JavaScript - Getting First Digits In A Number
Ooook so this is probably the stupidest question ever. I know in java you can take advantage of a number being an int (not double) and divide by something without getting a remainder. But in javascript you dont declare what kind of variable something is.
So my problem is: Given any double or triple digit number, how do i get all but the last digit. Like if i have 13, I need to make an int with 1. If it's 103 i need one with 10. Thanks!! Similar TutorialsIf number is more than 24 digits, modulus operator is not giving correct output here attached sample code [code]<script type="text/javascript"> var a=10000000000000000000000.0; var b=10.0; var c=a % b; alert("c"+c); </script>[code] please tel me solution Hello all I'm trying to get this function to check for 10 digits only but alert shows regardless of less / more or exactly 10 digits --- what am I missing? any help on sorting this greatly appreciated. Code: function validate(form) { if (document.forms[0].callme.checked) { var phone = document.forms[0].mobile.value; // assign value to var phone = phone.replace( /[^\d]/g, "" ); // zap all non-digit characters if ( document.forms[0].mobile.length != 10 ) // chk for 10 digits{ alert("Enter 10 numbers"); return false; } else { alert("Yahoo"); } } low tech I have a number var number = 1,235.326232 I need to display it like following with the last 4 numbers in red. 1,235.32 6232 I have tried number.slice(0,-4)+"<font color='red'>"+number.substr(number.length-5,4); however it keeps messing up the comma and decimal placement. hi, i'm trying to keep a copy of a variable at 4 digits.. this is what i came up with.. it's working but i'm only a noob, so i would very like to know is there any other simpler and/or elegant way to do this.. also i would appreciate it if you could point out any bad syntax or something.. Code: page = 100 function makeit4digits(){ page4digit = page if (page<10) { page4digit = "000"+ page } else if (page<100) { page4digit = "00"+ page } else if (page<1000) { page4digit = "0"+ page } } Is it possible to convert the getTime() result into an actual number or text type format where the length function can be used to return only the last 2 digits of the number in a text or number format that is NOT a date format? I have spent quite a bit of time hunting for this and suspect that I am attempting the impossible ?? Thanx Disregard - I believe I have figured it out finally!! Hello, I've obtained the following code. Code: function makeDate(){ var d = new Date(); var strDate=d.getFullYear() + "/" + (d.getMonth()+1) + "/" + d.getDate() + " "; strDate += d.getHours() + ":" + d.getMinutes() +":"+ d.getSeconds() ; return strDate; and I think I'm going to get the time and date indications in 2 digits. I want to get it like this: 2009/12/07 18:07:33 NOT like: 2009/12/7 18:7:33 How should I alter the code? Can anyone help? Thanks in advance. Hi I would like to write a parser like the one below except I would like it to take characters with the the digits like 345j, 982p0, what would I change to be able to have characters with numbers? Code: ts.addParser({ id: "digit", is: function (s, table) { var c = table.config; return $.tablesorter.isDigit(s, c); }, format: function (s) { return $.tablesorter.formatFloat(s); }, type: "numeric" }); I have the following string "d3-23-76-546" I'm looking for a regular expression that will match everything in this string before 546 so that I can replace it with an empty string and just be left with 546. The string could be of any length and contain any number of hyphens. Hello, I am a hobbyist coder making a basic website for a friend, and I have a small problem. On an image slideshow, there is a counter at the bottom showing what image it is up to (ie 7/15), I'm not entirely sure how to change this into double digits (ie 07/15) I've found this thread (http://www.codingforums.com/showthread.php?t=212321) but am unsure how to integrate it into the slideshow I'm using, which is a different one. Here is the part from my JS I think that needs modifying: Code: if (setting.displaymode.type=="manual" && !setting.displaymode.wraparound){ this.paginatecontrol() } if (setting.$status) //if status container defined setting.$status.html(setting.curimage+1 + " / " + totalimages) Is this the right bit of code? If more of the code is needed to solve this please let me know. Any help is greatly appreciated! I am working on my personal portfolio site, and am using a code that will make each portfolio piece appear in a new div when the name of the piece is clicked on. The problem is, JS does not seem to recognize double digits. I am not familiar with JS at all, I just got comfortable with CSS/HTML a few weeks ago! I am in over my head. It would really, really help if someone could show me how to change the code so that I could make about 15 to 20 divs instead of 9. Here is the code: Code: <script language="JavaScript"> numdivs=9 IE5=NN4=NN6=false if(document.all)IE5=true else if(document.layers)NN4=true else if(document.getElementById)NN6=true function init() { showDiv(0) } function showDiv( which ) { for(i=0;i<numdivs;i++) { if(NN4) eval("document.div"+i+".visibility='hidden'") if(IE5) eval("document.all.div"+i+".style.visibility='hidden'") if(NN6) eval("document.getElementById('div"+i+"').style.visibility='hidden'") } if(NN4) eval("document.div"+which+".visibility='visible'") if(IE5) eval("document.all.div"+which+".style.visibility='visible'") if(NN6) eval("document.getElementById('div"+which+"').style.visibility='visible'") } </script> Thank you for taking the time to read this! Hopefully someone can help. I am using a great js gallery script from ....http://coffeescripter.com/code/ad-gallery/ they have a counter for the number of images shown, the number changes as user clicks on next bottom. from looking at the script, the counter is anchor to .ad-info and the counter code from the JS is ..... _afterShow: function() { this.gallery_info.html((this.current_index + 1) + ' / '+ this.images.length); if(!this.settings.cycle) { Can anyone help make the number show double digits only for the numbers 1,2,3,4,5,6,7,8,9 (example- 03/07 or 09/28 or 03/58).. etc..etc thanks for looking. So far I've logged forty hours in total trying to locate and fix the major problems in this code. I've worked with two other forums and a pay-by-minute guru to no avail. I am hopeful that the good folks here at CodingForums will be able to take this code the final distance. I'll try to be verbose without boring anyone. Summary: This code was written in 2005/2007 by "Wonder" at ProBoards. I teach a fourth grade game design and applied mathematics class to home-schoolers on a ProBoards forum. It is placed in the global footer of the forum to allow forum members to roll dice in their posts. The code was incomplete. I worked with "Jordan" at ProBoards to fix the parts that were incomplete. A problem with the code resulted. Primary resolution I'm seeking: Right now the code does everything I could possibly want. However, it is mistakenly reading double-digit numbers (XY) as X = sides of die and Y = a negative modifier. Once this issue is fixed, I can take the roller back to my students and they can game together. Secondary resolutions I'm seeking: (1) I've been told twice that the code should be "tabbed out." Not sure what that means but I guess it makes it less messy. (2) When clicking the "Add Tag" button the code generates, it automatically inserts [dice=6] into a forum post. Would love this to simply be [dice=X] The original code from "Wonder": Code: <style type="text/css"> .dicebg {background-color: FFFFFF;border:solid 2px #000000;} .dicefont {background-color: FFFFFF;color: 000000; font-weight:bold;} </style> <script> //Dice Rolls In Posts v1.1 updated 31 October 2008 //Copyright 4-23-2007 ~Wonder //May be reposted anywhere as long as this header remains in tact //Do you want the dice to line of horizontally(true) or vertically(false) diceAlignment=true; //Enter URL of the image you want to appear as the dice ubbc button UBBCdiceImage="http://img100.imageshack.us/img100/6118/diceicon9rx.gif"; //Enter the default # of sides defaultSides=6; //Enable dice in preview? true or false enablePreview=true; rs="";mainForm=""; if(document.postForm) { mainForm=document.postForm; if(location.href.match(/action\=modifypost/)){enablePreview=true;} mainForm.color.parentNode.innerHTML+="<a href=javascript:add(\"[dice="+defaultSides+"]\",\"\")><img src=\""+UBBCdiceImage+"\" alt=\"Insert Dice Roll\" border=\"0\"></a>"; mainForm.onsubmit=addRand; mainForm.message.value=mainForm.message.value.replace(/(\[rand\=\d+\])/ig,""); rs=RegExp.$1; rs=(/\[rand\=/.test(rs))?rs:""; if(location.href.match(/quote\=\d+/)) { mainForm.message.value=mainForm.message.value.replace(/(\[dice\=\d+\])/ig,""); rs=""; } } else if(location.href.match(/action\=display/)) { ta=document.getElementsByTagName("textarea"); if(ta.length>0 && ta[0].name=="message") { mainForm=ta[0].parentNode; mainForm.onsubmit=addRand; } } /////////////////////// if(location.href.match(/action\=(display|pmview|recent|userrecentposts|gotopost|search|calendarview)/) || (!location.href.match(/action\=/) && document.postForm && enablePreview)) { hr=document.getElementsByTagName("hr"); for(i=0;i<hr.length;i++) { if(typeof(hr[i].parentNode)!="undefined" && hr[i].parentNode.tagName=="TD" && typeof(hr[i].parentNode.lastChild)!="undefined" && typeof(hr[i].parentNode.lastChild.lastChild)!="undefined" && hr[i].parentNode.lastChild.lastChild.nodeType!=1) { n=hr[i].parentNode.lastChild; rand=n.innerHTML.match(/\[rand\=\d+\]/); if(rand!=null) { n.innerHTML=n.innerHTML.replace(rand[0],""); rand=rand[0].replace(/[^\d]/g,""); dice=n.innerHTML.match(/\[dice\=\d+(\+\d+)?\]/ig); if(dice!=null) { for(k=0;k<dice.length;k++) { numb=dice[k].match(/\d+(\+\d+)?/); numb=numb[0].split("+"); addon=numb.length>1?parseInt(numb[1],10):0; numb=parseInt(numb[0],10); roll=Math.round((parseFloat(rand.substring(k,k+2)+"."+rand.substring(k+2,rand.length))/100)*(numb-1))+1+addon; n.innerHTML=n.innerHTML.replace(dice[k],"<table "+(diceAlignment?"style=\"display:inline\"":"")+" border=0 cellpadding=0 cellspacing=0><tr><td><table class=dicebg cellpadding=1 cellspacing=0><tr><td><center><font class=dicefont size=\"+1\"><b>"+roll+"</b><br><font size=\"1\">"+numb+" sides"+(addon>0?"+"+addon:"")+"</font></font></center></td></tr></table></td></tr></table> "); } } } } } } function addRand() { mainForm.message.value=mainForm.message.value.replace(/(\[rand\=\d+\])/ig,""); if((rs.length==0 && mainForm.message.value.match(/(\[dice\=\d+(\+\d+)?\])/)) && (enablePreview==true || (enablePreview==false && mainForm.nextaction.value=="post"))) { mainForm.message.value+="[rand="+(Math.random()+"").replace(/0\./,"")+(Math.random()+"").replace(/0\./,"")+(Math.random()+"").replace(/0\./,"")+( Math.random()+"").replace(/0\./,"")+"]"; } else { mainForm.message.value+=rs; } disable(mainForm); } </script> The altered code from "Jordan": Code: <style type="text/css"> .dicebg {background-color: FFFFFF;border:solid 2px #000000;} .dicefont {background-color: FFFFFF;color: 000000; font-weight:bold;} </style> <script> //Dice Rolls In Posts v1.1 updated by Jordan October 2009 //Copyright 4-23-2007 ~Wonder //May be reposted anywhere as long as this header remains in tact //Do you want the dice to line of horizontally(true) or vertically(false) diceAlignment=true; //Enter URL of the image you want to appear as the dice ubbc button UBBCdiceImage="http://img100.imageshack.us/img100/6118/diceicon9rx.gif"; //Enter the default # of sides defaultSides=6; //Enable dice in preview? true or false enablePreview=true; rs="";mainForm=""; if(document.postForm) { mainForm=document.postForm; if(location.href.match(/action\=modifypost/)){enablePreview=true;} mainForm.color.parentNode.innerHTML+="<a href=javascript:add(\"[dice="+defaultSides+"]\",\"\")><img src=\""+UBBCdiceImage+"\" alt=\"Insert Dice Roll\" border=\"0\"></a>"; mainForm.onsubmit=addRand; mainForm.message.value=mainForm.message.value.replace(/(\[rand\=\d+\])/ig,""); rs=RegExp.$1; rs=(/\[rand\=/.test(rs))?rs:""; if(location.href.match(/quote\=\d+/)) { mainForm.message.value=mainForm.message.value.replace(/(\[dice\=\d+\])/ig,""); rs=""; } } else if(location.href.match(/action\=display/)) { ta=document.getElementsByTagName("textarea"); if(ta.length>0 && ta[0].name=="message") { mainForm=ta[0].parentNode; mainForm.onsubmit=addRand; } } /////////////////////// if(location.href.match(/action\=(display|pmview|recent|userrecentposts|gotopost|search|calendarview)/) || (!location.href.match(/action\=/) && document.postForm && enablePreview)) { hr=document.getElementsByTagName("hr"); for(i=0;i<hr.length;i++) { if(typeof(hr[i].parentNode)!="undefined" && hr[i].parentNode.tagName=="TD" && typeof(hr[i].parentNode.lastChild)!="undefined" && typeof(hr[i].parentNode.lastChild.lastChild)!="undefined" && hr[i].parentNode.lastChild.lastChild.nodeType!=1) { n=hr[i].parentNode.lastChild; rand=n.innerHTML.match(/\[rand\=\d+\]/); if(rand!=null) { n.innerHTML=n.innerHTML.replace(rand[0],""); rand=rand[0].replace(/[^\d]/g,""); dice=n.innerHTML.match(/\[dice\=\d+((\+|\-)\d+)?\]/ig); if(dice!=null) { for(k=0;k<dice.length;k++) { numb=dice[k].match(/\d+((\+|\-)\d+)?/); numb=numb[0].split(RegExp.$2); unsigned = (RegExp.$2 == "+") ? true : false; addon=numb.length>1?parseInt(numb[1],10):0; if(!unsigned)addon = addon - addon * 2; numb=parseInt(numb[0],10); roll=Math.round((parseFloat(rand.substring(k,k+2)+"."+rand.substring(k+2,rand.length))/100)*(numb-1))+1+addon; n.innerHTML=n.innerHTML.replace(dice[k],"<table "+(diceAlignment?"style=\"display:inline\"":"")+" border=0 cellpadding=0 cellspacing=0><tr><td><table class=dicebg cellpadding=1 cellspacing=0><tr><td><center><font class=dicefont size=\"+1\"><b>"+roll+"</b><br><font size=\"1\">"+numb+" sides"+(addon>0?"+"+addon:addon)+"</font></font></center></td></tr></table></td></tr></table> "); } } } } } } function addRand() { mainForm.message.value=mainForm.message.value.replace(/(\[rand\=\d+\])/ig,""); if((rs.length==0 && mainForm.message.value.match(/(\[dice\=\d+((\+|\-)\d+)?\])/)) && (enablePreview==true || (enablePreview==false && mainForm.nextaction.value=="post"))) { mainForm.message.value+="[rand="+(Math.random()+"").replace(/0\./,"")+(Math.random()+"").replace(/0\./,"")+(Math.random()+"").replace(/0\./,"")+( Math.random()+"").replace(/0\./,"")+"]"; } else { mainForm.message.value+=rs; } disable(mainForm); } </script> My incredibly detailed account of my last few weeks with this code: Back in 2005, a user named "Wonder" wrote a nifty piece of code that fits into any ole ProBoard's global footer. Once installed on a forum, it allows users to type the command [dice=X] where X is the number of sides for the single die they want to roll and it gives them a random result that's very attractive (a small white box with a black border and a bold, large result with smaller text below that reads: Xsides) and not "easy" to change/alter/cheat. To roll more than one die, you simply string the command like [dice=X][dice=X][dice=X][dice=X]. The code also allows for positive modifiers (bonuses) such as [dice=X+Y] where the result has the same compact, attractive format and the small text reads: Xsides+Y Wonder posted that his code would also allow negative modifiers (penalties) but, actually, no one seems to have ever tested that part... until September 2009 when along came pesky me. I went over to the ProBoards support forum because Wonder's code is included in their official database. I posted the problem and a user named Jordan tweaked the code several times, each time getting it closer to providing the correct result. The correct result being that when a user types the command [dice=X-Y] the result is the attractive box, the larger number above and the smaller text below that reads Xsides-Y (in addition to continuing to accept [dice=X] and [dice=X+Y] and offer the same format of results). Jordan's version of the code now does all this. But when I started testing it I realized that whenever a user types a command that gives the die double-digit sides (10, 12, 20, etc), the code now reads it like this: [dice=10] results in 1sides-0 or [dice=12] results in 1sides-2. So double-digit numbers are being read as the number of sides and a negative modifier *sigh* Very bad news. Jordan needed to pass on further work on the code because (understandably) it was taking too much time and it was "messy." Since I am not a coder myself, most JavaScript looks messy to me but I believe Jordan. I then took the code to a pay-by-minute help website but was gently told that the code was so messy that it would take too long to debug and it wouldn't be worth the charge since the roller is being used for a non-profit classroom project for my fourth graders. I thought that was very thoughtful... but I'm back at square one, really. I have attached everything I have: The very original code from Wonder (the one that doesn't read negative modifiers at all) and the latest from Jordan (that reads double-digits incorrectly). The only other cute/attractive thing about the code that I'll point out (so you don't see it in the code and wonder, "What the heck is that?" is: When you install the code into a forum, it adds a tiny die-shaped button to the Add Tags menu. Users can click the little thing and the code automatically inserts [dice=6] for them. Personally, this doesn't help my students and I would love it if the button just inserted [dice=X] but that's fine. *deep breath* Whew! That's about it. Thank you for putting up with my blather. I sincerely appreciate any help you can offer. I know your time is valuable and I've taken quite a bit just posting my full report... I just wanted to try to be verbose :) Jennifer 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: 1: 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: Code: function insertQuestion(form) { var row = document.createElement("tr"); var cell, input; cell = document.createElement("td"); cell.className = "weight"; input = document.createElement("input"); input.name = "weight_" + qnum; input.onkeypress = "return isNumberKey(event)"; cell.appendChild(input); row.appendChild(cell); } 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?
I am delving into the coding world and while I understand the basic principle of cookies, conditional statements, arrays, etc... I am still learning how to properly implement them. Any asistance with the following situation would be greatly appreciated and help with my learning as I try to reverse engineer the logic. I have looked around the web and this forum with little success. If the situation below is too complicated, I would really appreciate even a shove in the right direction regarding the logic. ----------------- How could I show a preset counter which counts up from a preset, beginning number toward a preset, end number? I imagine the increment and speed is set be the difference between the two numbers and a timeframe. Assumptions: I would rather not set the increment but edit the end number to show a steady increase. As I update that number, the increment adapts dynamically. I would want the number/script to be useful, so it should not refresh to the beginning number on each page load (i.e. num=0). When a visitor comes to the page, it must seem like the counter has been steadily been increasing in their absence. Coke or Pesi did something similar one time regarding cans sold to date (doubt it was plugged into a DB somewhere but rather based on a steady sales figure) and it was pretty cool. All the best! I need help on some code
Code: function makefarm(){ document.getElementById("farms").value ++ ; document.getElementById("pop").value -=2 ; document.getElementById("coin").value -=10 ; document.getElementById("lumber").value -=20 ; document.getElementById("CIfarm").value ++ ; document.getElementById("CIfarm").value ++ ; document.getElementById("CIfarm").value ++ ; document.getElementById("CIfarm").value ++ ; document.getElementById("CIfarm").value ++ ; } function upgradefarm(){ document.getElementById("iron").value -=5 ; document.getElementById("coin").value -=20 ; document.getElementById("farmupgrades").value ++ ; } var food = function () { var f1 = document.getElementById('buttonhere'); var f2 = '<input type="button" value="Make Farm" onclick="makefarm()" /> Farms:<input type="text" id="farms" size="1" value=0 style="background-color:transparent;border:0px solid white;" READONLY/> <input type="button" value="Upgrade Farm" onclick="upgradefarm()" /> Farm Upgrades:<input type="text" id="farmupgrades" size="1" value=0 style="background-color:transparent;border:0px solid white;" READONLY/> <br/><br/><br/> Current Income:<input type="text" id="CIfarm" size="1" value=0 style="background-color:transparent;border:0px solid white;" READONLY/>'; f1.innerHTML = f2; } Code: Coin:<input type="text" id="coin" value=50 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> Lumber:<input type="text" id="lumber" value=100 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> Iron:<input type="text" id="iron" value=25 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> Food:<input type="text" id="food" value=100 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> POP:<input type="text" id="pop" value=10 size="1" style="background-color:transparent;border:0px solid white;" READONLY /> so if i press the makefarm() button it will add to the numbers but if i press it again they will got to zero how could i make it remember the numbers?(the input boxes are the second code) I have a dynamic form that uses Code: var input_box = $("<input type=\"text\" id=\"ac\" >") I need to have a unique id for each input that is displayed. How can I do this? I can't use vars or anything in there as variables don't work in this as it is? Hello, I need to be able to get a number to 2dp without rounding e.g. 14.756 needs to be 14.75 I tried .toFixed(2) but this rounds. I thought of converting to a string and performing string functions but it seems like over kill if there is an easier way. thanks I need to write something like this: http://justsheri.com/webscripting/wsassignment/1049950/ If you look at the code there is 52 of these <img src = './images/blank1.png' onClick='clickCard("qh",0)'/> where clickcard("numchanges", increments by 1) how is this done? Thanks Danny |