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创建自定义 TinyWebDB 服务 · App Inventor 2 中文网
...ed on the web instead of a particular phone, TinyWebDB can be used to facilitate communication between phones and apps (e.g., multi-player games).
By default, the TinyWebDB component stores data on a test service provided by App Inventor, http://tinywebdb.appinventor.mit.edu/ . This service is help...
How to print from GitHub
If I want to print a markdown file from GitHub as it appears on screen, for example:
https://github.com/RestKit/RestKit/blob/master/Docs/Object%20Mapping.md
...
Convert Iterator to ArrayList
Given Iterator<Element> , how can we convert that Iterator to ArrayList<Element> (or List<Element> ) in the best and fastest way possible, so that we can use ArrayList 's operations on it such as get(index) , add(element) , etc.
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What happens if you call erase() on a map element while iterating from begin to end?
...g code I loop through a map and test if an element needs to be erased. Is it safe to erase the element and keep iterating or do I need to collect the keys in another container and do a second loop to call the erase()?
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Return empty cell from formula in Excel
I need to return an empty cell from an Excel formula, but it appears that Excel treats an empty string or a reference to an empty cell differently than a true empty cell. So essentially I need something like
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The Web Application Project […] is configured to use IIS. The Web server […] could not be found.
...rsion's folder in C:\(Windows)\Microsoft.NET\Framework\(dotnetver)\
(substituting the bracketed folders for the right folders on your PC) and run this command
aspnet_regiis.exe -i
Next once that's run and finished, sometimes running
iisreset
from the command line helps, sometimes you don't ne...
How to add custom method to Spring Data JPA
...sider the below example where I will get all the crud and finder functionality working by default and if I want to customize a finder then that can be also done easily in the interface itself.
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Unable to import a module that is definitely installed
After installing mechanize , I don't seem to be able to import it.
32 Answers
32
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Checking if an object is null in C#
I would like to prevent further processing on an object if it is null.
17 Answers
17
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SQL query return data from multiple tables
...ing two or more tables using an inner join (See the wikipedia entry for additional info)
How to use a union query
Left and Right Outer Joins (this stackOverflow answer is excellent to describe types of joins)
Intersect queries (and how to reproduce them if your database doesn't support them) - this ...