regex - String.prototype.match differences between Chrome/Safari & FireFox -


i have pretty simple regex expression, 

"lang-bash".match("lang-([a-z]+)", "gi")

and on latest chrome (43-ish) expected behaviour of ["lang-bash", "bash"]. when try same on latest firefox (39 or 41a) ["lang-bash"]. tried in safari (8.0.7) , has expected result of ["lang-bash", "bash"].

so might bug in firefox, can submit for, i'm expecting it's don't understand. thanks!

edit: alright... more testing.

firefox 

"lang-bash lang-dash".match(/lang-([a-z]+)/i) array [ "lang-bash", "bash" ] "lang-bash lang-dash".match(/lang-([a-z]+)/ig) array [ "lang-bash", "lang-dash" ] "lang-bash lang-dash".match("lang-([a-z]+)", "gi") array [ "lang-bash", "lang-dash" ]

safari 

"lang-bash lang-dash".match(/lang-([a-z]+)/i) [ "lang-bash", "bash" ] "lang-bash lang-dash".match(/lang-([a-z]+)/ig) [ "lang-bash", "lang-dash" ] "lang-bash lang-dash".match("lang-([a-z]+)", "gi") ["lang-bash", "bash"]

chrome

"lang-bash".match(/lang\-([a-z]+)/i) ["lang-bash", "bash"] "lang-bash".match(/lang\-([a-z]+)/gi) ["lang-bash"] "lang-bash lang-dash".match("lang-([a-z]+)", "gi") ["lang-bash", "bash"]

since there's capture, i'd expect result of flags ig [ "lang-bash", "lang-dash", "bash", "dash" ] guess that's not correct @ all. seems browsers act differently here. have idea what's going on?

originally, firefox implements non-standard flags argument in string.prototype.{search, match, replace}. argument deprecated in firefox 39 , removed in future version. see more in bug report issue.

what see in firefox due effect of flags argument.

when match used global g pattern, main matches included. without global flag, match returns first match in index 0 , captured text in indices 1.

since firefox aware of flags argument, returns main matches without capturing groups, seen in:

"lang-bash lang-dash".match("lang-([a-z]+)", "gi") "lang-bash".match("lang-([a-z]+)", "gi")

other browsers ignore flags argument, result shows first match , capturing groups.

if need flags, specify in regexp literal (if pattern fixed) or regexp constructor (if pattern dynamic).


Comments

Post a Comment

Popular posts from this blog

Rendering JButton to get the JCheckBox behavior in a JTable by using images does not update my table -

i rendering jbutton image on simulate jcheckbox behavior. why don't let jtable render jcheckbox? because need bigger checkboxes , there's no way can resize them (as far know). so, have own table cell renderer , editor. both renders jbutton , checkbox images on them. trying change image checked image unchecked image (or vice versa) , update cell value (boolean true or false). however, reason, getcelleditorvalue() not update table. so, release mouse, value goes original one. any appreciated! lot! public class tableexample extends jframe { jscrollpane pane; jpanel panel; jtable table; object[][] data; mytablemodel tm; renderer buttoncolumn; public tableexample(object[][] data) throws ioexception { string[] columns = {"column#1", "column#2", "column#3", "column#4", "column#5", "column#6"}; this.data = data; this.setpreferredsize(new dimension(700, 500)); ...
Read more

javascript - Using jquery append to add option values into a select element not working -

i'm looking dynamically populate select element names of items stored array. for reason it's not working , i'm not sure why. html: <div class="col-md-4 col-md-offset-4"> <select class="select1"> </select> , <select class="select2"> </select> </div> note i'm using bootstrap layout. here's jquery i'm using try , populate ".select1" jquery: select: function() { $.each(state.greens, function(index, value) { $(".select1").append("<option value =' " + index + " '>" + state.greens[index].name + "</option>"); }); } note function 'select' stored within object called 'display'. state.greens name of array i'm trying access. so @ end of html page call display.select(); call function. no error messages showing in console. also, saw question: appending ...
Read more

Android soft keyboard reverts to default keyboard on orientation change -

i'm building android soft keyboard , can't seem fix bug - have arabic , qwerty keyboard , when rotate device on qwerty keyboard (or arabic shift), it's if program has "restarted" , becomes arabic keyboard without shift. the onsaveinstancestate(bundle savedinstancestate) not work because application not extend activity inputmethodservice . i put following in android manifest android:configchanges="keyboard|keyboardhidden|orientation" android:windowsoftinputmode="stateunchanged|adjustresize"> i tried using @override public void onconfigurationchanged(configuration newconfig) { super.onconfigurationchanged(newconfig); log.i(mydebug, "config changed " + currentkeyboard.equals(qwerty)); } however, currentkeyboard.equals(qwerty)) results false , made sure true before orientation change. any appreciated. i think applications fault. if application restarting on orientation change...
Read more