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How to remove a field from params[:something]
My registration form, which is a form for the Users model, takes a string value for company. However, I have just made a change such that users belongs_to companies. Therefore, I need to pass an object of Company to the Users model.
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How do different retention policies affect my annotations?
...ionPolicy.RUNTIME)
@interface RetentionRuntime {}
public static void main(String[] args) {
@RetentionSource
class B {}
assert B.class.getAnnotations().length == 0;
@RetentionClass
class C {}
assert C.class.getAnnotations().length == 0;
@RetentionRuntime
class D {}
...
How to properly check if std::function is empty in C++11?
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Your result strings are swapped.
– Sophit
Nov 21 '19 at 21:19
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What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...code :
class Setting
include MongoMapper::Document
key :news_search, String, :required => true
key :is_availaible_for_iphone, :required => true, :default => false
belongs_to :movie
end
Adding a key is just adding a line of code !
There are also other advantages that will appea...
How do I get an apk file from an Android device?
...On more recent versions of Android (Oreo and Pie), an unpredictable random string is appended. The following sequence of commands is what worked for me on a non-rooted device:
1) Determine the package name of the app, e.g. "com.example.someapp". Skip this step if
you already know the package name.
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Difference between passing array and array pointer into function in C
...is the operand of the sizeof operator or the unary & operator, or is a
string literal used to initialize an array, an expression that has type ‘‘array of type’’ is
converted to an expression with type ‘‘pointer to type’’ that points to the initial element of
the array object and ...
python: How do I know what type of exception occurred?
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If you want to store the traceback as a string, you can use traceback.format_exc() as well
– Stevoisiak
Jun 1 '18 at 15:18
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How can I select every other line with multiple cursors in Sublime Text?
... moment to comment on the answer above.
You can use the following search string with the regex turned on, and then press alt+enter. Followed by a left arrow. This would put a cursor each on alternate lines (same steps as explained by Joe Daley)
^.*\n.*$
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Why does += behave unexpectedly on lists?
...ts += changes the object's value, whereas for immutable types like tuples, strings and integers a new object is returned instead (a += b becomes equivalent to a = a + b).
For types that support both __iadd__ and __add__ you therefore have to be careful which one you use. a += b will call __iadd__ a...
How do I migrate an SVN repository with history to a new Git repository?
...sitory, something like http://svn.mycompany.com/myrepo/repository. The URL string must not include /trunk, /tag or /branches.
Note that after executing this command it very often looks like the operation is "hanging/freezed", and it's quite normal that it can be stuck for a long time after initiali...