javascript - Stopping a function, Arrays, and Integer Check -

-

so made code creating 5 ships in battleship game. succesfully made code layed out players ships. had no bugs. had player write out cords wanted position ship. write in ship position corresponding part in 2 dimensional array game map.. of course cords had integers or crash , burn.

so made check if coordinate integer before doing else. if wasn't restart function making rest of function wouldn't run. if write in numbers correctly there no problems. problem if don't write in number function restart function or part of must still running because ship gets written array no reason. cords haven't been specified have no clue how can possible.

here code made checking if integer , restarting function.

userytest = parseint(prompt("horizontal coordinate position first unit of ship")); userxtest = parseint(prompt("vertical coordinate position first unit of ship"));          if(userxtest % 1 === 0 && userytest % 1 === 0) {             usery = userytest-1;             userx = userxtest-1;             direction = prompt("now choose direction want rest of ship face.  may   use words left, right up, or down.").tolowercase();          }         else{             window.alert("you must enter number between 1 , ten 2 coordinates.");             ship(); //ship name of function         }

here code.

//these different game boards need keep track of. 2 possible values in each position 1 or 0 var user = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]]; var cpu = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]]; var userguessed = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]]; var userhit = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]]; var cpuguessed = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]]; var cpuhit = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]];  var clearboard = [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0]];  // these used set left game board. // counted 10 10 - should 10 10 var usery = 0; var userx = 0; var cpux = 0; var cpuy = 0; var cpudir = 0; var cpuwork = false; var direction = ""; var isthere = false; var i=0; var userxtest; var userytest;  // in battleship, there 1x5 length ship, 1x4 length ship, 2 1x3 length ship, , 1x2 length ship. down checks how many units covered see if have ships. later need add ships down shape   //user add ships here 1 one.  if can think of better have go @ it!  for(i=0;i<4;i++){     if (i===0){         window.alert("we placing 1 5 length ship.  take note playing on 10 10 board.");         ship();     }     if (i===1){         window.alert("we placing 1 4 length ship.  take note playing on 10 10 board.");         ship();     }     if (i===2){         window.alert("we placing 2 1 3 length ships.  take note playing on 10 10 board.");         ship();         ship();     }     if (i===3){         window.alert("we placing 1 2 length ship.  take note playing on 10 10 board.");         ship();     }     function ship(){         userytest = parseint(prompt("horizontal coordinate position first unit of ship"));         userxtest = parseint(prompt("vertical coordinate position first unit of ship"));          if(userxtest % 1 === 0 && userytest % 1 === 0) {             usery = userytest-1;             userx = userxtest-1;             direction = prompt("now choose direction want rest of ship face.  may   use words left, right up, or down.").tolowercase();          }         else{             window.alert("you must enter number between 1 , ten 2 coordinates.");             ship();         }         //making sure ship fit , nothing there!         if ((usery+4-i)>9 && direction=== "down"){          window.alert("you close down edge of board that. restarting...");          ship();         }         else if ((usery-4-i)<0 && direction=== "up"){          window.alert("you close edge of board that. restarting...");          ship();         }         else if ((userx+4-i)>9 && direction=== "right"){          window.alert("you close bottom edge of board that. restarting...");          ship();         }         else if ((userx-4-i)<0 && direction=== "left"){          window.alert("you close top edge of board that. restarting...");          ship();         }         else if (user[usery][userx] === 1) {             window.alert("coordinate used. please try again");             ship();         }           else if (user[usery][userx] === null || user[usery][userx] === ""){             window.alert("that coordinate isn't on board. restarting...");             ship();         }          else if(direction ==="left" || direction ==="right" || direction ==="up" || direction ==="down") {             for(var a=1; a<5-i; a++){                  if(direction=== "down"){                     if(user[usery+a][userx] === 1){                         window.alert("can't place ship in direction, ship in way.");                         isthere=true;                     }                 }                 if(direction=== "up"){                     if(user[usery-a][userx] === 1){                         window.alert("can't place ship in direction, ship in way.");                         isthere=true;                     }                 }                 if(direction=== "right"){                     if(user[usery][userx+a] === 1 ){                         window.alert("can't place ship in direction, ship in way.");                         isthere=true;                     }                 }                 if(direction=== "left"){                     if(user[usery][userx-a] === 1){                         window.alert("can't place ship in direction, ship in way.");                         isthere=true;                     }                 }                 if(isthere===true){                     isthere = false;                     ship();                      return false;                 }                 else{                     user[usery][userx] = 1;                 }             }          }         else{             window.alert("sorry didn't type in direction wanted ship go correctly. restarting...");             ship();         }           // building ship 1x5         for(var b=1; b<5-i; b++){              if (direction==="left"){                 user[usery][userx-b] =1;             }             else if (direction==="right"){                 user[usery][userx+b] =1;             }             else if (direction==="up"){                 user[usery-b][userx] =1;             }             else if (direction==="down"){                 user[usery+b][userx] =1;             }         } }  }  console.log(user);

first, understand calling function within not stop running original function. try this (jsfiddle) see how works:

var = 0; function askdogsname() {     var dogsname = prompt("what dog's name?");     if (dogsname != "rover") {         askdogsname();     }     i++;     document.body.innerhtml += "i = " +         + "; dog's name: " + dogsname + '<br />'; } askdogsname();

after new recursion of function has completed, original 1 carries on left off; not 'restart'. not way of responding user input not valid, because using global variables. each recursion of function can alter variables in way can become difficult predict, before returning control 'parent' (the recursion of function called it).

what can instead use return values check whether correct input has been given or not:

function ship() {      var c;      while (!c) {          c = getvalidcoords();      }      x = c[0];      y = c[1];      // make ship @ x, y  }  function getvalidcoords() {      y = parseint(prompt("horizontal coordinate position first unit of ship"));      x = parseint(prompt("vertical coordinate position first unit of ship"));      // conduct various tests on x , y      if (testsfail) {          return false;      }      return [x, y];   }

Comments

Post a Comment

Popular posts from this blog

css - Which browser returns the correct result for getBoundingClientRect of an SVG element? -

-
this svg contains rect overflows svg element: <svg id='svg' width='10' height='10'> <rect x='-10' y='-10' width='30' height='30'/> </svg> chrome 28 , opera 12 return getboundingclientrect() svg element width , height of 10. firefox 23 reports width , height of 30. correct? jsfiddle the relevant spec cssom , delegates svg spec if svg element not "have associated css layout box". haven't found definition of "having associated css layout box", correct result seem hinge on definition, getbbox returns 30x30 rect in browsers. this firefox bug fixed now, fix in firefox nightlies , should make through firefox 33 released on 14 october 2014. see bug 530985 details.
Read more

gcc - Calling fftR4() in c from assembly -

-
i trying asm fft implementation www.embeddedsignals.com work. running make gives error: undefined reference fftr4(short*, short*, int) at top of asm have .syntax unified .thumb .global fftr4 .type fftr4, %function and there #define's associate c functions arguments registers followed macros fftr4 function uses. after that, fftr4 called .thumb_func fftr4: stmfd sp!, {r4-r11, lr} mov tmp0, #0 // bit reversed counter mov tmp1, #0 .word 0xf3a2fa92 //rbit r3,r2 //rbit r,n lsl r,#3 and c code follows: void fftr4(short *y, short *x, int n); short x[512]; short y[512]; int i; void loop() { (i=0;i<512;i++) x[i]=0; (i=0;i<512;i=i+8) { x[i+0]=16384; x[i+2]=16384; x[i+4]=-16384; x[i+6]=-16384;} fftr4(y, x, 256); serialusb.println(y[128]); serialusb.println(y[129]); serialusb.println(y[384]); serialusb.println(y[385]); // expected results: //y[128]is 8191; y[129] -8190 y[...
Read more

.htaccess - Matching full URL in RewriteCond -

-
i'm trying block post access site (and return 403), except 2 ip's , 1 url ( http://mydomain.com/about-us/contact-us/ ). here's have: rewritecond %{request_method} post rewritecond %{remote_addr} !=1.2.3.4 rewritecond %{remote_addr} !=4.3.2.1 rewritecond %{request_uri} !^http://mydomain.com/about-us/contact-us/$ rewriterule ^ / [f] these rules allowing access ip properly, contact page still not accessible. i'm not sure i'm using request_uri correctly? i've tried variations relative urls rewritecond %{request_uri} !^/about-us/contact-us$ , rewritecond %{request_uri} !^/about-us/contact-us/$ without luck. what doing wrong please? it looks me rule on file name specific. if relax bit, should work. made few other esthetic tweaks. give try: rewritecond %{request_method} post rewritecond %{remote_addr} !^1.2.3.4 rewritecond %{remote_addr} !^4.3.2.1 rewritecond %{request_uri} !about-us/contact-us rewriterule ^ - [f]
Read more