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Laravel Schema onDelete set null
...re you set the foreign key field as nullable:
$table->integer('foreign_id')->unsigned()->nullable();
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Pure virtual destructor in C++
... Um, yes it is. Pure only means a derived class also needs to provide an implementation.
– MSN
Mar 10 '09 at 16:24
73
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Remove all classes that begin with a certain string
I have a div with id="a" that may have any number of classes attached to it, from several groups. Each group has a specific prefix. In the javascript, I don't know which class from the group is on the div. I want to be able to clear all classes with a given prefix and then add a new one. If I want...
What does in XML mean?
...ou cannot include the string ]]> (CDEnd), while in a comment -- is invalid.
Parameter Entity references are not recognized inside of comments.
This means given these four snippets of XML from one well-formed document:
<!ENTITY MyParamEntity "Has been expanded">
<!--
Within this co...
How to use the 'main' parameter in package.json?
...
From the npm documentation:
The main field is a module ID that is the primary entry point to your
program. That is, if your package is named foo, and a user installs
it, and then does require("foo"), then your main module's exports
object will be returned.
This should ...
How do I make the scrollbar on a div only visible when necessary?
...
Use overflow: auto. Scrollbars will only appear when needed.
(Sidenote, you can also specify for only the x, or y scrollbar: overflow-x: auto and overflow-y: auto).
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Call an activity method from a fragment
...ayout xml
YourFragmentClass fragment = (YourFragmentClass)fm.findFragmentById(R.id.your_fragment_id);
fragment.yourPublicMethod();
If you added fragment via code and used a tag string when you added your fragment, use findFragmentByTag instead:
YourFragmentClass fragment = (YourFragmentClass)fm.f...
Mocking a class: Mock() or patch()?
...ect):
... def __init__(self):
... print 'Created MyClass@{0}'.format(id(self))
...
>>> def create_instance():
... return MyClass()
...
>>> x = create_instance()
Created MyClass@4299548304
>>>
>>> @mock.patch('__main__.MyClass')
... def create_instance2(...
Why JSF calls getters multiple times
...n {
private SomeObject someProperty;
@PostConstruct
public void init() {
// In @PostConstruct (will be invoked immediately after construction and dependency/property injection).
someProperty = loadSomeProperty();
}
public void onload() {
// Or in GET ac...
Find objects between two dates MongoDB
I've been playing around storing tweets inside mongodb, each object looks like this:
14 Answers
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