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The way to check a HDFS directory's size?
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Prior to 0.20.203, and officially deprecated in 2.6.0:
hadoop fs -dus [directory]
Since 0.20.203 (dead link) 1.0.4 and still compatible through 2.6.0:
hdfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info and...
How to get thread id from a thread pool?
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@petrbel He's answering the question title perfectly, and the thread id is close enough in my opinion when the OP requests "something like 'thread #3 of 5".
– CorayThan
Sep 1 '15 at 19:20
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What's the most efficient test of whether a PHP string ends with another string?
...eedle), but this method requires that and copying it in full, and possibly converting the entire thing into lowercase to boot.
– David Harkness
Aug 9 '16 at 6:01
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Setting WPF image source in code
... Okay, but isn't there some method or class that the XAML parser uses to convert the simple path string to an ImageSource? Couldn't we just use that?
– Qwertie
Jun 2 '11 at 16:48
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How do I turn off PHP Notices?
...ing JSON or XML or whatever, you might want to turn these off. Or at least convert them into exceptions and handle them accordingly.
– TheRealChx101
Oct 10 '18 at 20:18
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How to get the children of the $(this) selector?
... for what it's worth: jQuery("img", this) is internally converted into: jQuery(this).find("img") So the second is ever so slightly faster. :)
– Paul Irish
Jan 8 '10 at 23:49
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How to avoid type safety warnings with Hibernate HQL results?
...ateUtils.listAndCast(q);
I'll get a compile error: Type mismatch: cannot convert from List to ArrayList
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Service vs IntentService in the Android platform
... can be done with an IntentService that cannot be done with a Service (and vice-versa)?
11 Answers
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C# version of java's synchronized keyword?
...: only apply thread-safety when you know you actually are going to use it (and test it).
For the method-level stuff, there is [MethodImpl]:
[MethodImpl(MethodImplOptions.Synchronized)]
public void SomeMethod() {/* code */}
This can also be used on accessors (properties and events):
private int ...
获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...除的数据（FAT文件系统格式描述）Getting-the-File-System-Image-and-Deleted-Data-RecoveryFAT 文件格式 数据恢复大多数的 flash驱动器的文件系统都采用 FAT 格式。下面介绍下这种系统格式， FAT 系统由三个主要部分构成：保留区域、 表 (FAT 区...