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How many characters can a Java String have?
I'm trying The Next Palindrome problem from Sphere Online Judge (SPOJ) where I need to find a palindrome for a integer of up to a million digits. I thought about using Java's functions for reversing Strings, but would they allow for a String to be this long?
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Can I get the name of the current controller in the view?
Is there a way to figure out what the current controller is from within the view?
5 Answers
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How to find where a method is defined at runtime?
...dities in Rails' library loading, it only occurred when we ran it directly from Mongrel in production mode.
10 Answers
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Difference between `npm start` & `node app.js`, when starting app?
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From the man page, npm start:
runs a package's "start" script, if one was provided.
If no version is specified, then it starts the "active" version.
Admittedly, that description is completely unhelpful, and that's all...
How to get nice formatting in the Rails console
...e before you can get the y method to work:
YAML::ENGINE.yamler = 'syck'
From ruby-docs
In older Ruby versions, ie. <= 1.9, Syck is still provided, however it
was completely removed with the release of Ruby 2.0.0.
For rails 4/ruby 2 you could use just
puts object.to_yaml
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Get Android API level of phone currently running my application [duplicate]
... is an integer.
In either case, the integer you get maps to an enum value from all those defined in android.os.Build.VERSION_CODES:
SDK_INT value Build.VERSION_CODES Human Version Name
1 BASE Android 1.0 (no codename)
2 ...
Find out which remote branch a local branch is tracking
... which branches are tracking which remote branches. Here's example output from a repository with a single commit and a remote branch called abranch:
$ git branch -av
* abranch d875bf4 initial commit
master d875bf4 initial commit
remotes/origin/HEAD -> origi...
Network usage top/htop on Linux
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Not to detract from Oli's contribution - ntop has multiple dependencies (gdbm, rrdtool, everything rrdtool requires), and while it's a useful tool if you have a long-term need to store and query. If you literally just want 'top, but for net...
NerdTree - Reveal file in tree
... change buffer, the nerdtree will automatically refreshed itself (I copied from here with tiny modifications)
" Check if NERDTree is open or active
function! IsNERDTreeOpen()
return exists("t:NERDTreeBufName") && (bufwinnr(t:NERDTreeBufName) != -1)
endfunction
" Call NERDTreeFind...
How to append one file to another in Linux from the shell?
...d just within a few seconds, 50 million lines have been put in to the file from just previously a few dozen lines.
– Hendra Uzia
Mar 20 '17 at 6:56
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