coffeescript - Switch case statement in coffee script -


i have few different buttons calling same function , have them wrapped in switch statement instead of using bunch of else if conditions. great!!!

events: "click .red, .blue, #black, #yellow" : "openoverlay"  openoverlay: (e) ->   e.preventdefault()   e.stoppropagation()  target = $(e.currenttarget)  # view should opened view =    if target.hasclass 'red' new app.redview   else if target.hasclass 'blue' new app.blueview   else if target.is '#black' new app.blackview   else     null  # open view app.router.overlays.add view: view if view?

there 2 forms of switch in coffeescript:

switch expr     when expr1 ...     when expr2 ...     ...     else ...

and:

switch     when expr1 ...     when expr2 ...     ...     else ...

the second form might you:

view = switch   when target.hasclass 'red' new app.redview   when target.hasclass 'blue' new app.blueview   when target.is '#black' new app.blackview   else null

you leave out else null if undefined acceptable value view. wrap logic in (explicit) function:

viewfor = (target) ->     # there lots of ways this...     return new app.redview   if(target.hasclass 'red')     return new app.blueview  if(target.hasclass 'blue')     return new app.blackview if(target.is '#black')     null  view = viewfor target

giving logic name (i.e. wrapping in function) useful clarifying code.


Comments

Post a Comment

Popular posts from this blog

apache - Remove .php and add trailing slash in url using htaccess not loading css -

i have add following code htaccess file removing .php extension , add trailing slash urls. worked fine reduced page loading speed , css code not loading @ all. pages ugly. please help rewriteengine on rewritebase / ## hide .php extension snippet # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l] # add trailing slash rewritecond %{request_filename} !-f rewritecond %{request_uri} !/$ rewriterule . %{request_uri}/ [l,r=301] # internally forward /dir/foo /dir/foo.php rewritecond %{request_filename} !-d rewritecond %{request_filename}.php -f rewriterule ^(.*?)/?$ $1.php [l] we can rewrite urls using .htaccess files. before writing in .htaccess files need verify kind of server using. can check server adding a <?php phpinfo(); ?> in php page. ensure mod_rewrite module enabled in apache server. can identified checking phpinfo included page. common methods used url rewriting follows ...
Read more

javascript - jQuery show full size image on click -

pretty self explanatory not workking . i want display full image when user click on image... yes know there tons of plugins but i want keep simple. any idea ? css : .full { display: none; width: 500px; height: 500px; margin-left: 100px; margin-top: -300px; position: fixed; background-color: #f00; z-index: 6; } .thumbnail { width: 50px; height: 50px; } html: <img class="thumbnail" src="http://4.bp.blogspot.com/-uhbdp2esxng/txneptvi92i/aaaaaaaaaky/upfqis7zto0/s1600/rihanna-wallpaper.jpg"> jquery: $(document).ready(function() { $('.thumbnail').on('click', function() { var img = $('<img />',{src:this.src,'class':'full'}); $('.full').html(img).show(); console.log('done!'); }); }); try looking how jquery works. $(document).ready(function() { $('.thumbnail').on('click', function(...
Read more