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Popup弹出菜单扩展 · App Inventor 2 中文网
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可以使用哪些HTML标签取决于实现。您可以找到相关提示这里或这里。
图标名称
符号文件的名称指的是资源文件，即上传到AI2项目的文件。
可以省略”.png”或”.jpg”文件扩展名。扩展会自动搜索。名...
mkdir's “-p” option
...r fingertips: man mkdir yields this about -p switch:
-p, --parents
no error if existing, make parent directories as needed
Use case example: Assume I want to create directories hello/goodbye but none exist:
$mkdir hello/goodbye
mkdir:cannot create directory 'hello/goodbye': No such file or d...
(grep) Regex to match non-ASCII characters?
... PCRE.
– Alix Axel
Jan 23 '10 at 20:05
10
That's exactly right. However you have to use pcregrep,...
Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
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– Steve Campbell
Sep 10 '12 at 13:05
1
This is great, just misses the root element. Add this to...
Correct way to convert size in bytes to KB, MB, GB in JavaScript
...their method is ambiguous and confusing. I noticed the other examples have errors such as using KB instead of kB to represent a kilobyte so I decided to write a function that will solve each of these cases using the range of currently accepted units of measure.
There is a formatting bit at the end ...
Stock ticker symbol lookup API [closed]
...ange prefix. For example, if you query "BTIM", you'll get a "Bad Request" error but "AMEX:BTIM" works. A few stocks don't work even with the exchange prefix. For example, querying "FTWRD" and "NASDAQ:FTWRD" both generate "Bad Request" errors even though Google Finance does have information for th...
Python String and Integer concatenation [duplicate]
... string = "string{0}".format(i)
What you did (range[1,10]) is
a TypeError since brackets denote an index (a[3]) or a slice (a[3:5]) of a list,
a SyntaxError since [1,10] is invalid, and
a double off-by-one error since range(1,10) is [1, 2, 3, 4, 5, 6, 7, 8, 9], and you seem to want [0, 1, 2...
npm global path prefix
...m refuses to install jslint globally, though. npm install -g jslint fails. Error: EACCES, open '/Users/user/.npm/564fcf84-jslint.lock'
– Steven Lu
Feb 12 '13 at 20:06
2
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How to configure slf4j-simple
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thanks I set "org.slf4j.simpleLogger.defaultLogLevel" to "error" in System.properties, however slf4j still log INFO level messages. Any idea? BTW, where should I put simplelogger.properties?
– Gelin Luo
Jan 27 '13 at 9:27
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Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...如果你需要返回一个String对象，并且你知道它最终会需要连接到一个StringBuffer，请修改你的实现方式，避免直接进行连接操作，应该采用创建一个临时对象来做这个操作。
当从输入的数据集中抽取出Strings的时候，尝试返回原数...