How do I use the number range in regex matched groups in a loop in javascript? -


i'm looking use numbers in regex find , run loop using first number starting point , last number ending point , write text using javascript core objects, methods or functions. have array of strings in form '<disp-formula id="deqn4-9">', '<disp-formula id="deqn15-17">' , on.. , using array want write below: expected output:

rid"4"/<disp-formula id="deqn4-9"> rid"5"/<disp-formula id="deqn4-9"> rid"6"/<disp-formula id="deqn4-9"> rid"7"/<disp-formula id="deqn4-9"> rid"8"/<disp-formula id="deqn4-9"> rid"9"/<disp-formula id="deqn4-9"> rid"15"/<disp-formula id="deqn15-17"> rid"16"/<disp-formula id="deqn15-17"> rid"17"/<disp-formula id="deqn15-17">

basically, takes number range array , uses every single number fall in range , write in above mentioned fashion. i've tried below code:

var mystring = ['<disp-formula id="deqn4-9">', '<disp-formula id="deqn15-17">'];             var myregexp = /(\d+)-(\d+)/g;             my_arr = myregexp.exec(mystring);             while (my_arr != null) {                 var a1 = my_arr[0];                 var xs = a1.split("-");                 var new1=xs[0];                 var new2=xs[1];                 (var i=new1; i<=new2; i++){                     console.log('rid"'+i+'"/'+mystring[0]);                 }                 var a2 = my_arr[1];                 var ys = a2.split("-");                 var _new1=xs[0];                 var _new2=xs[1];                 (var j=_new1; j<=_new2; j++){                     console.log('rid"'+j+'"/'+mystring[1]);                 }                 my_arr = myregexp.exec(mystring);             }

but returns

rid"4"/<disp-formula id="deqn4-9"> rid"5"/<disp-formula id="deqn4-9"> rid"6"/<disp-formula id="deqn4-9"> rid"7"/<disp-formula id="deqn4-9"> rid"8"/<disp-formula id="deqn4-9"> rid"9"/<disp-formula id="deqn4-9"> rid"4"/<disp-formula id="deqn15-17"> rid"5"/<disp-formula id="deqn15-17"> rid"6"/<disp-formula id="deqn15-17"> rid"7"/<disp-formula id="deqn15-17"> rid"8"/<disp-formula id="deqn15-17"> rid"9"/<disp-formula id="deqn15-17"> rid"15"/<disp-formula id="deqn4-9"> rid"16"/<disp-formula id="deqn4-9"> rid"17"/<disp-formula id="deqn4-9"> rid"15"/<disp-formula id="deqn15-17"> rid"16"/<disp-formula id="deqn15-17"> rid"17"/<disp-formula id="deqn15-17">

what doing wrong here?

i modified code work 

var mystring = ['<disp-formula id="deqn4-9">', '<disp-formula id="deqn15-17">', '<disp-formula id="deqn99-100">', '<disp-formula id="deqn999-1001">'];  var myregexp = /(\d+)-(\d+)/g;  my_arr = myregexp.exec(mystring);  var idx = 0;  while (my_arr != null) {      var a1 = my_arr[0];      var xs = a1.split("-");      var new1=parseint(xs[0]);      var new2=parseint(xs[1]);      (var i=new1; i<=new2; i++){          console.log('rid"'+i+'"/'+mystring[idx]);      }      idx++;      my_arr = myregexp.exec(mystring);  }

the mistakes were

var a2 = my_arr[1];

this matched 1st capturing group(i.e 4) , not 2nd match 

my_arr = myregexp.exec(mystring);

this move on next match , print mystring[idx] on

now did change make work, if refer this mdn blog see part 

var a2 = my_arr[1]; var ys = a2.split("-"); var _new1=xs[0]; var _new2=xs[1]; (var j=_new1; j<=_new2; j++){     console.log('rid"'+j+'"/'+mystring[1]); }

is of no use removed it. move on next idx did 

idx++ my_arr = myregexp.exec(mystring);

now my_arr move on next match


Comments

Post a Comment

Popular posts from this blog

ubuntu - PHP script to find files of certain extensions in a directory, returns populated array when run in browser, but empty array when run from terminal -

i running os ububtu 16.04. ultimate goal able run php script cron job every minute. here php script located @ /var/www/html/tests/test/index.php : <?php $directorypath = $_server['document_root']."/tests/test/data/"; echo "directorypath: $directorypath<br><br>";//check $imagefilepathsarray = glob($directorypath . "*.{png,gif}", glob_brace); echo "<br><br>imagefilepathsarray: "; print_r($imagefilepathsarray);//check ?> when open php script in browser visiting url my-ip-address/tests/test/index.php , get: directorypath: /var/www/html/tests/test/data/ imagefilepathsarray:array( [0] => /var/www/html/tests/test/data/pic.png [1] => /var/www/html/tests/test/data/pic.gif ) before writing cron job in crontab file, need check if can run anywhere using terminal . opened ubuntu terminal @ /home/ location, , executed in terminal: sudo php /var/www/html/tests/test/index.php i got following out...
Read more

php - How can i create a user dashboard -

today have questions you, want create user dashboard site, include (obviously), users data, example -email -username -and others stuff how can information, , print them in html page? if can, how can these information via php sessions? shuld use session? example, if user login, , start new session ( session_start() ), how can data print in dashboard? should use php "project"? in advice, have day , thank time!
Read more

javascript - How to detect toggling of the fullscreen-toolbar in jQuery Mobile? -

i have jquery mobile page fixed full-screen toolbar, data-tap-toggle enabled. straight under toolbar have positioned banner should slide upwards when toolbar hiding , slide downward when toolbar showing. jquery mobile toggles toolbar applying , removing ui-fixed-hidden class - sadly, can't find in documentation of toolbar widget toggle , hide or show event that. how can detect when toolbar toggled, reposition banner? .banner { position: fixed; background-color: darkseagreen; top: 46px; min-height: 48px; width: 100%; text-align: center; line-height: 48px; } <!doctype html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"> <script src="https://code.jquery.com/jquery-1....
Read more