Finding If Numbers In A Set Add Up To Another Given Number?
Aug 10, 2009
I have what I thought was a fairly simple problem that I would be able to solve on my own, but the code I have found is just too complicated for me to understandI think what i have is similar to the knapsack problem, but I have a really simple version of/~moshe/recor/knapsack/knapsack.html#defSay I have a relatively small array of numbers:2, 2, 3, 3, 4, 4, 5, 5, 5, 6, 7, 8, 9, 10. I just need to verify true or false if a combination of these numbers will add up to 21. The numbers will obviously be changing, ( and in array size), i guess i could just use if statements but it would be stupid and go on for ages.Could anyone point me in the direction of some simple code, or easy to understand way to go about this problem?
I'm writing a function multiple that determines, for a pair of integers, whether the second one is a multiple of the first. The function has to take two integers and return true if the second is a multiple of the first. I have two text fields and a button to initiate the calculation but I can't get the numbers to relate to each other.
I'm having a hard time trying to get this script to work. I am trying to write a script that finds the highest of 5 numbers and places the highest number in the last textbox.Can anybody tell me what I am doing wrong?
<HTML> <HEAD> <TITLE>COMSC-100-1241 - Assignment #10 - Using "Greater Than" And "Less Than" Logic</TITLE>
How can I check if a number exists by itself in this string by using the RegExp object?
var mystring = "11,111,01,011"; var match = "1"; var re = new RegExp( match ); var isFound = re.test( mystring ) );
Running this code returns 'true' which is not what I want since number one doesn't exist by itself. I need to use the "match" variable since it will change depending on user input.
I can only get it to work without variables in the expression. E.g.
I have a number of elements on a page, which I want to remove. The number changes depending on the number of the results,ie. div Id like result1, result2, result3 etc.Is there a way for me to find out the number of items called resultX or is there a way for me to search through all ID's like result ?
What would be the easier way to do this? For each of the list elements I want to check how many image elements are inside each, and do something with the one that has only one image.
I want to build a web form that will allow users to enter 3 different numbers and get a result. The answer is arrived at by the following. Enter 3 variable A, B, and C. Then A / B = D. Then C / D = the Answer.Is there a way to set that up as a single click script? Everything I have tried has failed hard.:mad:
have a form with three fields for home phone, work phone & mobile phone.I've got jquery to validate that the numbers entered are the right format, i.e. using the following with custom methods for the phoneUK etc.The thing is I only need one of these numbers. I have been trying *all day* to try and get this to work but no joy. I know I need to group them somehow but can't figure it out.I want it so I get a single message if all fields are left empty and then if a field does have an entry then it's validated to ensure its a number.
I have a list of sequential numbers here. How can i show the 5 numbers infront and behind a clicked number?e.g. When i clicked on the number 0, this is the situation:5 4 3 2 1 0 -1 -2 -3 -4 -5So when i clicked on the number 2, it should show like this:7 6 5 4 3 2 1 0 -1 -2 -3
I have been presented with: Draw a flowchart and write a javascript program which will accept two numbers from a user and will determine whether the second number is a factor of the first. This is determined by dividing the first number by the second and checking if the remainder is 0. This is made easier if you find out what the operator does. The output should be in the form 4 is not a factor of 6 and 3 is a factor of 6. I have tried a few attemps and yet still not sure what the problem is :confused:
I have this script that is supposed to check if a number the user guesses is the same as the randomly generated number.Problem is that the random number generated at the start of the program keeps on changing everytime I click on the "Check if I'm right" button, the random number gets generated again and I never ever get to reach the correct answer
HTML CODE <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head>
Hello everyone... I've got a question about an onKeyUp event. I'm using a text box that HAS to be a negative number therefore it has to have a - sign in front of the number. Can someone point me in the right direction as to how to write a function to do this? Thanks so much...
I am working on trying to create a Picture Bingo JavaScript. I am using the standard Bingo Card Generator and it works great however, I need help coding the script so that the number are associated with a picture for example everytime number 12 would show up on the card an image would replace the number. Here is the code that I am using:
When updating our agency's webpage daily, [URL] I am looking for a shortcut to save time.. When I update air quality numbers. I have to put the conditions. Ex.. 50 = good 100= moderate etc etc. As you see here(bold and underlined)
[Code]...
Well instead of having to type good or moderate every-time to correlate with the numbers, I want to find a way the category can automatically default correctly when I put in just the number. Ex, if I put in the number 100, it automatically knows to issue/ put Moderate with out me having to type it. I semi wrote a code .. Yet can't seem to know how to execute. Seeing if Maybe I can get some assistance.
I have a function below where every time a question is submitted, it will add a new row in the table with a textbox which allows numbers entry only. My question is that I don't know how to code these features in this function:
I want the text box to be between 0 and 100, so if text box contains a number which is above 100, it will automatically change the number to the maximum number which is 100.
Does any one know how to code this in my function below in javascript:
When I used toFixed() method on a number, I thought that this method round a number to a specified approximation, but I got a surprising result, the number became string! 15.23689.toFixed(2) ==> "15.24". So does it convert the number into string?
I am trying to figure out how to make a random number I can plug into a script count down from that number at certain times of the day until it reaches 0. I would like it to reset itself at midnight every day. I'm trying to make it work with a script I found on here that resets itself at midnight every day. So instead of it counting down too fast, it would count down to the next number after a randomly generated number of minutes until it reaches 0. But it wouldn't necessarily have to end at 0 at midnight. It could go from 845 to 323 at the end of the day at a slower pace. Is that possible?
What i'm trying to do is replacing the size=180 part of the src (in this case an image) with size=400 so that the images appear larger. I can't simply replace any "180" with "800" because the value might be present in the lid or isbn.So far I've pretty much cut the url up in pieces (I reckon it could be done a lot easier), but I'm stuck with replacing it.[code]
So if the user on my website types 52 it would return the following value: 5<sup>2</sup>, or just, 5 how do I detect something like this. if they enter: 5 how can I detect the number "2" and put it superscripted past the number 5. so the javascript reads this: 5 and returns this: 5<sup>2</sup>
I'd like to make a Degree object that inherits from the Number object and uses the Number constructor but adds a .rad() method that returns the value in radians.
If I do something like:
It generally works but I don't get Number's methods like toString and toPrecision.
I have a div, which can be anywhere in the document. I want it like, when I click anywhere on the div, it tells me the X, Y of the mouse in the div. Like X mouse - X div (left) and Y mouse - Y div (bottom). So that I know the width and height of the mouse according to the div. Is it possible or cross browser?
