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How do I run a Ruby file in a Rails environment?
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#!/usr/bin/env /Users/me/rails_project/script/rails runner
Product.all.each { |p| p.price *= 2 ; p.save! }
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How to declare a global variable in JavaScript?
...s available only in browsers. Could you edit you answer to make it work in all environments? See How to get the global object in JavaScript?
– Michał Perłakowski
Nov 30 '16 at 15:50
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How to test android referral tracking?
...ust run in a terminal:
adb shell
am broadcast -a com.android.vending.INSTALL_REFERRER -n <your.package>/.<path.up.until.your.BroadcastReceiver> --es "referrer" "utm_source=test_source\&utm_medium=test_medium\&utm_term=test_term\&utm_content=test_content\&utm_campaign=te...
Check whether an array is empty [duplicate]
...pty($errors)) {
}
array_filter() function's default behavior will remove all values from array which are equal to null, 0, '' or false.
Otherwise in your particular case empty() construct will always return true if there is at least one element even with "empty" value.
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Getting value of public static final field/property of a class in Java via reflection
...t(null);
Exception handling is left as an exercise for the reader.
Basically you get the field like any other via reflection, but when you call the get method you pass in a null since there is no instance to act on.
This works for all static fields, regardless of their being final. If the field ...
How to convert string to boolean php
...ted by @lauthiamkok in the comments. I'm posting it here as an answer to call more attention to it.
Depending on your needs, you should consider using filter_var() with the FILTER_VALIDATE_BOOLEAN flag.
filter_var( true, FILTER_VALIDATE_BOOLEAN); // true
filter_var( 'true', FILTER_VALIDATE_...
Anonymous recursive PHP functions
... pass it by reference. Be aware, that if you modify the $factorial before calling the function, the result will change as it's passed by reference.
– Marius Balčytis
Sep 13 '12 at 21:48
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Thread-safe List property
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ConcurrentBag doesn't implement IList and is not actually thread safe version of List
– Vasyl Zvarydchuk
Apr 3 '17 at 20:55
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How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
...on the same way with the LIKE statement. Simply do the following to return all upper case 'D's. "SELECT * FROM SomeTable WHERE ColumnName like '%D%' COLLATE SQL_Latin1_General_CP1_CS_AS"
– Radderz
Dec 12 '16 at 12:19
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How do you read a file into a list in Python? [duplicate]
...each line might have. When the with ends, the file will be closed automatically for you. This is true even if an exception is raised inside of it.
2. use of list comprehension
This could be considered inefficient as the file descriptor might not be closed immediately. Could be a potential issue wh...