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Node.js: printing to console without a trailing newline?
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@Chev: Most people will dissuade you from playing with hardcoded escape sequences due to their own FUD, but almost everyone uses VT100 now, so compatibility is not really an issue any more. The functionality you are referring to is "alternate screen" behavior. A...
How to update a value, given a key in a hashmap?
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From Javadoc: "If the value for the specified key is present and non-null, attempts to compute a new mapping". You can use compute() instead, it will handle null values as well.
– Konstantin Milyutin
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Socket File “/var/pgsql_socket/.s.PGSQL.5432” Missing In Mountain Lion (OS X Server)
I just upgraded my MacMini Server from Lion Server to Mountain Lion using OS X Server. I am having the same problem with PostgreSQL that I did last year when I first installed Lion Server.
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How to check if one of the following items is in a list?
...hus any can return early, whereas your version has to build the whole list from comprehension before any can use it. @user89788's answer is slightly better because the double parentheses are unnecessary
– Anentropic
Jan 29 '14 at 12:26
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Remove carriage return in Unix
What is the simplest way to remove all the carriage returns \r from a file in Unix?
20 Answers
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How to do if-else in Thymeleaf?
...plate code.
The 'authentication' and 'authorization' utility objects came from thymeleaf extras springsecurity3 library.
When 'authentication' object is not available OR authorization.expression('isAuthenticated()') evaluates to 'false', expression returns ${false}, otherwise ${true}.
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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 ...
How to write a bash script that takes optional input arguments?
...s an empty string), use this syntax instead:
somecommand ${1-foo}
Again from Bash Reference Manual - 3.5.3 Shell Parameter Expansion:
Omitting the colon results in a test only for a parameter that is unset. Put another way, if the colon is included, the operator tests for both parameter’s e...
bundler vs RVM vs gems vs RubyGems vs gemsets vs system ruby [closed]
...to the versions the distro maintainers have packaged, so I usually install from source. But, that's a pain when managing several versions of Ruby for development, test and production systems, which is why rbenv and RVM were invented -- they handle the dirty detail allowing us to concentrate on progr...