大约有 47,000 项符合查询结果（耗时：0.0603秒） [XML]
How to tell when UITableView has completed ReloadData?
...nvestigation, I find that the table view sends tableView:numberOfSections: and tableView:numberOfRowsInSection: to its data source before returning from reloadData. If the delegate implements tableView:heightForRowAtIndexPath:, the table view also sends that (for each row) before returning from rel...
Default background color of SVG root element
...ser solution currently would be to stick a <rect> element with width and height of 100% and fill="red" as the first child of the <svg> element, for example:
<rect width="100%" height="100%" fill="red"/>
s...
Round to 5 (or other number) in Python
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I don't know of a standard function in Python, but this works for me:
Python 2
def myround(x, base=5):
return int(base * round(float(x)/base))
Python3
def myround(x, base=5):
return base * round(x/base)
It is easy to see why the a...
Volley Android Networking Library
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$ git clone https://android.googlesource.com/platform/frameworks/volley
$ cd volley
$ android update project -p .
$ ant jar
Then, copy bin/volley.jar into your libs/ folder and off you go!
source
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To ternary or not to ternary? [closed]
...ve come across many programmers that are completely against ever using it, and some that use it too often.
54 Answers
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How to get number of entries in a Lua table?
...ind an answer. The Lua # operator only counts entries with integer keys, and so does table.getn :
8 Answers
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How to test an SQL Update statement before running it?
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In addition to using a transaction as Imad has said (which should be mandatory anyway) you can also do a sanity check which rows are affected by running a select using the same WHERE clause as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
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How to securely save username/password (local)?
...hich you need to log into first.
The account details consist of username and password, and they need to be saved locally.
It's just a matter of security, so other people using the same computer can't see everyone's personal data.
What is the best/most secure way to save this data?
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Reading specific lines only
... loop to read a file, but I only want to read specific lines, say line #26 and #30. Is there any built-in feature to achieve this?
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break out of if and foreach
I have a foreach loop and an if statement. If a match is found i need to ultimately break out of the foreach.
4 Answers
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