大约有 40,000 项符合查询结果（耗时：0.0478秒） [XML]
Count number of occurrences of a pattern in a file (even on same line)
...Search | cut -d ":" -f 4 | sort -n | uniq -c
Sample:
grep "SMTP connect from unknown" maillog | cut -d ":" -f 4 | sort -n | uniq -c
6 SMTP connect from unknown [188.190.118.90]
54 SMTP connect from unknown [62.193.131.114]
3 SMTP connect from unknown [91.222.51.253]
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What does the [Flags] Enum Attribute mean in C#?
From time to time I see an enum like the following:
12 Answers
12
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Why does sudo change the PATH?
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This "annoying function" prevents you from getting trojaned. I say forcing a specific $PATH is a feature, not a bug---it makes you write out the full path to a program that's outside the $PATH.
– Chris Jester-Young
May 18 '0...
Dictionary vs Object - which is more efficient and why?
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Have you tried using __slots__?
From the documentation:
By default, instances of both old and new-style classes have a dictionary for attribute storage. This wastes space for objects having very few instance variables. The space consumption can become acut...
log messages appearing twice with Python Logging
...odules were loaded, the logger variable used, was not the one instantiated from one of my classes, but the logger variable present on Python3 cache, and the handler was added every 60 sec by an AppScheduler which I configured. So, this if not logger.handlers is a pretty smart way to avoid this type ...
Why does LayoutInflater ignore the layout_width and layout_height layout parameters I've specified?
... visible as small red square if layout parameters are successfully applied from XML (red.xml):
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="25dp"
android:layout_height="25dp"
android:background...
Why do Lua arrays(tables) start at 1 instead of 0?
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Lua is descended from Sol, a language designed for petroleum engineers with no formal training in computer programming. People not trained in computing think it is damned weird to start counting at zero. By adopting 1-based array and string...
What does iota of std::iota stand for?
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From the original SGI STL documentation:
The name iota is taken from the programming language APL.
In his Turing Award lecture, Ken Iverson (inventor of APL) said this:
For example, the integer function denoted by ...
Proper indentation for Python multiline strings
...anging indents" here... Especially because if you change the variable name from string to text or anything of a different length, then you now need to update the indentation of literally every single line of the multiline string just to get it to match up with the """ properly. Indentation strategy ...
How does push notification technology work on Android?
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From what I've heard during an Android developers conference in Israel:
There is simply a TCP socket waiting in accept mode on a cloud Google server. The TCP connection had been initiated by the Google Play application. That...