大约有 10,900 项符合查询结果（耗时：0.0475秒） [XML]
How does IPython's magic %paste work?
...
You can't copy to IPython directly. This are the steps:
Copy the lines you want to copy into IPython into the clipboard
Enter %paste into IPython
Press enter
Profit!
...
Is it a good idea to index datetime field in mysql?
I am working on designing a large database. In my application I will have many rows for example I currently have one table with 4 million records. Most of my queries use datetime clause to select data. Is it a good idea to index datetime fields in mysql database?
...
What is the most efficient way to store tags in a database?
...wered Dec 2 '08 at 15:05
Simon ScarfeSimon Scarfe
8,10833 gold badges2525 silver badges3131 bronze badges
...
Hex representation of a color with alpha channel?
...exadecimal notation for an RGBA value" (see CSS Level 3 spec). Instead you can the use rgba() functional notation with decimals or percentages, e.g. rgba(255, 0, 0, 0.5) would be 50% transparent red. RGB channels are 0-255 or 0%-100%, alpha is 0-1.
In CSS 4*, you can specify the alpha channel using...
How to download/checkout a project from Google Code in Windows?
...nstall anything but do want to download an SVN or GIT repository, then you can use this: http://downloadsvn.codeplex.com/
I have nothing to do with this project, but I just used it now and it saved me a few minutes. Maybe it will help someone.
...
How can I check if a key is pressed during the click event with jQuery?
I would like to catch a click event with jQuery and be able to tell if a key was pressed at the same time so I can fork within the callback function based on the keypress event.
...
Rails: Check output of path helper from console
...make helpers for your routes. Sometimes, especially with nested routes, it can get a little confusing to keep track of what URL you'll get for a given route helper method call. Is it possible to, using the Ruby console, see what link a given helper function will generate? For example, given a named ...
How to output messages to the Eclipse console when developing for Android
How can I print messages (like a flag) to the Eclipse console (or log) when developing and debugging an Android app
5 Answe...
bash assign default value
...d not found. Any way to avoid that? Or will I have to stick to the latter? Can someone give an example where the assign default is actually useful?
...
How do I negate a test with regular expressions in a bash script?
...
You can also put the exclamation mark inside the brackets:
if [[ ! $PATH =~ $temp ]]
but you should anchor your pattern to reduce false positives:
temp=/mnt/silo/bin
pattern="(^|:)${temp}(:|$)"
if [[ ! "${PATH}" =~ ${pattern}...