| Server IP : 185.86.78.101 / Your IP : 216.73.216.124 Web Server : Apache System : Linux 675867-vds-valikoshka1996.gmhost.pp.ua 5.4.0-150-generic #167-Ubuntu SMP Mon May 15 17:35:05 UTC 2023 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /www/wwwroot/mifepriston.org/node_modules/math-expression-evaluator/src/ |
Upload File : |
var Mexp=require('./lexer.js');
Mexp.prototype.toPostfix = function () {
'use strict';
var post=[],elem,popped,prep,pre,ele;
var stack=[{value:"(",type:4,pre:0}];
var arr=this.value;
for (var i=1; i < arr.length; i++) {
if(arr[i].type===1||arr[i].type===3||arr[i].type===13){ //if token is number,constant,or n(which is also a special constant in our case)
if(arr[i].type===1)
arr[i].value=Number(arr[i].value);
post.push(arr[i]);
}
else if(arr[i].type===4){
stack.push(arr[i]);
}
else if(arr[i].type===5){
while((popped=stack.pop()).type!==4){
post.push(popped);
}
}
else if(arr[i].type===11){
while((popped=stack.pop()).type!==4){
post.push(popped);
}
stack.push(popped);
}
else {
elem=arr[i];
pre=elem.pre;
ele=stack[stack.length-1];
prep=ele.pre;
var flag=ele.value=='Math.pow'&&elem.value=='Math.pow';
if(pre>prep)stack.push(elem);
else {
while(prep>=pre&&!flag||flag&&pre<prep){
popped=stack.pop();
ele=stack[stack.length-1];
post.push(popped);
prep=ele.pre;
flag=elem.value=='Math.pow'&&ele.value=='Math.pow';
}
stack.push(elem);
}
}
}
return new Mexp(post);
};
module.exports=Mexp;