大约有 46,000 项符合查询结果（耗时：0.0612秒） [XML]
Reference: What is variable scope, which variables are accessible from where and what are “undefined
...pplication. The variable $foo has a certain scope within which it is valid and only code in the same scope has access to the variable.
How is a scope defined in PHP?
Very simple: PHP has function scope. That's the only kind of scope separator that exists in PHP. Variables inside a function are onl...
What is the difference between Set and List?
What is the fundamental difference between the Set<E> and List<E> interfaces?
27 Answers
...
MongoDB drop every database
I would like to know if there're a command to drop every databases from my MongoDB?
8 Answers
...
Is there a Pattern Matching Utility like GREP in Windows?
Is there a similar utility to grep available from the Windows Command Prompt, or is there a third party tool for it?
32 A...
Is it possible to decompile a compiled .pyc file into a .py file?
...
Uncompyle6 works for Python 3.x and 2.7 - recommended option as it's most recent tool, aiming to unify earlier forks and focusing on automated unit testing. The GitHub page has more details.
if you use Python 3.7+, you could also try decompile3, a fork of...
Are memory leaks ever ok? [closed]
...ever OK to do this?" but rather "Is there ever a good reason to do this?" And "hunting down that memory leak is a pain" isn't a good reason.
I like to keep things simple. And the simple rule is that my program should have no memory leaks.
That makes my life simple, too. If I detect a memory lea...
Why do I need to override the equals and hashCode methods in Java?
...n conjunction with all hash-based collections, including HashMap, HashSet, and Hashtable.
Let's try to understand it with an example of what would happen if we override equals() without overriding hashCode() and attempt to use a Map.
Say we have a class like this and that two objects of MyClass are...
How to solve “Plugin execution not covered by lifecycle configuration” for Spring Data Maven Builds
I am trying to work with Spring Data and Neo4j . I started by trying to follow this guide linked to by the main site. In particular I based my pom.xml off of the "Hello, World!" example file . Here is a snip from my pom.xml for the plugin that is causing the issues...
...
How do I use $scope.$watch and $scope.$apply in AngularJS?
I don't understand how to use $scope.$watch and $scope.$apply . The official documentation isn't helpful.
6 Answers
...
Matrix Transpose in Python
...
@AntonyHatchkins This is not needed with Python 3.0 and above. There, zip already returns an iterator: docs.python.org/3.0/whatsnew/…
– xuiqzy
May 9 at 13:06
...