Develop Reference

JavaScript array has elements but length is zero

I've done some searching around the web and nothing seems to solve my problem. I have the following jQuery code:
function youtube_data_parser(data) {
//---> parse video data - start
var qsToJson = function(qs) {
var res = {};
var pars = qs.split('&');
var kv, k, v;
for (i in pars) {
kv = pars[i].split('=');
k = kv[0];
v = kv[1];
res[k] = decodeURIComponent(v);
}
return res;
}
//---> parse video data - end
var get_video_info = qsToJson(data);
if (get_video_info.status == 'fail') {
return {
status: "error",
code: "invalid_url",
msg: "check your url or video id"
};
} else {
// remapping urls into an array of objects
//--->parse > url_encoded_fmt_stream_map > start
//will get the video urls
var tmp = get_video_info["url_encoded_fmt_stream_map"];
if (tmp) {
tmp = tmp.split(',');
for (i in tmp) {
tmp[i] = qsToJson(tmp[i]);
}
get_video_info["url_encoded_fmt_stream_map"] = tmp;
}
//--->parse > url_encoded_fmt_stream_map > end
//--->parse > player_response > start
var tmp1 = get_video_info["player_response"];
if (tmp1) {
get_video_info["player_response"] = JSON.parse(tmp1);
}
//--->parse > player_response > end
//--->parse > keywords > start
var keywords = get_video_info["keywords"];
if (keywords) {
key_words = keywords.replace(/\+/g, ' ').split(',');
for (i in key_words) {
keywords[i] = qsToJson(key_words[i]);
}
get_video_info["keywords"] = {
all: keywords.replace(/\+/g, ' '),
arr: key_words
};
}
//--->parse > keywords > end
//return data
return {
status: 'success',
raw_data: qsToJson(data),
video_info: get_video_info
};
}
}
function getVideoInfo() {
var get_video_url = $('#ytdlUrl').val();
var get_video_id = getUrlVars(get_video_url)['v'];
var video_arr_final = [];
var ajax_url = "video_info.php?id=" + get_video_id;
$.get(ajax_url, function(d1) {
var data = youtube_data_parser(d1);
var video_data = data.video_info;
var player_info = data.video_info.player_response;
var video_title = player_info.videoDetails.title.replace(/\+/g, ' ');
var fmt_list = video_data.fmt_list.split(',');
var video_thumbnail_url = video_data.thumbnail_url;
var video_arr = video_data.url_encoded_fmt_stream_map;
//create video file array
$.each(video_arr, function(i1, v1) {
var valueToPush = {};
valueToPush.video_url = v1.url;
valueToPush.video_thumbnail_url = video_thumbnail_url;
valueToPush.video_title = video_title;
$.each(fmt_list, function(i2, v2) {
var fmt = v2.split('/');
var fmt_id = fmt[0];
var fmt_quality = fmt[1];
if (fmt_id == v1.itag) {
valueToPush.fmt_id = fmt_id;
valueToPush.fmt_quality = fmt_quality;
}
});
video_arr_final.push(valueToPush);
});
});
return video_arr_final;
}
function getUrlVars(url) {
var vars = {};
var parts = url.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m, key, value) {
vars[key] = value;
});
return vars;
}
function fillInOptions(ytOptions) {
//console.log(ytOptions);
//alert(ytOptions[0]);
var ytFill = ytOptions;
console.log(ytFill);
//ytFill.forEach(function(i,v) {
var ytdlOptions = $('#ytdlOptions');
ytFill.forEach(function(i,v) {
console.log(i);
ytdlOptions.append(new Option(v.fmt_quality, v.fmt_id));
});
return true;
}
function showYTDLLoader() {
$('#ytdlInput').fadeOut(1000, function() {
$('#ytdlLoader').fadeIn(500);
});
var options = getVideoInfo();
//console.log(options);
if (fillInOptions(options) == true) {
//do rest
}
}
function showYTDLOptions() {
return true;
}
function startDownload() {
showYTDLLoader();
}
function hideYTDLLoader() {
$('#ytdlLoader').fadeOut(500);
}
function animateCSS(element, animationName, callback) {
const node = $(element);
node.addClass(animationName);
function handleAnimationEnd() {
node.removeClass(animationName);
node.animationend = null;
if (typeof callback === 'function') callback();
}
node.animationend = handleAnimationEnd();
}
When my button is clicked, I call showYTDLLoader() which gets an array of objects from the YouTube API that looks like this:
[
{
"video_url": "https://r7---sn-uxanug5-cox6.googlevideo.com/videoplayback?expire=1572496003&ei=Iw66Xa24H8PL3LUPiN25mAs&ip=2001%3A8003%3A749b%3Aa01%3A5cd8%3Ac610%3A6402%3Ad0fe&id=o-ADsVnoOoBQ6-SWzYZU7gHES06s7xQptJG6hn9WcakITY&itag=22&source=youtube&requiressl=yes&mm=31%2C29&mn=sn-uxanug5-cox6%2Csn-ntqe6n7r&ms=au%2Crdu&mv=m&mvi=6&pl=39&initcwndbps=1655000&mime=video%2Fmp4&ratebypass=yes&dur=917.768&lmt=1572418007364260&mt=1572474311&fvip=4&fexp=23842630&c=WEB&txp=5535432&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cmime%2Cratebypass%2Cdur%2Clmt&sig=ALgxI2wwRgIhAIp-4gyUTLoXFetbY0ha_YnR7DJqsp_MNjjIxqDdfPZJAiEA_WPd21jgX9broBcigf8rcSEVoJb2_NX7t3XZQqytsSM%3D&lsparams=mm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AHylml4wRAIgacvP3zjEq-rVEZFrX7a_hC6TR-Zab7Ii-Fbaupjs_PcCIHdZht4l4ioYL3ERz7WNiSbnOnhm5iYxEECaQXPP2hUp",
"video_title": "Arnold Schwarzenegger on Son-in-law Chris Pratt, Pranking Sylvester Stallone & Terminator’s Return",
"fmt_id": "22",
"fmt_quality": "1280x720"
},
{
"video_url": "https://r7---sn-uxanug5-cox6.googlevideo.com/videoplayback?expire=1572496003&ei=Iw66Xa24H8PL3LUPiN25mAs&ip=2001%3A8003%3A749b%3Aa01%3A5cd8%3Ac610%3A6402%3Ad0fe&id=o-ADsVnoOoBQ6-SWzYZU7gHES06s7xQptJG6hn9WcakITY&itag=18&source=youtube&requiressl=yes&mm=31%2C29&mn=sn-uxanug5-cox6%2Csn-ntqe6n7r&ms=au%2Crdu&mv=m&mvi=6&pl=39&initcwndbps=1655000&mime=video%2Fmp4&gir=yes&clen=44248820&ratebypass=yes&dur=917.768&lmt=1572416976690256&mt=1572474311&fvip=4&fexp=23842630&c=WEB&txp=5531432&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cmime%2Cgir%2Cclen%2Cratebypass%2Cdur%2Clmt&sig=ALgxI2wwRQIhANTZJlBHFWQWCnfK11yvLiPUV26c6NzvqIMKjDwmsByMAiBUSy0ZJMo4GdHSiRU4xBDDLxLtzwKZAqAKCiB-1aViDQ%3D%3D&lsparams=mm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AHylml4wRAIgacvP3zjEq-rVEZFrX7a_hC6TR-Zab7Ii-Fbaupjs_PcCIHdZht4l4ioYL3ERz7WNiSbnOnhm5iYxEECaQXPP2hUp",
"video_title": "Arnold Schwarzenegger on Son-in-law Chris Pratt, Pranking Sylvester Stallone & Terminator’s Return",
"fmt_id": "18",
"fmt_quality": "640x360"
}
]
But when I try and loop through each entry with fillInOptions(), my loop is never completed because the length is apparently zero. However, when I dump the array using console.log() it tells me the length is 2, and displays the above. I need to be able to add each option to my dropdown.
Thankyou!
UPDATE: Added full code, sorry!

It looks like your .forEach() is the root of the problem. The parameters of a forEach are currentValue, index like this: array.forEach(function(currentValue, index) {}); but it looks like you're using them in the opposite way
Try rewriting that iteration to this:
ytFill.forEach(function(v, i) {
console.log(i);
ytdlOptions.append(new Option(v.fmt_quality, v.fmt_id));
});
Notice the difference in the order of v and i in the parameters.

Javascript: Caching within Closure doesn't work

I am trying to cache the result of the variable "url" in APP.findUrlParameter(). When executing the function the 2nd time, url should not be undefined anymore, but unfortunately it is.
example url: mypage.com?test=123&name=tom
(function () {
var APP = {
urlParameterPairs: function () {
var url;
if (window.location.search) {
url = window.location.search;
url = url.substring(1).split('&');
$.each(url, function (i) {
url[i] = url[i].split('=');
});
}
return url;
},
findUrlParameter: function (key) {
var url; // <---- to be cached !
console.log(url);
return (function () {
var result;
url = url || APP.urlParameterPairs();
$.each(url, function (i) {
var pair = url[i];
if (pair[0] === key) {
result = pair[1];
return false;
}
});
return result;
}());
}
};
console.log('name: ' + APP.findUrlParameter('name'));
console.log('test: ' + APP.findUrlParameter('test'));
}());
logs:
undefined
name: tom
undefined
test: 123
expected:
undefined
name: tom
Array: ["name", "tom"],["test", "123"]
test: 123

Thanks for the answers, of course "url" gets redeclared, stupid me didn't notice. I could solve it with wrapping a closure around it and returning a function like this:
findUrlParameter: (function () {
var url;
function f(key) {
var result;
url = url || APP.urlParameterPairs();
$.each(url, function (i) {
var pair = url[i];
if (pair[0] === key) {
result = pair[1];
return false;
}
});
return result;
}
return f;
}())

How to access String in Closure

by triggering xyEvent I want to concatenate a string. But myClosure() is always empty. Why? Thanks for help.
first.js:
$(document).ready(function () {
$("#...").on("tap", function () {
myClosure(new Item());
});
...
}
second.js
var string;
xyEvent {
string = "hello" + myClosure(); // here is the problem
});
var myClosure = (function () {
var anyString = "";
return function (item) {
if(item != null){
anyString = anyString.concat(item.name);
consloge.log(anyString); // perfect at this point
}
else{
return anyString;
}
}})();

I don't know. But this code here works fine.
It prints
a
ab
abc
result = abc
 
var myClosure = (function () {
var anyString = "";
return function (item) {
if(item != null){
anyString = anyString.concat(item.name);
console.log(anyString); // perfect at this point
}
else{
return anyString;
}
}})();
myClosure({name: "a"});
myClosure({name: "b"});
myClosure({name: "c"});
console.log("result = " + myClosure());

jQuery: Validate Multiple Emails

So I found these two functions:
validateEmail: function(value) {
var regex = /^([\w-\.]+#([\w-]+\.)+[\w-]{2,4})?$/;
return (regex.test(value)) ? true : false;
}
validateEmails: function(string) {
var self = shareEmail;
var result = string.replace(/\s/g, "").split(/,|;/);
for(var i = 0;i < result.length;i++) {
if(!self.validateEmail(result[i])) {
return false;
}
}
return true;
}
from this question:
Validate multiple emails with JavaScript
Can anyone tell me what does the variable "shareEmail" mean ? It is not defined and I don't understand what it means, what is it's purpose?

I have a feeling the code you didn't show looks like this:
showEmail = {
validateEmail: function(value) {
var regex = /^([\w-\.]+#([\w-]+\.)+[\w-]{2,4})?$/;
return (regex.test(value)) ? true : false;
},
validateEmails: function(string) {
var self = shareEmail;
var result = string.replace(/\s/g, "").split(/,|;/);
for(var i = 0;i < result.length;i++) {
if(!self.validateEmail(result[i])) {
return false;
}
}
return true;
}
};
In which case shareEmail's value is self-evident.

how to change javascript function to ActionScript 3?

anybody can help me to change that javascript function to AS3?
thanks :)
function parseURLtoVars(strLocation){
var rArray = new Array();
var key;
var urlString = new String(strLocation);
if (urlString.search(/\?/)>-1){
var qArray = urlString.split('?')[1].split('&');
if (qArray.length > 0){
for (key in qArray){
var arVal = qArray[key].split('=');
if (arVal.length ==2){
rArray[arVal[0]] = arVal[1];
} else {
continue;
}
}
return rArray;
} else {
return false;
}
}
return false;
}

How about
private function parseURLtoVars(strLocation:String):*
{
var rArray:Array = new Array();
var key:String;
var urlString:String = new String(strLocation);
if (urlString.search(/\?/)>-1){
var qArray:Array = urlString.split('?')[1].split('&');
if (qArray.length > 0){
for (key in qArray){
var arVal:Array = qArray[key].split('=');
if (arVal.length ==2){
rArray[arVal[0]] = arVal[1];
} else {
continue;
}
}
return rArray;
} else {
return false;
}
}
return false;
}

this returns params as an object, to return a boolean should be a simple edit.
function getParams(documentRoot):Object
{
try {
var params:Object = LoaderInfo(documentRoot.loaderInfo).parameters;
var pairs:Object = {};
var key:String;
for(key in params) {
pairs.key = String(params.key);
}
} catch(e:Error) {
return {};
}
return params;
}

I believe you just have to add type definitions to your function and variables.
So:
function parseURLtoVars(strLocation):Array
{
var rArray:Array = new Array();
var urlString:String = new String(strLocation);
...
for(var key:String in qArray)
...
return rArray;
} else {
return null;
}
}
return null;
}
I set the return of false to be nulls, but you can change your function return type to Object so you can return anything out of it, but I assumed you wanted an array to be returned.

It's not exactly what you asked, but in AS 3 I think there's an easier way:
import flash.net.URLVariables;
private function parseURLtoVars(strLocation:String):URLVariables {
strLocation = strLocation.indexOf("?") != -1 ? strLocation.split("?")[1] : strLocation;
return new URLVariables(strLocation);
}
And you could use it like this:
var testUrl:String = "test.php?key=value&key2=another_value";
var urlVars:URLVariables = parseURLtoVars(testUrl);
for(var k:String in urlVars) {
trace(k + " = " + urlVars[k]);
}