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How do I make a list of data frames?
...f data frames here are three good choices:
# base option - slower but not extra dependencies
big_data = do.call(what = rbind, args = df_list)
# data table and dplyr have nice functions for this that
# - are much faster
# - add id columns to identify the source
# - fill in missing values if some...
How do you copy the contents of an array to a std::vector in C++ without looping?
...ven when a function expects c-style arrays you can use vectors:
vector<char> v(50); // Ensure there's enough space
strcpy(&v[0], "prefer vectors to c arrays");
Hope that helps someone out there!
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What is a regular expression which will match a valid domain name without a subdomain?
...specs, your specs are wrong. g.co is a valid domain name but g is only one character.
– sch
Apr 24 '12 at 22:23
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Is it safe to use Project Lombok? [closed]
...le range for a numeric value? Or the permissible length and/or format of a String value? Or whether a String value is suitable for presenting to an end user? Or documenting what the property actually means, when its name can't possibly explain it in full? (JList.getLayoutOrientation and JList.setLay...
Should I hash the password before sending it to the server side?
...ng is that on connection to the client the server generates a salt (random string to be added before hashing) and stores it on the sockets variable, then it transmits this hash to the client. The client takes the users password, hashes it, adds the salt from the server and hashes the whole thing, be...
Apache and Node.js on the Same Server
...writeCond %{REQUEST_URI} ^socket.io [NC]
RewriteCond %{QUERY_STRING} transport=websocket [NC]
RewriteRule /{.*} ws://localhost:3000/$1 [P,L]
RewriteCond %{HTTP:Connection} Upgrade [NC]
RewriteRule /(.*) ws://localhost:3000/$1 [P,L]
ProxyPass /nodejs http://loca...
Vim: Creating parent directories on save
...feedback. I don't want to solve problems I don't have. I never use special chars (i.e. spaces) on my folders, so %:p:h does just fine for me. I never source vimrc (I kill and reopen vim instead) and I don't even know what pseudofiles are. redraw! doesn't seem to do anything at all to me. But I like ...
Pointers in Python?
... to a function, and I can't pass a variable by reference using an int or a string?
– Sam
Mar 21 at 15:42
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Architecture for merging multiple user accounts together
...ision)! I am wondering if you found a way to auto-login the user into the "extra" accounts that are linked after the first login into the application. Would the user have to login separately into each account every time they visit (if there isn't an active session with this providers already)?
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How to find the size of localStorage
...s the length of the key itself.
Each length is multiplied by 2 because the char in javascript stores as UTF-16 (occupies 2 bytes)
P.P.S. Should work both in Chrome and Firefox.
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