JavaScript realizes nine Sudoku addition numerical equivalence _javascript technique

In this paper, we introduce the corresponding method of JavaScript to realize nine Sudoku, and share them for everyone's reference, the specific contents are as follows

Realize the idea:
1, each lattice input value must be a number;

2, the input value can not be repeated;

3, the input value can not be less than 1 or greater than 9;

4, the value can not be empty;

5, add a total of 8, respectively, three horizontal, vertical three, two diagonal two values. Details are as follows:

Explain:

Identified by the marked serial number of each lattice:

Transverse three values: 0-2,3-4,6-8;

Longitudinal three values: [0,3,6], [1,4,7], [2,5,8];

Diagonal two values: [0,4,8], [2,4,6]

Implementation process:
Very simply, like the picture above, click the Submit button to start judging.

1, layout
HTML section:

<div class= "box" >
  <input type= "text" >
  <input type= "text" >
  <input type= "text" >
  <input type= "text" >
  <input type= "text" >
  <input type= "text" >
  <input type= " Text ">
  <input type=" text ">
  <input type=" text ">
  <button> submit </button>
</div>

CSS section: implemented through CSS3 properties.

*{margin:0;padding:0;outline:none;}
html,body{
  height:100%;
  Display:flex;
  Justify-content:center;
  Align-items:center
}
. box{
  position:relative;
  width:250px;
  margin:0 auto;
}
input{
  Text-align:center;
  font:40px/60px ' Microsoft Yahei ';
  width:30%;
  Float:left;
  Box-sizing:border-box
}
button{
  position:absolute;
  bottom:-30px;
  left:50%;
  Margin-left: -30px;
  width:40px;
}

2, the next key to the JS section
Previously said JS implementation of the method, is related to the code.

var obtn=document.getelementsbytagname (' button ') [0], ainp=document.getelementsbytagname (' input '); 
  function Isnum () {var atemp=[];//creates a temporary function that holds the number for (i=0;i<ainp.length;i++) {var val=number (Ainp[i].value) in the nine grid one time;
  　　if (isNaN (val) | | | val<1 | | val>9) {//Determine if the value in the current input box is a number, is less than 1, is greater than 9?
  　　Alert (' 1, you can only enter 1-9 pure digits; 2; cannot be empty; '); Return false;//If you satisfy any of the conditions of the direct exit function does not go down} for (s=0;s<atemp.length;s++) {///loops to determine whether there are duplicate values in the nine, if there is a repeat directly eject the function if (val = = Atemp[s
  　　　　] {alert (' cannot repeat input! ');
  　　return false;
　　}///The above judgment is satisfied, place the value of the current Val in the array atemp Atemp.push (val); //n the following numbers correspond to the values of each lattice mark on the above picture//the horizontal and vertical values are set to 0, where n1-n3 is three values horizontally, N4-N6 is three values in portrait value var n1=0,n2=0,n3=0,n4=0,n5=0,n6=0,//n7, N8, respectively
　　Two diagonal values n7=atemp[0]+atemp[4]+atemp[8], n8=atemp[2]+atemp[4]+atemp[6];
　　Transverse: piecewise addition value for (i=0;i<3;i++) n1+=atemp[i];
　　for (i=3;i<6;i++) n2+=atemp[i];
　　for (i=6;i<9;i++) n3+=atemp[i];
Portrait: Because the portrait is added once every two squares, it is calculated for (i=0;i<9;i++) {(i%3==0) && (n4+=atemp[i) by the mode of modulo (0, 3, 6, respectively).  (i%3==1) && (N5+=atemp[i])///when i%3=1, Lattice 1, 4, 7 (i%3==2) && (n6+=atemp[i));//When i%3=1, Lattice 2, 5, 8} respectively  Determine whether the values of n1-n8 are equal, of course, can be any one n judgments, not limited to N1 values equal n1==n2 && n1==n3 && n1==n4 && n1==n5 && n1==n6 && n1==n7 && n1==n8? Alert (' Congratulations on your input right! : Alert (' Sorry you entered the error!
');
 } obtn.onclick=isnum; execution effect

1, when the input value is not a number, or greater than 9, or less than 0, or empty

2. When you enter a duplicate number

3. When the input is correct

The above is the entire content of this article, I hope to learn JavaScript program to help you.