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JavaScript - Compare Arrays
hi i have two arrays and i need to know which strings are in both arrays.
i know how to do the bit if the string is in both but i don't know how to compare them as such. thanks Similar TutorialsI have 2 arrays and I would like to compare the 2 arrays. If an element in array 1 is NOT in array 2 then I would like to display that element. In this case, I should only display the letter "c" but it doesn't work and I don't know why?? Here's my code: Code: <html><head>
<script type="text/javascript">
function getValue(id){
var x=new Array("a","b","c","d","e");
var y=new Array("a","b","3","d","e");
var str="";
for (var i=0; i<x.length; i++){
for (var j=0; j<y.length; j++){
if (x[i] == y[j]){
break;
}else{
//Check if reach the last element in the array 2
//If yes, then display that element in array 1 b/c not in array 2
if (y[j] == y.length-1){
str += x[i];
}
}
}
}
document.getElementById(id).innerHTML = str;
}
function init(){
getValue("info");
}
</script>
</head>
<body onload="init()">
<h2 id="info"></h2>
</body>
</html>
I need to loop the alphabet and numbers 0-9 to initialize a few thousand arrays. This is for my site and is truly needed. http://www.thefreemenu.com I currently have every array written out and it takes up to much space in my .js file. The majority of my variables are empty but necessary and need to be there (including empty) for my site to work properly. Question is the last part Here's where I'm at. Code: var NewVarLetterOrNum = "a";
eval("_oneofseveralnames_" + NewVarLetterOrNum + "='this part works';");
alert(_oneofseveralnames_a);
This creates the variable _oneofseveralnames_a='this part works' Code: var newArrayLetterOrNum = "a";
eval("_oneofseveralnames_" + newArrayLetterOrNum + "= new Array();");
alert(_oneofseveralnames_a)
This creates the Array _oneofseveralnames_a=new Array(); and all the values in the array are null, but, now a variable like _nl_a[1]='something' can be used elsewhere because the array exists. This is all that is necessary for now because I can probably set all the variables to be blank with something like Code: i=1
while(i<=20){
_oneofseveralnames_a[i]="1-20";
i++
}
alert(_oneofseveralnames_[20]);
So now you have what I came to understand in the first few hours. Now to the hard part : ( I can't make multiple array's dynamically. I dont' know if its because I don't understand loops or arrays or what and its very fustrating. As for any answer you might be so kind as to provide, if you could dumb it down that would be greatly appreciated. Code: var newArray =new Array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z')
i=1
while(i<=26){
eval("_nl_" + newArray[i] + "= new Array();");
i++
}
alert(newArray[1]) // Is b, but
alert(_nl_b) //I can't get _nl_b to exist, I tried everything including taking away the quotes around the letters in every test
*/
var _nl_a =new Array()
var _img_a =new Array()
var _h_a =new Array()
var _r_a =new Array()
var _m_a =new Array()
var _yt_a =new Array()
var _i_a =new Array()
The above arrays are all the array _name_ parts I need but for example, a has 10 parts, a,p2_a,p3_a,.. p10_a. I need 10 pages for each letter of the alphabet and numbers 0-9 and a special all1, p2_all1 ... p10_all1. Overall 2200 arrays that need to be declared. Currently they are all written out.
/*
Hello all, I'm trying to lern javascript, but my knowledge doesn't cover what I want, so I could use some help. I'm trying to make a lotto check form for our family. What it as to do is check the numbers(B) with numbers(A) Code: <SCRIPT TYPE="TEXT/JAVASCRIPT">
// Check lotto
function checkLotto() {
var goed = frmTrekking.EersteGetal.value
var fout = frmGetallen.Opgegeven_1.value
if (frmTrekking.EersteGetal.value == frmGetallen.Opgegeven_1.value) {
document.getElementById('boldStuff').style.color='#00ff00';
document.getElementById('boldStuff').innerHTML = goed;
}
else {
document.getElementById('boldStuff').style.color='#ff0000';
document.getElementById('boldStuff').innerHTML = fout;
}
}
</script>
Code:
<body onload="checkLotto();">
<form id="frmGetallen" name="frmGetallen" method="post" action="">
<table width="100%" border="0" cellspacing="5" cellpadding="5">
<tr>
<td width="9%"><strong>A</strong></td>
<td width="6%"><strong>Naam</strong></td>
<td width="10%"><strong>1</strong></td>
<td width="10%"><strong>2</strong></td>
<td width="10%"><strong>3</strong></td>
<td width="10%"><strong>4</strong></td>
<td width="10%"><strong>5</strong></td>
<td width="10%"><strong>6</strong></td>
<td width="10%"><strong>7</strong></td>
<td width="10%"><strong>8</strong></td>
<td width="10%"><strong>9</strong></td>
<td width="10%"><strong>10</strong></td>
</tr>
<tr>
<td><strong>1</strong></td>
<td><strong>Joop</strong></td>
<td><b id='boldStuff'><input name="Opgegeven_1" type="hidden" id="Opgegeven_1" value="6" size="5" /> </b></td>
<td><b id='boldStuff'><input name="Opgegeven_2" type="hidden" id="Opgegeven_2" value="8" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_3" type="hidden" id="Opgegeven_3" value="16" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_4" type="hidden" id="Opgegeven_4" value="18" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_5" type="hidden" id="Opgegeven_5" value="26" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_6" type="hidden" id="Opgegeven_6" value="28" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_7" type="hidden" id="Opgegeven_7" value="32" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_8" type="hidden" id="Opgegeven_8" value="36" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_9" type="hidden" id="Opgegeven_9" value="38" size="5" /></b></td>
<td><b id='boldStuff'><input name="Opgegeven_10" type="hidden" id="Opgegeven_10" value="41" size="5" /></b></td>
</tr>
</table>
</form>
<form id="frmTrekking" name="frmTrekking" method="post" action="">
<label></label>
<table width="58%" border="0" cellspacing="5" cellpadding="5">
<tr>
<td width="7%"><strong>B</strong></td>
<td width="10%"><input name="EersteGetal" type="text" id="EersteGetal" value="6" size="5" /></td>
<td width="10%"><input name="TweedeGetal" type="text" id="TweedeGetal" value="12" size="5" /></td>
<td width="10%"><input name="DerdeGetal" type="text" id="DerdeGetal" value="20" size="5" /></td>
<td width="10%"><input name="VierdeGetal" type="text" id="VierdeGetal" value="32" size="5" /></td>
<td width="10%"><input name="VijfdeGetal" type="text" id="VijfdeGetal" value="5" size="5" /></td>
<td width="10%"><input name="ZesdeGetal" type="text" id="ZesdeGetal" value="15" size="5" /></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</table>
</form>
What I have now is the check between 2 numbers, I need to have it checked all, so all the B numbers have to be checked with all the A numbers. I think i'll need a sort of loop in a array, but I really don't know how to do this. Can somebody help me with this please? Hi is it possible to compare 2 php variables with javascript and hide-show a div according to the result? lets say php variables are Code: $a $b and if ($a > $b) show the div can anyone please help me to do this? Sorry for language errors Thanks Hi All, I'm trying to convert a string based on the contents of another string. For example, I have two strings - "Purple" and "Orange" and a variable "P" - I want the script to look at the word "Purple" and everytime is sees the letter "P", assign this to a third variable (result variable) - if the letter it's looking at is not a "p", I want it to take that character from "Orange" and add it to the result string. So the result would be "Prapge". This is the code I have so far, and it doesn't work, absolutely stumped as to why ... Code: function fillInChar(targetString, otherString, newChar)
{
var splitTarget = targetString.split('');
var splitOther = otherString.split('');
var resultArray = newArray(splitTarget.length);
var holdVar = '';
for (var position = 0; position < splitTarget.length; position = position + 1)
{
if (splitTarget[position] != newChar)
{
var holdVar = splitOther[position];
resultArray[position] = holdVar
}
else
{
resultArray[position] = newChar
}
}
return resultArray
}
document.write('IF VISIBLE - LOOP IS VIABLE' + '<BR>')
var testVar = fillInChar('purple', 'orange', 'p');
document.write('HELLO WORLD!!! .... ' + testVar);
I would appreciate assistance with the following case. Thank you in advance. I have two fields with values, e.g. Field1: 123456-1- 01 Field2: 01 -0001 I need to compare the last two digits of Field1( 01 ) against the First two digits of Field2 ( 01 ) I would assume OnChange moving from Field2. If the two do not match throw an alert. Thanks!! I want to compare items based on what the user picks there will be 3 drop down menus and the drop down menus should alter the HTML table each time it is changed, giving different option values and stuff. I am wondering how to go about this I have the basic stuff setup but I am not really sure how to add to a table that all 3 options use. Any help would be greatly appreciated. Here is my current code for the drop downs. Code: <form name="compare"> <select name="compare"> <option value="V1">Value 1</option> <option value="V2">Value 2</option> <option value="V3">Value 3</option> <option value="V4">Value 4</option> </select> <select name="compare2"> <option value="V1">Value 1</option> <option value="V2">Value 2</option> <option value="V3">Value 3</option> <option value="V4">Value 4</option> </select> <select name="compare3"> <option value="V1">Value 1</option> <option value="V2">Value 2</option> <option value="V3">Value 3</option> <option value="V4">Value 4</option> </select> <input type="button" onClick="location=document.jump.menu.options[document.jump.menu.selectedIndex].value;" value="Compare"> </form> I want the user to select one of the options from above and a table to show up showing the differences between the others for example; someone selects Value 1 for compare, and Value 2 for compare 2, and Value 3 for Compare 3, they should be shown a table which has the differences between Value 1, Value 2, Value 3. So lets say Value 1 and Value 3 offers you "Help" while value 2 doesn't. it should show a table that says Features Value 1 Value 2 Value 3 Help YES NO YES how would I go about doing this? Hello all, Can anyone help me with a script for changing font color of a number within a table when there is a match? Table A contains numbers and table B contains numbers. When table B numbers matches some of the numbers in table A, the numbers in table A need to change color. I hope you understand what I mean. I have one html text area in my JSP file. when i click on that text area, a pop-up will come, in that pop-up i have list of items. So after selecting a item from that pop-up list, need to click okay. so that text area will update with the selected value. In this case, i need to compare the first text area value and updated text area value. How can i do that in Java Script. I'm trying to make something a lot like a store locator where a user types in their address of origin and submits, then the script compares the driving distances between their entered address and the 4 destination locations that I will store in an array once the page loads. It's kind of hard to describe. I have a form working to do the distance and driving directions once I know which destination will be chosen. This is what I have so far: http://rowsdower.freehostia.com/map_test.php That seems to be working just fine. The problem is that I just can't get anything working that will compare the distance between the origin and each of the options before choosing and displaying directions to the nearest destination. My ultimate goal is to update the list of <options> with PHP and maybe MySQL - though I really don't need this to be large-scale. Then, after the user inputs a starting address if they choose a specific location from the dropdown it will give those directions, otherwise (if the "choose closest location" option is still active) then I will run a comparison of driving distances for each option's address value and store them to an array. Once all locations are read and tested for driving distance I want to take the closest location set that option as selected, and then run the call for driving directions as usual. I know how to pull the option values, how to set and unset the "selected" attribute, and how to check to see if distances need to be compared. I can figure out how to do just about everything I need EXCEPT for getting the google maps API to play along. I've tried so many dead-end ideas that I have just reset my map code to square one. Any ideas for a script piece to run that will return only the driving distance for a list of locations? The onclick event listener would be something like this Code: Array.prototype.findIndex = function(value){
var ctr = "";
for (var i=0; i < this.length; i++) {
// use === to check for Matches. ie., identical (===), ;
if (this[i] == value) {
return i;
}
}
return ctr;
};
// ===== request the directions =====
function getDirections() {
document.getElementById("directions").style.display="block"; //displays the directions container
var saddr = document.getElementById("search1").value; //the user's origin
var daddr = document.getElementById("search2").value; //the selected destination
if (daddr=="Closest Location") {
var distances = [0];
for (i=1;i<document.getElementById("search2").options.length;i++) {
//setting i=1 so I skip the "closest Location" option...
if (document.getElementById("search2").options[i].selected) {
document.getElementById("search2").options[i].removeAttribute("selected"); // de-select each option as we go just in case...
}
var destination = document.getElementById("search2").options[i].value; // pulling up the stored address
//run driving directions comparison here then set "daddr" to the address whose driving distance is least
distances[i]=getDrivingDistance(saddr,destination); /* <----- I just made this up, I don't really know
how to get this done but I want it to be as
simple as this somehow...*/
}
daddr = distances.findIndex(distances.min()); // Finds index of the lowest driving distance
document.getElementById("search2").options[daddr].setAttribute("selected","selected"); // marks closest location as selected
daddr = document.getElementById("search2").options[daddr]; // sets destination address to same index as least distance index
}
// at this point I have either the user-defined destination or else the closest destination, so I find the directions...
var locale = getLocale();
var dirOpts = {
locale: locale,
getPolyline: true
};
if (document.getElementById("walkingDirections").checked) {dirOpts.travelMode = G_TRAVEL_MODE_WALKING;}
if (document.getElementById("avoidHighways").checked) {dirOpts.avoidHighways = true;}
if (mapPreserveViewport) {
dirOpts.preserveViewport = true
}
gdir.load("from: "+saddr+" to: "+daddr, dirOpts);
}
I'm going cross-eyed trying to get this working. Does anyone have any ideas for a code blurb to tie this all together? I think everything else should work once I get through the distance iterations but I'm useless with the google maps API... First of all thank you for reading my thread and giving time to help me. Here goes my question: How to sort this array? MY PRIORITY COLORS array: ------------ green , yellow ALL COLORS array : <---- this will be your main array. ----------------------- pink , green , orange THE RESULTS: ( the results after you sort) (Not sorted by alphabetically, but sorted by the priority colors) ---------------- green , pink , orange I hope you could help me solve this javascript sorting problem. Thank you! Code: <HTML>
<HEAD>
<TITLE>Listing 4.4</TITLE>
<SCRIPT TYPE="text/javascript">
//DEFINE METHOD
function displayInfo() {
document.write("<H1>Employee Profile: " + this.data[0] + "</H1><HR /><PRE>");
document.writeln("Employee Number: " + this.data[1]);
document.writeln("Social Security Number: " + this.data[2]);
document.writeln("Annual Salary: " + this.data[3]);
document.write("</PRE>");
}
//DEFINE METHOD TO GET EMPLOYEE INFORMATION
function getInfo() {
var menu="0-Exit/1-Name/2-Emp. #/3-Soc. Sec. #/4-Salary";
var choice=prompt(menu,"0");
if (choice != null) {
if ((choice < 0) || (choice > 4)) {
alert ("Invalid choice");
this.getInfo();
} else {
if (choice != "0") {
this.data[choice-1]=prompt("Enter information","");
this.getInfo();
}
}
}
}
//DEFINE OBJECT
function employee() {
this.data = new Array(4);
this.displayInfo=displayInfo;
this.getInfo=getInfo;
}
newEmployee=new employee();
</SCRIPT>
</HEAD>
<BODY>
<SCRIPT TYPE="text/javascript">
newEmployee.getInfo();
newEmployee.displayInfo();
</SCRIPT>
</BODY>
</HTML>
I am currently taking a Javascript certification course, this is a exercise given (final code) I don't completely understand what is going on though, could someone explain to me Code: this.data[choice-1]=prompt("Enter information","");
that part? I don't understand why, [choice-1] I don't fully understand why an array is even needed here? Hi. I am fairly new to JavaScript. I am having some troubles with arrays. I am using Chrome 12 beta. Here is a brief version of the code I am having trouble with Code: var array=new Array() array[0]=new Array() array[0][1]=new Array() var array[0][1]=[ 3, 1, 4, 1, 5, 9, 2, 6, 5, ... ]; I do not want to use "array[0][1][n]" because my array has too many items to do that and it is just plain annoying to change the numbers that way. I get an error on the "var buffers[0][1]=[" line saying: "Uncaught SyntaxError: Unexpected token [" What is the problem in my code? Thank you ahead of time. ---mint Hi could someone help with this javascript. i dont know where to start with the script which is in bold. Program to report the results of an election. // candidates var candidateArray = ['Mr R Green...', 'Ms O Brown...', 'Ms Y Black...', 'Mr G White...', 'Ms B Grey....','Ms I Blue....', 'Mr V Pink....']; // online votes var onlineVotesArray = [21,47,23,11,56,47,30]; // paper votes var paperVotesArray = [12,4,20,11,5,4,17]; // total votes -- to be initialised below var totalVotesArray; // Add code to // -- initialise totalVotesArray with a new empty array of the same size as candidateArray // -- use a for loop to add the online and paper votes for each candidate and store the result at the corresponding position in the total votes array. is it possible to embed something like this Code: <object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' width='450' height='24'> <param name='movie' value='http://youtubemp3.tv/player/player.swf'> <param name='allowfullscreen' value='false'> <param name='allowscriptaccess' value='always'> <param name='wmode' value='transparent'> <param name='flashvars' value='file=http://youtubemp3.tv/mp3embed-oeduvhv516z9.mp3&duration='> <embed src='http://youtubemp3.tv/player/player.swf' width='450' height='24' allowscriptaccess='always' allowfullscreen='false' flashvars='file=http://youtubemp3.tv/mp3embed-oeduvhv516z9.mp3&duration=' /> </object> into a array that will randomly pull things from it like this Code: <input type = "button" value="Call Out a Target" onclick="myFunction()"></button>
<div id = "demo1"></div>
<div id = "demo2"></div>
<script type="text/javascript">
function shuffle(array) {
var n = array.length, k, t;
if (n == 0) {return false};
while (--n) {
k = Math.floor(Math.random() * (n+1));
t = array[n];
array[n] = array[k];
array[k] = t;
}
}
function myFunction() {
var myarray=["red","blue", "yellow", "orange"];
shuffle (myarray);
document.getElementById("demo2").innerHTML = myarray[0];
}
</script>
Thanks!!! Code: <script type="text/javascript">
var authors = ['Ernst Hemingway','Charlotte Bronte','Dante Alighieri','Emily Dickinson'];
</script>
<script type="text/javascript">
document.write('<p>The first author is <strong>');
document.write('authors[0] + '</strong> </p>');
</script>
I'm getting a syntax error on the last line ? I can't see the error, I closed the strong tag, closed the p tag. Put the line in a string, why won't it write the string ? This has been resolved. The moment i posted it i realised the mistake i was making . Learnig how to delete my post, until then thought i would sdimply delete the content.
Hi, I am trying to merge the values of 2 arrays. array 1 = 1, 2, 3, 4, 5 array 2 = a, b, c, d, e Resulting in: array 3 = 1-a, 2-b, 3-c, 4-d, 5-e etc both arrays that will be used originally will always of the same length. Both arrays will contain numbers Can you please help? Thanks Do arrays retain its data outside of a function. The reason why i asked this is because i created a global array and then a function. In the function i assaigned values to the global array but when i try to access the global array it gives me a "undefined" or "null" error. Code: var myArray = new Array();
var count = 0;
function populate(){
for(i=0; i < 5; i++){
myArray[i] = count++;
}
}
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