javascript - Return statement not working, with document.write -



javascript - Return statement not working, with document.write -

why doesn't document.write(added); work?

function first(){ var = new date(); var first=math.round(now.getmilliseconds()/20); var second=math.round(now.getmilliseconds()/30); var added=first+second; homecoming added; } first(); document.write(added);

javascript has function scoping, means variables declared in function can't accessed outside of function. return added returns value of added, not variable added itself. if want utilize value, need set in variable declared outside function:

function first(){ var = new date(); var first=math.round(now.getmilliseconds()/20); var second=math.round(now.getmilliseconds()/30); var added=first+second; homecoming added; } var firstresult = first(); document.write(firstresult);

more advanced, related: types of javascript variable scope

javascript return

Comments

Post a Comment

Popular posts from this blog

ruby on rails - Devise Logout Error in RoR -

ruby on rails - Devise Logout Error in RoR - while using devise in ror, encountering unusual error when trying log out url different root url. displays me : actioncontroller::invalidauthenticitytoken in devise::sessionscontroller#destroy" for illustration if rooting path after log in '/structure', , seek log out '/general' error, while logging out '/structure' fine. any help highly appreciated. ruby-on-rails ruby devise
Read more

model view controller - MVC Rails Planning -

model view controller - MVC Rails Planning - i'm starting rails , i'm building app stores films info, user can watch film , give grade on web application. i have coded cinema model, controller , views. now, have 2 questions: should need create model , controller grading? in case, should create or should wait , create first users model , controller? yes, on model , controller grades. that'd feasible way maintain track of who's graded what. it's create first, i'd start users, since grades depend on both films , users. ruby-on-rails model-view-controller
Read more

php - Working with pretty urls on apache and fastcgi after hhvm installation -

php - Working with pretty urls on apache and fastcgi after hhvm installation - i needed slim php work pretty urls using .htaccess , no problem. rewriteengine on rewritecond %{request_filename} !-f rewriterule ^ index.php [qsa,l] now ran using hhvm, fastcgi using virtual host config. <virtualhost *:80> servername project.dev serveralias www.project.dev documentroot /var/www/project proxypassmatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:9000/var/www/project/$1 <directory "/var/www/project"> allowoverride order allow,deny allow </directory> </virtualhost> of course, won't read .htaccess file, thought of adding .htaccess config in virtual host config, no, won't work. like so: <virtualhost *:80> servername project.dev serveralias www.project.dev documentroot /var/www/project proxypassmatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:9000/var/www/project/$1 <directory "/var/www/project"...
Read more