
$(".project-entry:last").append(formattedDates);
var formattedDescription = HTMLprojectDescription.replace("%data%", myProjects.description);
$(".project-entry:last").append(formattedDescription);
> //image array here!
> var formattedImage = HTMLprojectImage.replace("%data%",projects.images);
> $("#projects").append(HTMLprojectStart);
> $(".project-entry:last").append(formattedImage);
});
};
projects.display();
> var education = {
"schools": [
{
"name" : "",
"location" : "",
"degree":",
"majors":["","",""],
"dates" : "2",
"url" : ""
},
{
"name" : "",
"location" :"",
"degree":"",
"majors":[""],
"dates" : "",
"url" : ""
}
],
//create onLine Courses
> "onlineCourses" : [
> {
> "title" : "",
> "school" : "",
> "dates" : "",
> "url" : ""
> } ] };
//education function
education.display = function(){
$.each(education.schools, function(i) {
var mySchools = education.schools[i];
$("#education").append(HTMLschoolStart);
var formattedName = HTMLschoolName.replace("%data%",mySchools.name);
var formattedDegree = HTMLschoolDegree.replace("%data%",mySchools.degree);
var formattedNameDegree = formattedName + formattedDegree;
$(".education-entry:last").append(formattedNameDegree);
var formattedDates = HTMLschoolDates.replace("%data%",mySchools.dates);
$(".education-entry:last").append(formattedDates);
var formattedLocation = HTMLschoolLocation.replace("%data%",mySchools.location);
$(".education-entry:last").append(formattedLocation);
var formattedMajor = HTMLschoolMajor.replace("%data%",mySchools.majors);
$(".education-entry:last").append(formattedMajor);
});
//onLine courses here
> $("#education").append(HTMLonlineClasses);
> $("#education").append(HTMLschoolStart); var courses =
> education.onlineCourses; var formattedTitle =
> HTMLonlineTitle.replace("%data%", courses.title); var
> formattedSchool = HTMLonlineSchool.replace("%data%",courses.name);
> var formattedDates = HTMLonlineDates.replace("%data%", courses.dates);
> var formattedOnline = formattedTitle + formattedSchool +
> formattedDates;
> $(".education-entry:last").append(formattedOnline);
>
> };
>
> education.display();
helper.js
> /*
This file contains all of the code running in the background that makes resumeBuilder.js possible. We call these helper functions because they support your code in this course.
Don't worry, you'll learn what's going on in this file throughout the course. You won't need to make any changes to it until you start experimenting with inserting a Google Map in Problem Set 3.
/*
These are HTML strings. As part of the course, you'll be using JavaScript functions
replace the %data% placeholder text you see in them.
*/
var HTMLheaderName = '<h1 id="name">%data%</h1>';
var HTMLheaderRole = '<span>%data%</span><hr>';
var HTMLcontactGeneric = '<li class="flex-item"><span class="orange-text">%contact%</span><span class="white-text">%data%</span></li>';
var HTMLmobile = '<li class="flex-item"><span class="orange-text">mobile</span><span class="white-text">%data%</span></li>';
var HTMLemail = '<li class="flex-item"><span class="orange-text">email</span><span class="white-text">%data%</span></li>';
var HTMLtwitter = '<li class="flex-item"><span class="orange-text">twitter</span><span class="white-text">%data%</span></li>';
var HTMLgithub = '<li class="flex-item"><span class="orange-text">github</span><span class="white-text">%data%</span></li>';
var HTMLblog = '<li class="flex-item"><span class="orange-text">blog</span><span class="white-text">%data%</span></li>';
var HTMLlocation = '<li class="flex-item"><span class="orange-text">location</span><span class="white-text">%data%</span></li>';
var HTMLbioPic = '<img src="%data%" class="biopic">';
var HTMLwelcomeMsg = '<span class="welcome-message">%data%</span>';
var HTMLskillsStart = '<h3 id="skills-h3">Skills at a Glance:</h3><ul id="skills" class="flex-column"></ul>';
var HTMLskills = '<li class="flex-item"><span class="white-text">%data%</span></li>';
var HTMLworkStart = '<div class="work-entry"></div>';
var HTMLworkEmployer = '<a href="#">%data%';
var HTMLworkTitle = ' - %data%</a>';
var HTMLworkDates = '<div class="date-text">%data%</div>';
var HTMLworkLocation = '<div class="location-text">%data%</div>';
var HTMLworkDescription = '<p><br>%data%</p>';
var HTMLprojectStart = '<div class="project-entry"></div>';
var HTMLprojectTitle = '%data%';
var HTMLprojectDates = '<div class="date-text">%data%</div>';
var HTMLprojectDescription = '<p><br>%data%</p>';
var HTMLprojectImage = '<img src="%data%">';
var HTMLschoolStart = '<div class="education-entry"></div>';
var HTMLschoolName = '<a href="#">%data%';
var HTMLschoolDegree = ' -- %data%</a>';
var HTMLschoolDates = '<div class="date-text">%data%</div>';
var HTMLschoolLocation = '<div class="location-text">%data%</div>';
var HTMLschoolMajor = '<em><br>Major: %data%</em>';
var HTMLonlineClasses = '<h3>Online Classes</h3>';
var HTMLonlineTitle = '<a href="#">%data%';
var HTMLonlineSchool = ' - %data%</a>';
var HTMLonlineDates = '<div class="date-text">%data%</div>';
var HTMLonlineURL = '<br>%data%';
var internationalizeButton = '<button>Internationalize</button>';
var googleMap = '<div id="map"></div>';
$(document).ready(function() {
$('button').click(function() {
var $name = $('#name');
var iName = inName($name.text()) || function(){};
$name.html(iName);
});
});
/*
The next few lines about clicks are for the Collecting Click Locations quiz in the lesson Flow Control from JavaScript Basics.
*/
var clickLocations = [];
function logClicks(x,y) {
clickLocations.push(
{
x: x,
y: y
}
);
console.log('x location: ' + x + '; y location: ' + y);
}
$(document).click(function(loc) {
// your code goes here!
});
var map; // declares a global map variable
/*
Start here! initializeMap() is called when page is loaded.
*/
function initializeMap() {
var locations;
var mapOptions = {
disableDefaultUI: true
};
/*
For the map to be displayed, the googleMap var must be
appended to #mapDiv in resumeBuilder.js.
*/
map = new google.maps.Map(document.querySelector('#map'), mapOptions);
/*
locationFinder() returns an array of every location string from the JSONs
written for bio, education, and work.
*/
function locationFinder() {
// initializes an empty array
var locations = [];
// adds the single location property from bio to the locations array
locations.push(bio.contacts.location);
// iterates through school locations and appends each location to
// the locations array. Note that forEach is used for array iteration
// as described in the Udacity FEND Style Guide:
// https://udacity.github.io/frontend-nanodegree-styleguide/javascript.html#for-in-loop
education.schools.forEach(function(school){
locations.push(school.location);
});
// iterates through work locations and appends each location to
// the locations array. Note that forEach is used for array iteration
// as described in the Udacity FEND Style Guide:
// https://udacity.github.io/frontend-nanodegree-styleguide/javascript.html#for-in-loop
work.jobs.forEach(function(job){
locations.push(job.location);
});
return locations;
}
/*
createMapMarker(placeData) reads Google Places search results to create map pins.
placeData is the object returned from search results containing information
about a single location.
*/
function createMapMarker(placeData) {
// The next lines save location data from the search result object to local variables
var lat = placeData.geometry.location.lat(); // latitude from the place service
var lon = placeData.geometry.location.lng(); // longitude from the place service
var name = placeData.formatted_address; // name of the place from the place service
var bounds = window.mapBounds; // current boundaries of the map window
// marker is an object with additional data about the pin for a single location
var marker = new google.maps.Marker({
map: map,
position: placeData.geometry.location,
title: name
});
// infoWindows are the little helper windows that open when you click
// or hover over a pin on a map. They usually contain more information
// about a location.
var infoWindow = new google.maps.InfoWindow({
content: name
});
// hmmmm, I wonder what this is about...
google.maps.event.addListener(marker, 'click', function() {
// your code goes here!
//quiz 4 lesson 6
infowindow.open(map, marker);
});
// this is where the pin actually gets added to the map.
// bounds.extend() takes in a map location object
bounds.extend(new google.maps.LatLng(lat, lon));
// fit the map to the new marker
map.fitBounds(bounds);
// center the map
map.setCenter(bounds.getCenter());
}
/*
callback(results, status) makes sure the search returned results for a location.
If so, it creates a new map marker for that location.
*/
function callback(results, status) {
if (status == google.maps.places.PlacesServiceStatus.OK) {
createMapMarker(results[0]);
}
}
/*
pinPoster(locations) takes in the array of locations created by locationFinder()
and fires off Google place searches for each location
*/
function pinPoster(locations) {
// creates a Google place search service object. PlacesService does the work of
// actually searching for location data.
var service = new google.maps.places.PlacesService(map);
// Iterates through the array of locations, creates a search object for each location
locations.forEach(function(place){
// the search request object
var request = {
query: place
};
// Actually searches the Google Maps API for location data and runs the callback
// function with the search results after each search.
service.textSearch(request, callback);
});
}
// Sets the boundaries of the map based on pin locations
window.mapBounds = new google.maps.LatLngBounds();
// locations is an array of location strings returned from locationFinder()
locations = locationFinder();
// pinPoster(locations) creates pins on the map for each location in
// the locations array
pinPoster(locations);
}
/*
Uncomment the code below when you're ready to implement a Google Map!
*/
// Calls the initializeMap() function when the page loads
window.addEventListener('load', initializeMap);
// Vanilla JS way to listen for resizing of the window
// and adjust map bounds
window.addEventListener('resize', function(e) {
//Make sure the map bounds get updated on page resize
map.fitBounds(mapBounds);
});

why are my google maps event listeners not working properly?

I'm trying to handle mouse over listener for each marker(there are 30 markers) and to show infowindows for these markers. I created listeners for each markers but when my mouse over the some marker it shows always the last marker's infowindows. To sum up I can't listen other markers. any help would be appreciated. thanks in advance and here my code :
var listeners = [];
for(var i = 0; i < markers.length; i++){
var marker = markers[i];
var contentString = contents[i];
listeners[i] = new google.maps.event.addListener(marker, 'mouseover', function() {
var hideInfoWindows = function(){
for (var j = 0; j < util.Common.infowindows.length; j++) {
util.Common.infowindows[j].close();
}
}
var addInfoWindow = function(){
var infowindow = new google.maps.InfoWindow({
content: contentString
});
//hideInfoWindows();
util.Common.infowindows.push(infowindow);
infowindow.open(util.Common.googlemap,marker);
}
addInfoWindow();
});
}
I'm also using js cluster library but I don't think the problem is related with it.

I think your problem might be that you are not using a closure inside the cycle, and when the event listener is fired, the marker and the contentString variables are pointing to the last marker.
Try to rewrite the cycle like this:
var listeners = [];
for(var i = 0; i < markers.length; i++){
(function(index){ //create a closure, variable 'index' will take its value from variable i, but won't be affected by changed i in the outer scope
var marker = markers[index]; //use this scope's index variable instead of i
var contentString = contents[index]; //use this scope's index variable instead of i
listeners[index] = new google.maps.event.addListener(marker, 'mouseover', function() {
var hideInfoWindows = function(){
for (var j = 0; j < util.Common.infowindows.length; j++) {
util.Common.infowindows[j].close();
}
};
var addInfoWindow = function(){
var infowindow = new google.maps.InfoWindow({
content: contentString
});
//hideInfoWindows();
util.Common.infowindows.push(infowindow);
infowindow.open(util.Common.googlemap,marker);
};
addInfoWindow();
});
})(i);
}

How to delete a direction markers in google map API

I want to delete a google map direction markers after a search without reloading the page. I've made an example but its not working :
//First of all testing if there is already a direction on the map
if(directionsService != null)
{
directionsService.setMap(null);
directionsService = null;
}
//Then display the new one
var origin = $('#de').val();
var destination = $('#en').val();
var request = {
origin : origin,
destination : destination,
travelMode : google.maps.DirectionsTravelMode.DRIVING
}
var directionsService = new google.maps.DirectionsService();
directionsService.route(request, function(response, status){
if(status == google.maps.DirectionsStatus.OK){
direction.setDirections(response);
showSteps(response);
}
});
all this code is on a function called by a click event
<button id="envoyer" id=="env" onclick="javascript:c()">Send</button>
so any one have an idea thanks !
Update
function showSteps(directionResult) {
var markerArray = [];
var myRoute = directionResult.routes[0].legs[0];
for (var i = 0; i < myRoute.steps.length; i++) {
var marker = new google.maps.Marker({
position: myRoute.steps[i].start_location,
map: map
});
attachInstructionText(marker, myRoute.steps[i].instructions);
markerArray[i] = marker;
}
}

When clearing the itinerary, using directionsService.setMap(null); you will have to remove the MapMarkers, which aren't directly connected to the Direction - Service, seperately too.
You have already stored them in markerArray inside of your showSteps - function, so you would need to move this variable out of the function into an outer scope or let the function return it to be able to access it.
By doing this, you can simply loop over the markerArray and call .setMap(null) on each stored Marker, thus removing them from the map.
var markerArray = [];
function showSteps(directionResult){
// your code
}
//function to remove MapMarkers
function removeMapMarkers(){
for(var i=0; i<markerArray.length; i+=1){
markerArray[i].setMap(null)
}
markerArray = [];
}

If data is null, dont show

This is my code. I get the data from xml. What I want is:
if a piece of data is null, don't show that row. How can I do it?
downloadUrl("xml/cat.xml", function(doc) {
var xml = xmlParse(doc);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
// obtain the attribues of each marker
var lat = parseFloat(markers[i].getAttribute("lat"));
var lng = parseFloat(markers[i].getAttribute("lng"));
var point = new google.maps.LatLng(lat,lng);
var kWa = markers[i].getAttribute("kWa");
var html = 'rows here ';
Sorry for wrong question..
i want to hide here
var html = '
id='+id+', kwa='+kwa+' // if id is null how can hide item in here..?
';

You can do this with if checks like:
if(markers[i].getAttribute("lat") != NULL) // or "NULL" as a string if thats what is returned."
var lat = parseFloat(markers[i].getAttribute("lat));
Or you could put it in a try - catch statement:
for (//codes){
try{
//try parsing here
}catch(e){
if(e) // do something with the error
}
Which has the advantage of letting you do something for each error message. But the disadvantage of being slow. (though not as slow as it used to be in javascript)

Getting value of "i" from GEvent

I'm trying to add an event listener to each icon on the map when it's pressed. I'm storing the information in the database and the value that I'm wanting to retrive is "i" however when I output "i", I get it's last value which is 5 (there are 6 objects being drawn onto the map)
Below is the code, what would be the best way to get the value of i, and not the object itself.
var drawLotLoc = function(id) {
var lotLoc = new GIcon(G_DEFAULT_ICON); // create icon object
lotLoc.image = url+"images/markers/lotLocation.gif"; // set the icon image
lotLoc.shadow = ""; // no shadow
lotLoc.iconSize = new GSize(24, 24); // set the size
var markerOptions = { icon: lotLoc };
$.post(opts.postScript, {action: 'drawlotLoc', id: id}, function(data) {
var markers = new Array();
// lotLoc[x].description
// lotLoc[x].lat
// lotLoc[x].lng
// lotLoc[x].nighbourhood
// lotLoc[x].lot
var lotLoc = $.evalJSON(data);
for(var i=0; i<lotLoc.length; i++) {
var spLat = parseFloat(lotLoc[i].lat);
var spLng = parseFloat(lotLoc[i].lng);
var latlng = new GLatLng(spLat, spLng)
markers[i] = new GMarker(latlng, markerOptions);
myMap.addOverlay(markers[i]);
GEvent.addListener(markers[i], "click", function() {
console.log(i); // returning 5 in all cases.
// I _need_ this to be unique to the object being clicked.
console.log(this);
});
}
});

You have an issue with closures. Your functions see i's last valuse. Simply add another closure to fix your error:
for(var i=0; i<lotLoc.length; i++) {
(function(i){
// ...
})(i); //run the function with i as argument
}//for