I didn't want to use the default site.js, but just write the Javascript on the view page itself, "its kinda confusing for me". but still, after further exploration online, I still cannot figure out why I am not redirected as intended. I tried running codes from https://www.dreamincode.net/forums/topic/414946-pick-website-from-random-list-redirect/
and How do I make a HTML button open in random links in new tab
in which both seemed to work in online simulator, w3school. But when I replicated the functions, it seemed to return a null/undefined value for redirection.
Code:
var Links = ['https://longdogechallenge.com/ ',
'http://heeeeeeeey.com/ ',
'http://corndog.io/ ',
'https://thezen.zone/ ',
'http://hasthelargehadroncolliderdestroyedtheworldyet.com/ ',
// lots more snipped
'http://papertoilet.com/ '];
var RandFx = Links[Math.floor(Math.random * Links.length)];
function RandX() {
window.location = RandFx;
}
As stated, the RandFx seems to be containing undefined value. What am I doing incorrectly? can it be due to the extended length of urls in the Links variable?
Math.random is a function, you should be using Math.random() to get the actual result:
var RandFx = Links[Math.floor(Math.random() * Links.length)];
The problem is that the index you are calculating results in NaN:
var index = Math.floor(Math.random * Links.length)
var RandFx = Links[index];
And Links[NaN] is undefined.
The index is NaN because you are calling Math.random instead of Math.random(). Passing the function instead of the result of the function gives you an error.
This jsfiddle shows what's happening: https://jsfiddle.net/74skonhL/
Related
Here is my Javascript code.
$("#changetemp").click(function () {
var temp = $("#temperature").html;
var final_letter = temp[temp.length-1];
$("#temperature").html(function ()
{if (final_letter == "F") {return celsius;}
else {return fahrenheit;}});});
});}});});
It is supposed to toggle the temperature between celsius and fahrenheit but does a big fat nothing. I've googled and changed a few things (e.g. gone between val, html and text, and tried charAt but I can't get it to do anything, let alone the right thing. Any suggestions would be very welcome.
Edit: "#changetemp" is the button you click to toggle between temperature (ideally).
"#temperature" is where the temperature displays (and it does, but then won't change).
Also tried:
console.log(final_letter); (which gave the correct letter in the console)
console.log(celsius); (which reports as 'undefined') as does console.log(fahrenheit);
These two are defined earlier via a JSON
$.getJSON( url, function(location){ var celsius =
$("#temperature").html(Math.round(location.main.temp - 273) + "°C");});
and I tried to make them be global variables by putting
var celsius;
var fahrenheit;
after the beginning of the first function (which surrounds everything else) but I'm guessing that didn't work.
More:
Googling suggests that variables cannot begin with a number. Is this what is stopping me here?
1. I've managed to show the temperature though, just not change it.
2. How do you get round that? I tried changing the code so that 'celsius' would give 'Temperature: 10C' rather than '10C' but that didn't solve it.
i assume the error is in the line var temp = $("#temperature").html;
Does it help if you change it to var temp = $("#temperature").html();?
html is a jQuery function, so you need to call it with the parantheses. Otherwise temp will not contain the content of the #temp element, but rather a reference to the html method. Therefore you don't get the last letter of the content.
I am using this code (from Harsha Jagadish) that does a quick little speed test to my URL of choice. It outputs the expected result just fine
return this.each(function() {
var g = foo();
$(this).text(g).append("Mb per second" + newg);
});
But what I need to do is grab that same output to compare if it's greater or less than a specific number. The issue is it's an object. I tried JSON.stringify and a couple of things, but no luck.
What am i missing?
I was trying to crawl a very old website for a specific tag, I need to get it by it's for= attribute. So I used this piece of code.
var character = document.querySelectorAll("label[for=char_1]");
For some reason it returns an undefined, but I was using this script for a few days now and it worked like a charm. Here's the fun part. Typing that command in browsers console will result in undefined. But typing this alone:
document.querySelectorAll("label[for=char_1]");
Will return a proper NodeList. Why it won't assign to a variable...?
edit: It seems that deleting var and typing character without it will make it work. It's resolved but I would still love to get an answer to "why is this happening"?
edit2:
for (var i = 0; i < 15; i++) {
var character = document.querySelectorAll("label[for=char_" + i +"]");
console.log(character); // this will return [] from the script.
var color = character[0].children[0].style.color;
}
A simple for loop. All I get is Cannot read property 'children' of undefined. But I can type in the very same command document.querySelectorAll... and it will work in the browser and will return NodeList.
I had it working like this in a very hacky script. It worked.
var character1 = document.querySelectorAll("label[for=char_1]");
var characterColor1 = character1[0].children[0].style.color;
edit3:
var character1 = document.querySelectorAll("label[for=char_1]");
var characterColor1 = character1[0].children[0].style.color;
var character2 = document.querySelectorAll("label[for=char_2]");
var characterColor2 = character2[0].children[0].style.color;
// ...
The above code works without a single problem though. I don't think it's DOM not being ready as this code is also run from Greasemonkey script and it works. The only difference is the for loop.
var x = ""; // returns undefined, because it's a var assignment.
var elements = document.querySelectorAll('div');
That's expected behavior when pasted into the console.
edit: It seems that deleting var and typing character without it will make it work. It's resolved
I'm afraid you're creating a global scope variable now. or perhaps characters is an already defined variable in that scope.
Buhah, as I said in edit 3 "the only difference is the for loop". I was so busy trying to find an answer in the DOM-related things that I made the simplest mistake ever done in programming.
See?
char_1
With...
for(var i = 0...)
0! And I was testing char_1 in the browser instead of char_0. Which - truly - returns [] instead of something useful. Time to go on a holiday break I guess, my brain seems to be there already. :)
I am trying to find occurrences of a string in another string that has been pulled from the HTML document. The page is an SNMP monitor but we have been having issues in the past with CTRL + F because it only wants to find the string within the current viewport of the browser. My attempt at getting around this and not having to look through things manually was to write a script.
The issue here is that it appears the docHTML variable is only able to hold so much data and anything else is truncated. I have looked around on Stack Overflow and found that my string size is significantly less than other people have tried, so that shouldn't be the issue.
All of the IP addresses in the 'ipArray' variable do exist on the page in different locations and are in the docHTML variable when I look through it myself. When I run the doSearch function at various points in the page (viewport dependent) it gives me different results.
I really don't know what has gone wrong here as the code does work sometimes, and not other times. My goal is to have the code go through the whole page and find all missing IP's and add them to the array so that we can go ahead and add them instead of having to compare 490 IP's on a spreadsheet to up to 490 in the monitoring utility.
Thanks in advance!
var docHTML = document.documentElement.outerHTML;
var missing = [];
function doSearch(text) {
if (docHTML.search(text) == -1){
missing.push(text);
}
}
var ipArray = [
"192.168.64.236",
"192.168.64.237",
"192.168.64.238",
"192.168.64.10",
"192.168.64.11",
"192.168.64.12",
"192.168.65.40",
"192.168.65.47"
];
var Total = ipArray.length;
for(i=0;i<Total;i++){
doSearch(ipArray[i]);
}
console.log("Missing IP's: " + (Total - missing.length));
console.log(missing);
Here is the solution, not much of change, just a tweak to your logging statement. You were printing "total-missing" which is wrong. What we need is the missing count-
var docHTML = document.documentElement.outerHTML;
var missing = [];
function doSearch(text) {
if (docHTML.search(text) == -1){
missing.push(text);
}
}
var ipArray = [
"69.171.224.11",
"199.59.149.230",
"174.121.194.34",
"209.200.154.225",
"69.174.244.50",
"67.201.54.151"
];
var Total = ipArray.length;
console.log(Total);
for(i=0;i<Total;i++){
doSearch(ipArray[i]);
}
console.log("Missing IP's: " + (missing.length)); /***HERE***/
console.log(missing);
Other than this, the whole code worked for me as expected. Let me know what else/exactly is the issue. Happy to help.
The code works as intended. The issue happened to be the SNMP monitor it is running on top of. Everything on the page seems to be loaded by POST requests as you scroll. It seems to grab a few before and after which was why I was able to see it in the code and not when executing.
not a js expert so this might be a stupid question but...
Why does the log show that the array has changed? I was expecting the array still to be a [0,0] since the method is invoked after the console.log. Also, if I try to replace the whole array like this:
this.my_array = [1,0];
the log will still show [0,0], which is something that makes more sense to me.
What's going on?
function Y() {
this.my_array = [0,0];
this.changeIt = function() {
this.my_array[0] = 1;
};
}
var z = new Y;
console.log(z.my_array);
z.changeIt();
In some browsers (Chrome, for instance) console.log displays a live, interactive display of your array, not a point-in-time snapshot. So if you're looking at the console after this runs, it's been updated because of the change. Chrome also does slightly different things when you use console.log interactively in the console panel than when you use it from within a script.
You'll see what you're expecting if you display a string instead:
var z = new Y;
console.log(z.my_array.join(", "));
z.changeIt();
That shows the point-in-time snapshot you're expecting.
It works for me: http://jsfiddle.net/LyhgW/
Edit: The fact that i'm using alert makes this code work. This works around Chrome's live-feature in the console and displays a snapshot instead.