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How to convert calculator operation element to a string to get the solution and then return the solution back into the element?

So I'm making a JQuery calculator in codepen and I'm basically having the buttons write out the equation. So far so good. However I run into some problems once I try to get back the result of the calculations. How do I convert the calculations element in HTML into a variable string in JQuery and then return it back into the HTML as the solution?
Here is my codepen project link, as well as the problematic section of code: http://codepen.io/Starkiller12/pen/eJYGXY
$("#equal").click(function() {
var x = $("p");
$("p").empty();
$("p").html(x);
})

You can do like following:
$("#equal").click(function() {
var arr = $('p').text().split('+');
var first=parseInt(arr[0]);
var two=parseInt(arr[1]);
$("p").empty();
$("p").html(first + two);
})
Here it is done for addition(+).
You can do same for other.
Working Fiddle

your variable is storing the jquery object, not its contents
so var x = $("p"); should be var x = $("p").text(); or var x = $("p").html();

Google Script to see if text contains a value

I have a google form that when the user submits it will trigger my function to run which is creating a summary of what they submitted as a Google Doc. I know it can automatically send an email but I need it formatted in a way that my user can edit it later.
There are some check boxes on the form -- but the getResponse() is only populated with the items checked and I need it to show all possible choices. Then I will indicate somehow what was checked.
I can't find a way to see if a text contains a value.
Like in Java with a String, I could do either .contains("9th") or .indexOf("9th") >=0 and then I would know that the String contains 9th. How can I do this with google scripts? Looked all through documentation and I feel like it must be the easiest thing ever.
var grade = itemResponse.getResponse();
Need to see if grade contains 9th.

Google Apps Script is javascript, you can use all the string methods...
var grade = itemResponse.getResponse();
if(grade.indexOf("9th")>-1){do something }
You can find doc on many sites, this one for example.

Update 2020:
You can now use Modern ECMAScript syntax thanks to V8 Runtime.
You can use includes():
var grade = itemResponse.getResponse();
if(grade.includes("9th")){do something}

I had to add a .toString to the item in the values array. Without it, it would only match if the entire cell body matched the searchTerm.
function foo() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var s = ss.getSheetByName('spreadsheet-name');
var r = s.getRange('A:A');
var v = r.getValues();
var searchTerm = 'needle';
for(var i=v.length-1;i>=0;i--) {
if(v[0,i].toString().indexOf(searchTerm) > -1) {
// do something
}
}
};

I used the Google Apps Script method indexOf() and its results were wrong. So I wrote the small function Myindexof(), instead of indexOf:
function Myindexof(s,text)
{
var lengths = s.length;
var lengtht = text.length;
for (var i = 0;i < lengths - lengtht + 1;i++)
{
if (s.substring(i,lengtht + i) == text)
return i;
}
return -1;
}
var s = 'Hello!';
var text = 'llo';
if (Myindexof(s,text) > -1)
Logger.log('yes');
else
Logger.log('no');

Adding a javaScript array to a HTML page?

Im trying to add an array to a webpage. I have tried a few different pieces of code show below but none of them work. I would like the output to be similar to a list like:
text1
text2
text3
...
The code I have used so far is:
var i;
var test = new Array();
test[0] = "text1";
test[1] = "text2";
test[2] = "text3";
// first attempt
$('#here').html(test.join(' '));
// second attempt
$(document).ready(function() {
var testList="";
for (i=0;i<test.length; i++) {
testList+= test[i] + '<br />';
}
$('#here').html('testList');
songList="";
});
I am quite new to javaScript so I am not sure if I have just made a small mistake or if Im doing this in the wrong way. Also, above is a copy of all the code in my javaScript file and some places online are saying I need to import something? Im not sure!
Thanks

Try without quotes:
$('#here').html(testList);
-or-
$('#here').html(test.join('<br />'));
Another approach:
var html = ''; // string
$.each(test,function(i,val){ // loop through array
var newDiv = $('<div/>').html(val); // build a div around each value
html += $('<div>').append(newDiv.clone()).remove().html();
// get the html by
// 1. cloning the object
// 2. wrapping it
// 3. getting that html
// 4. then deleting the wrap
// courtesy of (http://jquery-howto.blogspot.com/2009/02/how-to-get-full-html-string-including.html)
});
$('#here').html(html);
There might be more code in the latter, but it'll be cleaner in the long run if you want to add IDs, classes, or other attributes. Just stick it in a function and amend the jQuery.

Try changing the line
$('#here').html('testList')
to
$('#here').html(testList)

What you have works if you remove the single quotes from testList. However, if you would like an actual unordered list you can do this. (here's a jsFiddle)
var test = new Array();
test[0] = "text1";
test[1] = "text2";
test[2] = "text3";
// first attempt
$('#here').html(test.join(' '));
// second attempt
$(document).ready(function() {
var testList=$("<ul></ul>");
for (var i=0;i<test.length; i++) {
$(testList).append($("<li></li>").text(test[i]));
}
$('#here').html(testList);
songList="";
}); ​

This line:
$('#here').html('testList');
shouldn't have single quotes around testList - you want to use the content of the variable, not the string literal "testList".

Don't pass the variable as a string : $('#here').html('testList'); Pass it without quotes : $('#here').html(testList);

Here's the simplest version:
$(document).ready(function() {
var test = ["text1", "text2", "text3"];
$('#here').html(test.join("<br>"));
});

jQuery .each help, I want to trim() all the strings in an array

I'm splitting a string into an array, then I want to remove the white space around each element. I'm using jQuery. I'm able to do this successfully with 2 arrays but I know it's not correct. How do I loop thru an array and trim each element so the elements keep that change. Thanks for any tips. Here is my working code using two array. Please show me the correct way to do this.
var arVeh = vehicleText.split("|");
var cleanArry = new Array();
$.each(arVeh, function (idx, val) {
cleanArry.push($.trim(this));
});
Cheers,
~ck in San Diego

You don't even really need the idx or val parameters. This appears to work on jsFiddle:
var cleanVehicles = [];
$.each(vehicleText.split("|"), function(){
cleanVehicles.push($.trim(this));
});
EDIT: Now that I've seen what you're really after, try using map:
var cleanVehicles = $.map(vehicleText.split("|"), $.trim);

I'm going to suggest not using the overhead of jQuery for a simple for-loop...
var arVeh = vehicleText.split("|");
for (var i = 0, l = arVeh.length; i < l; ++i) {
arVeh[i] = $.trim(arVeh[i]);
});
Alternatively, get rid of the whitespace from the beginning, and avoid the need for another loop at all.
var arVeh = $.trim(vehicleText).split(/\s*\|\s*/);

Without 'creating' an array in the javascript code (an array will nevertheless be created in memory)
vehicles = $.map(vehicleText.split("|"), function(e,i) { return $.trim(e) });

var my_arr = [' cats', 'dogs ', ' what '];
$.each(my_arr, function (id, val) {
my_arr[id] = $.trim(val);
});
console.log(my_arr);
This will trim the value and set it to the indexed item.

You don't have to use JQuery. Here is your vanilla solution:
testArray.map(Function.prototype.call, String.prototype.trim);
Function.prototype.call calls trim() on each of the elements of the testArray. As simple as that!

Could you not just do this?
var arVeh = vehicleText.split("|");
$.each(arVeh, function (idx, val) {
arVeh[idx] = $.trim(this);
});

//a simple function
function trimArray(dirtyArray){
$.map(dirtyArray.split("|"), function(idx, val){
return $.trim(this);
});
}
trimArray(vehicleArray);
should do the trick
Or you could use some of the awesome power of javascript and use array.prototype. I'm still a little new at using the .prototype of any object... so this isnt guaranteed to work (but it certainly can be done).
Array.prototype.trim = function (){
$.map(dirtyArray.split("|"), function(idx, val){
return $.trim(this);
});
}
someArray.trim()

You need these two jQuery functions:
1.) iterate through array element with ability to edit items:
http://api.jquery.com/jquery.map/
2.) remove blank spaces from beginning and end of a string:
http://api.jquery.com/jQuery.trim/
Use them this way:
array = $.map(array, function(value) { return value.trim();});
Check this JSFiddle:
https://jsfiddle.net/L00eyL4x/49/

Form value addition with js

I'm trying to write a order form that shows the value of the selected items automatically. The backend is already complete, and on the front end each field, all radio / checkbox, look like this:
<input type="radio" name="shirt-size" value="shirt_size_m[18]" />
'18' being the price, everything else being irrelevant to the front end price calculation. I cannot change the naming convention, so I need to get the value between the brackets on all the <input>s on the page (or below the parent ID), add them together (on update), and append the value to another ID. Jquery is already in use on the site if that makes thongs easier.
I just need to be pointed in the right direction as my JS experience is limited to examples and minor customizations :)

Try using a simple regular expression with Javascript's replace, to replace all non-numeric characters with the empty string:
var str = "shirt_size_m[18]";
var theNumber = parseInt(str.replace(/[^0-9]/g, ''));
alert(theNumber);
Demo: http://jsfiddle.net/XvTaY/1/

You could try something like this:
function calculate_sum(form_id) {
var $form = $(form_id);
var sum = 0;
$checkbox_and_radios = $form.find('input[type=checkbox], input[type=radio]').each(function(){
sum += parseInt($(this).val().match(/^[^\[]+\[(\d+)\]$/)[1]);
});
return sum;
}
$(function(){
$("#id_of_the_form").find('input[type=checkbox], input[type=radio]').change(function(){
var sum = calculate_sum("#form_id");
// I don't know the type of your element containing
// the sum, so I put multiple solutions here:
// some input element
$('#another_id').val(sum);
// or another element
$('#another_id').html(sum);
// I'm assuming you don't really mean append
// If you're sure you want to append: (but then the old value won't be deleted)
$('#another_id').append(sum);
});
});

u can use:
var v;
v = $('#input-identifier').val();
v = v.split("[");
v = v[1];
v = v.split("]");
v = v[0];
// now v has the number