大约有 47,000 项符合查询结果（耗时：0.0787秒） [XML]
AWS MySQL RDS vs AWS DynamoDB [closed]
I've been using MySQL for a fair while now and I'm comfortable with its structure & SQL Queries etc.
4 Answers
...
How would I skip optional arguments in a function call?
...ify everything up until that last parameter. Generally if you want to mix-and-match, you give them default values of '' or null, and don't use them inside the function if they are that default value.
share
|
...
Safe (bounds-checked) array lookup in Swift, through optional bindings?
If I have an array in Swift, and try to access an index that is out of bounds, there is an unsurprising runtime error:
19 A...
How can I get the current screen orientation?
I just want to set some flags when my orientation is in landscape so that when the activity is recreated in onCreate() i can toggle between what to load in portrait vs. landscape. I already have a layout-land xml that is handling my layout.
...
How to link a Facebook app with an existing fan page
Now that Facebook has depreciated the landing pages for apps , how do I get my app to point to the Fan page for it's landing page?
...
Function in JavaScript that can be called only once
...y once, in each time after the first it won't be executed. I know from C++ and Java about static variables that can do the work but I would like to know if there is a more elegant way to do this?
...
What does tree-ish mean in Git?
...ately leads to a (sub)directory
tree (Git refers to directories as "trees" and "tree objects").
In the original poster's case, foo is a directory that he wants to
specify. The correct way to specify a (sub)directory in Git is to use this
"tree-ish" syntax (item #15 from the Git revisions documentat...
HTML5 textarea placeholder not appearing
...not appear. It seems as though it may be covered up with some blank spaces and tabs. When you focus on the text area and delete from where the cursor puts itself, then leave the text area, the proper placeholder then appears.
...
Using try vs if in python
...er LBYL style ("look before you leap"). To me, it's a matter of efficiency and readability.
In your example (say that instead of returning a list or an empty string, the function were to return a list or None), if you expect that 99 % of the time result will actually contain something iterable, I'd...
Difference between and text
... you more layout freedom over the design of the button. In all its intents and purposes, it seemed excellent at first, but various browser quirks make it hard to use at times.
In your example, IE6 will send text to the server, while most other browsers will send nothing. To make it cross-browser c...