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How do I clone a Django model instance object and save it to the database?
...ere.
Official docs on copying model instances: https://docs.djangoproject.com/en/2.2/topics/db/queries/#copying-model-instances
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Multiline bash commands in makefile
...cters (‘@’, ‘-’, and ‘+’) are interpreted differently.
https://www.gnu.org/software/make/manual/html_node/One-Shell.html
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How to manually trigger validation with jQuery validate?
...e form... to validate only 1 field, the correct way is this: stackoverflow.com/a/12195091/114029
– Leniel Maccaferri
Jul 12 '13 at 15:50
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Is there a Python equivalent of the C# null-coalescing operator?
In C# there's a null-coalescing operator (written as ?? ) that allows for easy (short) null checking during assignment:
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Eclipse RCP Plug-in开发自学教程（Eclipse3.6） - 文档下载 - 清泛网 - ...
...望大家谅解并使用新版本的教程。
本教程由本人发布在www.ceclipse.org以及本人的blog中，希望对大家有所帮助，也希望各位喜欢分享的朋友在转载时注明，谢谢。
手头有一些不错的Eclipse资料，只可惜它用的Eclipse还是3.3版本的...
How to adjust layout when soft keyboard appears
...ding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width=...
How do you change the server header returned by nginx?
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Like Apache, this is a quick edit to the source and recompile. From Calomel.org:
The Server: string is the header which
is sent back to the client to tell
them what type of http server you are
running and possibly what version.
This string is used by places like
Al...
Difference between __str__ and __repr__?
What is the difference between __str__ and __repr__ in Python?
23 Answers
23
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How do we control web page caching, across all browsers?
Our investigations have shown us that not all browsers respect the HTTP cache directives in a uniform manner.
29 Answers
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How to put multiple statements in one line?
... want is not possible with Python (which makes Python close to useless for command-line one-liner programs). Even explicit use of parentheses does not avoid the syntax exception. You can get away with a sequence of simple statements, separated by semi-colon:
for i in range(10): print "foo"; print "...