大约有 10,700 项符合查询结果（耗时：0.0384秒） [XML]
django: BooleanField, how to set the default value to true?
...
If you're just using a vanilla form (not a ModelForm), you can set a Field initial value ( https://docs.djangoproject.com/en/2.2/ref/forms/fields/#django.forms.Field.initial ) like
class MyForm(forms.Form):
my_field = forms.BooleanField(initial=True)
If you're using a ModelFor...
Switch case with fallthrough?
...am looking for the correct syntax of the switch statement with fallthrough cases in Bash (ideally case-insensitive).
In PHP I would program it like:
...
Recommended way to stop a Gradle build
How can I stop a Gradle build after detecting a problem? I can use an assert, throw an exception, do a System.exit (bad idea), or use a dedicated function in Gradle (but I could not find one). What is the best way for Gradle (and why?).
...
Android Studio/Intellij Idea: “Table of Contents” for a class
...able of Contents" for a class. I apologize for not knowing exactly what to call it. But what I am referring to is the dropdown menu in eclipse that lists all the methods, interfaces, classes and so on that are in that class file. This then allows you to jump to that position. This view is when you a...
Re-entrant locks in C#
...e same object. The recursive code effectively already has the lock and so can continue unhindered.
lock(object) {...} is shorthand for using the Monitor class. As Marc points out, Monitor allows re-entrancy, so repeated attempts to lock on an object on which the current thread already has a lock ...
How to set the maximum memory usage for JVM?
...Xms<memory> -Xmx<memory>. Use M or G after the numbers for indicating Megs and Gigs of bytes respectively. -Xms indicates the minimum and -Xmx the maximum.
share
|
improve this answer
...
How default .equals and .hashCode will work for my classes?
...(x == y has the value true).
hashCode
As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation tec...
Hide all warnings in ipython
I need to produce a screencast of an ipython session, and to avoid confusing viewers, I want to disable all warnings emitted by warnings.warn calls from different packages. Is there a way to configure the ipythonrc file to automatically disable all such warnings?
...
Link latest file on Bitbucket Git repository
...ivate repo, it redirects to bytebucket.org & append a token so that it can be viewed publicly...like https://bytebucket.org/$username/$repo/raw/$sha/$filename.jpg?token=$sometoken. But the token is different for each file. Is there any way I can get/generate this type of token through bitbucket ...
Preview layout with merge root tag in Intellij IDEA/Android Studio
... is a new parentTag tools attribute (added in Android Studio 2.2) that you can use to specify the layout type for a merge tag, which will make the layout render correctly in the layout editor preview.
So using your example:
<merge xmlns:android="http://schemas.android.com/apk/res/android"
...