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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');

Getting Word Anywhere from Textarea

I am trying to use a variable of a textareas value but I don't want the entire value only the new word that is being written.
What I've tried doing is something like this-
function getValue(ele,array){
var a = ele.val();
array.push(a);
}
function newWord(ele,array){
var b =ele.val();
array.toString.match(b);
}
$(function() {
$('#textarea').keyup(function() {
var array = [];
getValue($(this),array);
console.log(array);
var c = newWord($(this),array);
console.log(c);
});
});
What I was hoping for is that it would get the newly typed word. All I want to do is get that new word that is being typed up until a space is entered. And I was working with a few plugins that would getSelection for all modern browsers and well that just didn't work for me as well.
Does anyone have a suggestion on the best way to do this? I don't mind on keep trying myself just need a little hand to lead me on the right path to get my full code working the way I need it to. Full Code is here http://jsbin.com/obihig/1/edit it is a Auto Suggestion, for textarea, and it needs to be for every word being written.

$(function() {
$('#textarea').keyup(function() {
var array = [];
var newWord;
array = this.val().split(' ');
console.log(array);
newWord = array[array.length - 1]
console.log(newWord);
});
});

remove specific line from json with jquery

I have this array:
var array = [{"a":"1","b":"2"},{"a":"3","b":"1"},{"a":"5","b":"4"}]
now i want to remove the line, lets say, where a=5. So afterwards the array looks like this:
var array = [{"a":"1","b":"2"},{"a":"3","b":"1"}]
How do i do this the easiest and fastest way?

You can use jQuery.map which allows you to return null for an element to be deleted.
eg:
var array = [{"a":"1","b":"2"},{"a":"3","b":"1"},{"a":"5","b":"4"}]
var newArray = $.map(array, function(e){
return (e.a == "5") ? null : e;
});
// newArray contains [{"a":"1","b":"2"},{"a":"3","b":"1"}]
Live example (watch the console): http://jsfiddle.net/2Yz7f/

Javascript (non jQuery) approach: http://jsfiddle.net/VYKBc/

Maybe this is your answer
array.splice(2,1);

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/