大约有 40,000 项符合查询结果（耗时：0.0703秒） [XML]
Why can't variable names start with numbers?
... with a digit. One way to do it might be to allow anything matching [A-Za-z_]+ that is NOT a keyword or number literal. The problem is that it would lead to weird things like 0xdeadpork being allowed, but not 0xdeadbeef. Ultimately, I think we should be fair to all meats :P.
When I was first learni...
Python: How to create a unique file name?
...ry clear, but if all you need is a unique file name...
import uuid
unique_filename = str(uuid.uuid4())
share
|
improve this answer
|
follow
|
...
HtmlSpecialChars equivalent in Javascript?
...
Underscore.js provides a function for this:
_.escape(string)
Escapes a string for insertion into HTML, replacing &, <, >, ", and ' characters.
http://underscorejs.org/#escape
It's not a built-in Javascript function, but if you are already usin...
Why do I get “unresolved external symbol” errors when using templates? [duplicate]
...
@jbx I'm saying that for things like basic_string<T> you're only ever going to be using it with char or wchar_t so if putting all the implementation in the header is a concern, instantiating it in the cpp is an option. The code is yours to command, not vice-ve...
What's the best way to cancel event propagation between nested ng-click calls?
...rl" class="overlay" ng-click="hideOverlay()">
<img src="http://some_src" ng-click="nextImage($event)"/>
</div>
$scope.nextImage = function($event) {
$event.stopPropagation();
// Some code to find and display the next image
}
...
How to implement the Android ActionBar back button?
...wActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.ParentActivity" />
</activity>
See here for further reading.
share
|
...
What is Rack middleware?
...NFO WEBrick 1.3.1
[2012-02-19 22:39:26] INFO ruby 1.9.3 (2012-01-17) [x86_64-darwin11.2.0]
[2012-02-19 22:39:26] INFO WEBrick::HTTPServer#start: pid=16121 port=9292
Let's test our new JSON server by either curling or visiting the url http://localhost:9292/hello.json and voila:
$ curl http://lo...
Can I see changes before I save my file in Vim?
...
http://vim.wikia.com/wiki/Diff_current_buffer_and_the_original_file
Here is a function and command to see a diff between the currently edited file and its unmodified version in the filesystem. Just put this in your vimrc or in the plugin directory, op...
Encoding URL query parameters in Java
...oded / sub-delims / ":" / "@"
unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
pct-encoded = "%" HEXDIG HEXDIG
sub-delims = "!" / "$" / "&" / "'" / "(" / ")" / "*" / "+" / "," / ";" / "="
It also seems that only percent-encoded spaces are valid, as I doubt that space is an ALPHA or a...
Passing additional variables from command line to make
...r, it only has an effect if the variable is not yet defined):
FOO?=default_value_if_not_set_in_environment
Note that certain variables are not inherited from environment:
MAKE is gotten from name of the script
SHELL is either set within a makefile, or defaults to /bin/sh (rationale: commands ar...