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Undo scaffolding in Rails
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First, if you have already run the migrations generated by the scaffold command, you have to perform a rollback first.
rake db:rollback
You can create scaffolding using:
rails generate scaffold MyFoo
(or similar), and you can destroy/undo it using
rails destroy scaffold M...
Failed binder transaction when putting an bitmap dynamically in a widget
.... Unfortunately this bundle has a very small size limit.
You can solve it by scaling down the image size this way:
public static Bitmap scaleDownBitmap(Bitmap photo, int newHeight, Context context) {
final float densityMultiplier = context.getResources().getDisplayMetrics().density;
i...
How to urlencode data for curl command?
... be CGI-compliant, the <data> part should begin with a name followed by a separator and a content specification.
Example usage:
curl \
--data-urlencode "paramName=value" \
--data-urlencode "secondParam=value" \
http://example.com
See the man page for more info.
This requires ...
Git: How to return from 'detached HEAD' state
... discard any commits you make in this
state without impacting any branches by performing another checkout.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again.
Example:
git checkout -b <new-branch-name>
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std::vector versus std::array in C++
...f fulfilling such requirements other than using a dynamic array. As stated by @Lucretiel, the standard actually requires that the elements are stored contiguously, so it is a dynamic array, stored where the associated allocator puts it.
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SQLite error 'attempt to write a readonly database' during insert?
... Also the db file and the directory it resides in must be owned by 'www-data' on linux boxes.
– anisbet
Jan 8 '15 at 21:28
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Get timezone from DateTime
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This project is no longer maintained by the author; publicdomain.codeplex.com It seems like maybe this one might help, depending on the usage, one has to set it before using it; timezone.codeplex.com
– AnneTheAgile
Jan 9 ...
MIT vs GPL license [closed]
...d can lead to software privatization (=restriction and loss of its control by the user). Thanks again
– Jorge Orpinel
Mar 17 '14 at 21:17
3
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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
...ar interval and check all of the values in the data structure recursively. By comparison, setting a value on the state will signal to a listener that some state has changed, so React can simply listen for change events on the state and queue up re-rendering.
The virtual DOM is used for efficient re...
Best way to specify whitespace in a String.Split operation
...cters are assumed to be the delimiters. White-space characters are defined by the Unicode standard and return true if they are passed to the Char.IsWhiteSpace method.
Always, always, always read the documentation!
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