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Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?
...gh return values and never exceptions, and it's difficult to combine these error handling mechanisms in a single performant way.
– Jeff Wilcox
May 11 '10 at 9:15
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App Inventor 2 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录...
... App Inventor 2 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录等
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FTP 客户端拓展
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How to create a directory in Java?
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-1: That is actually a really bad technique to create a directory. The access to the FS is not reserved to a dedicated resource. Between if(!theDir.exists()) and theDir.mkdir() the status could have changed, as well as it could change in bet...
AngularJS For Loop with Numbers & Ranges
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Interesting I don't see an error in the fiddle using Chrome. Which browser?
– Gloopy
May 14 '13 at 1:30
5
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Intellij code formatting, Java annotations on new lines
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I think all the above answers are correct but here is step by step for Mac users:
Click on "IntelliJ IDEA"
Click on "Preferences"
Go "Code Style" on the left navigation window and you will see "Java" listed below it and Click on it...
python list in sql query as parameter
...b'] and did performed the same query. Doing this I got the erroy i.e. Type Error: not all arguments converted during string formatting. How am I supposed to solbe it
– TechJhola
Jan 9 '15 at 19:55
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Find location of a removable SD card
...l Android 4.4, the official Android platform has not supported SD cards at all except for two special cases: the old school storage layout where external storage is an SD card (which is still supported by the platform today), and a small feature added to Android 3.0 where it would scan additional SD...
Constructor of an abstract class in C#
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Far as I know we can't instantiate an abstract class
There's your error right there. Of course you can instantiate an abstract class.
abstract class Animal {}
class Giraffe : Animal {}
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Animal animal = new Giraffe();
There's an instance of Animal right there. You instantiate an abstr...
Average of 3 long integers
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This code will work, but isn't that pretty.
It first divides all three values (it floors the values, so you 'lose' the remainder), and then divides the remainder:
long n = x / 3
+ y / 3
+ z / 3
+ ( x % 3
+ y % 3
+ z % 3
)...
解决Scrapy警告:You do not have a working installation of the service_i...
...module使用scrapy进行爬虫项目的操作时，出现如下错误：从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从...