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How do I search within an array of hashes by hash values in ruby?
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You're looking for Enumerable#select (also called find_all):
@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the documentation, it "returns a...
How can I suppress all output from a command using Bash?
...tions is to assign the result of a command to a variable:
$ DUMMY=$( grep root /etc/passwd 2>&1 )
$ echo $?
0
$ DUMMY=$( grep r00t /etc/passwd 2>&1 )
$ echo $?
1
Since Bash and other POSIX commandline interpreters does not consider variable assignments as a command, the present comm...
Xcode source automatic formatting
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this shouldn't be selected as the answer. the answer below from @ken is correct
– Ryan Angilly
Feb 8 '13 at 16:44
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How to replace DOM element in place using Javascript?
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what if it is root html element
– lisak
Jun 5 '11 at 18:01
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I forgot the password I entered during postgres installation
...a TCP connection.
# sudo -u postgres psql
could not change directory to "/root"
psql (9.1.11)
Type "help" for help.
postgres=# \password
Enter new password:
Enter it again:
postgres=# \q
Failing:
# psql -U postgres -W
Password for user postgres:
psql: FATAL: Peer authentication failed for user...
import .css file into .less file
...ompiled stylesheet, which is what you want if that file is out of your web root for example. Note that the default behaviour when @importing a .css file is the same as with the (css) flag - read the docs for more info :)
– neemzy
Dec 26 '14 at 8:37
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How to prompt for user input and read command-line arguments [closed]
...v[1]
except:
e = sys.exc_info()[0]
print e
1) To find the square root of 5
C:\Users\Desktop>python -i emp.py 5
25
['emp.py', '5']
5
2) Passing invalid argument other than number
C:\Users\bgh37516\Desktop>python -i emp.py five
usage: emp.py [-h] square
emp.py: error: argument squa...
Visual Studio: How to break on handled exceptions?
...the VS2010 environement, by going to "Tools", "Import Export Settings" and select a reset to the C# environment... it contains the Exceptions Submenu item
– BeardinaSuit
Feb 14 '12 at 16:28
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Get list of databases from SQL Server
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Execute:
SELECT name FROM master.sys.databases
This the preferred approach now, rather than dbo.sysdatabases, which has been deprecated for some time.
Execute this query:
SELECT name FROM master.dbo.sysdatabases
or if you pref...
Eclipse fonts and background color
...→ General → Editors → Text Editors
Browse Appearance color options
Select background color options, uncheck default, change to black
Select background color options, uncheck default, change to colour of choice
To change text colours
Open Java → Editor → Syntax Colouring
Select ele...