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How to apply shell command to each line of a command output?
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It's probably easiest to use xargs. In your case:
ls -1 | xargs -L1 echo
The -L flag ensures the input is read properly. From the man page of xargs:
-L number
Call utility for every number non-empty lines read.
A...
How do I read from parameters.yml in a controller in symfony2?
...tainer->getParameter('api_user');
This documentation chapter explains it.
While $this->get() method in a controller will load a service (doc)
In Symfony 2.7 and newer versions, to get a parameter in a controller you can use the following:
$this->getParameter('api_user');
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How does the Amazon Recommendation feature work?
...mendation is currently the best in the market, but how do they provide us with such relevant recommendations?
8 Answers
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Create PostgreSQL ROLE (user) if it doesn't exist
How do I write an SQL script to create a ROLE in PostgreSQL 9.1, but without raising an error if it already exists?
10 Answ...
Removing multiple keys from a dictionary safely
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edited Jan 16 '18 at 8:22
answered Jan 24 '12 at 23:20
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Regex (grep) for multi-line search needed [duplicate]
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Without the need to install the grep variant pcregrep, you can do multiline search with grep.
$ grep -Pzo "(?s)^(\s*)\N*main.*?{.*?^\1}" *.c
Explanation:
-P activate perl-regexp for grep (a powerful extension of regular ex...
How to change the background color of a UIButton while it's highlighted?
...dSet {
backgroundColor = isHighlighted ? UIColor.black : UIColor.white
}
}
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Amazon products API - Looking for basic overview and information
After using the ebay API recently, I was expecting it to be as simple to request info from Amazon, but it seems not...
6 An...
How to implement WiX installer upgrade?
...f using your own.
For example, we use this code to do automatic upgrades. It prevents downgrades, giving a localised error message, and also prevents upgrading an already existing identical version (i.e. only lower versions are upgraded):
<MajorUpgrade
AllowDowngrades="no" DowngradeErrorMes...
Rails 2.3-style plugins and deprecation warnings running task in Heroku
...tly as 2013-08, heroku always injected plugins in rails 3 apps, even apps with the recommended gems. This was an issue with the ruby buildpack, and was fixed by PR 11, merged on 2013-08-06.
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