javascript - Array converted into a string is used to be converted into a number but does not work -


i building calculator html, css , and pure javascript. tried little information, cannot understand happening now. since person type many digits (i.e 456) create number , click on operator, decided create array(arrayinput) hold numbers 4,5,6 , character "." instance 4.56 in array appears 4,.,5,6 removed characters , whitespaces. since string "4.56" used number() function convert number. used parseint, parsefloat, displays first time , when operator selected, not calculate total, remains total zero. appreciate support.

<!doctype html> <html> <head>   <meta http-equiv="content-type" content="text/html; charset=utf-8">   <title> - jsfiddle demo</title>    <style type='text/css'>     .row{     height: 2em;     width: 25%;     border: 0.05em solid black;     float:left;     font-size: 2em;     font-style: sans-serif;     text-align:center;     padding:0; } #screen{     height: 4em;     width: 100%;     border: 0.03em solid black;     float:left;     font-size: 3em;     font-style: sans-serif;     text-align:right;     margin:0;     padding:0;  }     </style>    <script type='text/javascript'>  var total=0;  //which replace number1 in parameters var numberarray=[]; var operator="plus";  //by default give addition var number=0; //get digits buttons create number want use  var performoperator=function (tot,num,ope){         if(ope==="plus")             {             tot+=num;             num=0;             document.getelementbyid("screen").innerhtml = tot;  //display number of total             }         else if(ope==="-")             {             tot-=num;             num=0;             document.getelementbyid("screen").innerhtml = tot;  //display number of total             }          else if(ope==="multiply")             {             tot*=num;             num=0;             document.getelementbyid("screen").innerhtml = tot;  //display number of total             }         else if(ope==="/")             {             tot/=num;             num=0;             document.getelementbyid("screen").innerhtml = tot;  //display number of total             }         else if(ope==="equal")             {             document.getelementbyid("screen").innerhtml = tot;  //display number of last total             num=0;             }         else if(ope==="clear")             {             tot=0;             num=0;             document.getelementbyid("screen").innerhtml = tot;  //display number of total             }     }   function getdigit(elemid){       var digitentry=document.getelementbyid(elemid).value; //digit value goes "val"     numberarray.push(digitentry); //each val should go push array     var numberwithspace=numberarray.join(' '); //convert array string block spaces     var numbernospace=numberwithspace.replace(/\s/g, '');  //string number no space     number=number(numbernospace);// should converter number here not like..     document.getelementbyid("screen").innerhtml = number;  //probably displays array of number string   }  function highlightsign(elemid){      var sign=document.getelementbyid(elemid).value; //digit value goes "sign""     operator=sign;     performoperator(total,number,operator); //call performoperator function , creates new total , new number 0     numberarray=[]; //once number created real number array used built clears }    </script>   </head> <body>   <body>      <p id="screen"></p>      <button id="nc" class="row" value=""></button>     <button id="pmsign" class="row" value=""></button>     <button id="npercentage" class="row" value=""></button>     <button id="divide" class="row" value="/" onclick="highlightsign(this.id)">/</button>     <button id="n7" class="row" value=7 onclick="getdigit(this.id)">7</button>     <button id="n8" class="row" value=8 onclick="getdigit(this.id)">8</button>     <button id="n9" class="row" value=9 onclick="getdigit(this.id)">9</button>     <button id="opx" class="row" value="multiply" onclick="highlightsign(this.id)">x</button>     <button id="n4" class="row" value=4 onclick="getdigit(this.id)">4</button>     <button id="n5" class="row" value=5 onclick="getdigit(this.id)">5</button>     <button id="n6" class="row" value=6 onclick="getdigit(this.id)">6</button>     <button id="minus" class="row" value="-" onclick="highlightsign(this.id)">-</button>     <button id="n1" class="row" value=1 onclick="getdigit(this.id)">1</button>     <button id="n2" class="row" value=2 onclick="getdigit(this.id)">2</button>     <button id="n3" class="row" value=3 onclick="getdigit(this.id)">3</button>     <button id="plus" class="row" value="plus" onclick="highlightsign(this.id)">+</button>     <button id="n0" class="row" value=0 onclick="getdigit(this.id)">0</button>     <button id="clear" class="row" value="clear" onclick="highlightsign(this.id)">clear</button>     <button id="decpoint" class="row" value="." onclick="getdigit(this.id)">.</button>     <button id="equal" class="row" value="equal" onclick="highlightsign(this.id)">=</button> </body>  </body>   </html>

i made total work here. need change logic of calculator. there's lot change there

http://jsfiddle.net/g6gj1kr6/9/

don't pass total parameter make global, can rewrite it. 

var tot=0;

anyway, there lot of work calculator


Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

php - Nothing but 'run(); ' when browsing to my local project, how do I fix this? -

i added new project. made mistake in projectname.conf file in sites-available apache2, led me reinstalling apache2. after reinstalling , re-enabling projects on every page of every project .. <body> run(); </body> .. i've run composer update, restarted service, restarted pc, checked config files, tried disabling new project. there nothing in error log, , access.log: 127.0.0.1 - - [15/may/2015:01:40:47 +0200] "get / http/1.1" 304 181 "-" "mozilla/5.0 (x11; ubuntu; linux x86_64; rv:38.0) gecko/20100101 firefox/38.0" maybe i'm forgetting apache2 reinstall? don't think did different last time installed it. looks haven't setup php correctly. take @ this great guide , maybe you're forgetting link php config apache2.
Read more

php - How can I echo out this array? -

i don't know how go grabbing data in variable , put foreach loop. class tree{ private $info = array( array('name'=>'jim','state'=>'nu','company'=>'nu','phone'=>array('cell'=>'5615111111','office'=>'5611111111'),'email'=>array('primary'=>'exs@example.com','ex@there.com')), array('name'=>'joe smith','city'=>'phoenix','phone'=>'4805551111','email'=>'jsmith@some_email.com'), array('name'=>'john doe','city'=>'chandler','company'=>'doe co.','email'=>array('jdoe@gmail.com','personal'=>'email@email.com'),'phone'=>'6025550002') ); } if you're inside of class, can access private variable using $this->variablename . example, i...
Read more