大约有 4,527 项符合查询结果（耗时：0.0205秒） [XML]
Inspect element that only appear when other element is mouse overed/entered
...ecords a portion of the screen directly in a super-optimized GIF. Windows, OS X and Linux.
– fregante
Jul 17 '14 at 7:26
2
...
Expand/collapse section in UITableView in iOS
...t of its section, just like the regular Apple section headers. that's not possible if you simply add a cell at the beginning of the section
– user102008
Apr 20 '11 at 22:25
...
Using i and j as variables in Matlab
...erride them, potentially silently breaking code that does complex maths.
Possible solutions include using ii and jj as loop variables instead, or using 1i whenever i is required to represent the imaginary unit.
share
...
Suppress command line output
...lue of 1, which was just redirected to the null device.
This syntax is (loosely) borrowed from many Unix shells, but you do have to be careful because there are subtle differences between the shell syntax and CMD.EXE.
Update: I know the OP understands the special nature of the "file" named NUL I'm...
Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
... that do not have this parent page tables etc. copy problem are vfork and posix_spawn. But if you do not feel like rewriting chunks of subprocess.Popen in terms of vfork/posix_spawn, consider using suprocess.Popen only once, at the beginning of your script (when Python's memory footprint is minimal...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
...ual suggest using #!/bin/bash was wrong and bash functionality would be lost by doing so.
6 Answers
...
Are parallel calls to send/recv on the same socket valid?
...
POSIX defines send/recv as atomic operations, so assuming you're talking about POSIX send/recv then yes, you can call them simultaneously from multiple threads and things will work.
This doesn't necessarily mean that they'll ...
Use latest version of Internet Explorer in the webbrowser control
... 7. I have changed to 9 by the article Browser Emulation , but how is it possible to use the latest version of the installed Internet Explorer in a webbrowser control?
...
Handle file download from ajax post
I have a javascript app that sends ajax POST requests to a certain URL. Response might be a JSON string or it might be a file (as an attachment). I can easily detect Content-Type and Content-Disposition in my ajax call, but once I detect that the response contains a file, how do I offer the client t...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
...
HttpClient has been designed to be re-used for multiple calls. Even across multiple threads.
The HttpClientHandler has Credentials and Cookies that are intended to be re-used across calls. Having a new HttpClient instance requires re-setting up all of that stuff.
Also, the DefaultRequestHeaders...