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Finding # occurrences of a character in a string in Ruby
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If you just want the number of a's:
puts "Melanie is a noob".count('a') #=> 2
Docs for more details.
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improv...
How to verify a user's password in Devise
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Use Devise Methods
Devise provides you with built-in methods to verify a user's password:
user = User.find_for_authentication(email: params[:user][:email])
user.valid_password?(params[:user][:password])
For Rails 4+ with Strong Params, you can do something like this:
def login
user ...
os.path.dirname(__file__) returns empty
...lename into components without taking into account the current directory. If you want to also consider the current directory, you have to do so explicitly.
To get the dirname of the absolute path, use
os.path.dirname(os.path.abspath(__file__))
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What is the difference between README and README.md in GitHub projects?
... projects. Github has their own flavor of Markdown.
Order of Preference: If you have two files named README and README.md, the file named README.md is preferred, and it will be used to generate github's html summary.
FWIW, Stack Overflow uses local Markdown modifications as well (also see Stack...
How do you tell Resharper that a method parameter is a string containing a CSS class?
...a parameter that is expected to be one of the limited set of
values. Specify fields of which type should be used as values for this
parameter.
Unfortunately, I've not figured out how it works. Maybe it's buggy in my Resharper version 9.2.
What I've tried so far:
namespace ValueProviderSample...
PostgreSQL delete with inner join
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If you have more than one join you could use comma separated USING statements:
DELETE
FROM
AAA AS a
USING
BBB AS b,
CCC AS c
WHERE
a.id = b.id
AND a.id = c.id
AND a.uid = 12345
AND c.gid ...
What is the use of the pipe symbol in YAML?
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The pipe symbol at the end of a line in YAML signifies that any indented text that follows should be interpreted as a multi-line scalar value. See the YAML spec.
Specifically, the pipe indicates that (except for the indentation) the scalar value should be interpreted lite...
Printing newlines with print() in R
..../program F=filename",[additional text for third line]))
This is helpful if you plan on writing a multiline message with combined fixed and variable input, such as the [additional text for third line] above.
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Scatterplot with marginal histograms in ggplot2
...strating the placement, but you should not be re-doing the random sampling if you want the interior scatter to "line up" with the marginal histograms.
– IRTFM
Dec 17 '11 at 16:35
1...
MySQL remove all whitespaces from the entire column
Is there a way to remove all whitespaces from a specific column for all values?
5 Answers
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