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How to track child process using strace?
...c
(anon)
+-- touch /tmp/ppp.sleep
+-- killall -HUP pppd
+-- amixer set Speaker 70%
+-- amixer set Speaker 70%
+-- amixer set Speaker 70%
+-- amixer set Speaker 70%
+-- amixer set Speaker 50%
+-- amixer set Speaker 70%
`-- amixer set Speaker 50%
The output can be used to help na...
Maven2 property that indicates the parent directory
...
Try setting a property in each pom to find the main project directory.
In the parent:
<properties>
<main.basedir>${project.basedir}</main.basedir>
</properties>
In the children:
<properties&...
Unit testing that events are raised in C# (in order)
...d AssertPropertyChanged<T>(T instance, Action<T> actionPropertySetter, string expectedPropertyName) where T : INotifyPropertyChanged
{
string actual = null;
instance.PropertyChanged += delegate (object sender, PropertyChangedEventArgs e)
{
actual =...
How to count lines in a document?
...
Use wc:
wc -l <filename>
This will output the number of lines in <filename>:
$ wc -l /dir/file.txt
3272485 /dir/file.txt
Or, to omit the <filename> from the result use wc -l < <filename>:
$ wc -l < /dir/file...
Remove all files except some from a directory
...o the following -
export GLOBIGNORE=*.php:*.sql
rm *
export GLOBIGNORE=
Setting GLOBIGNORE like this ignores php and sql from wildcards used like "ls *" or "rm *". So, using "rm *" after setting the variable will delete only txt and tar.gz file.
...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...ed_non_unique<member<employee,std::string,&employee::name> > >
> employee_set;
Note that this is specified in exactly the same manner as a multi_index_container of actual employee objects: member takes care of the extra dereferencing needed to gain access to employee::name. A similar functiona...
Border around specific rows in a table?
...
Understood, I needed that too. Enclose the set of rows you want a border around in their own tbody, and the above css will create a border around the set of them -- i.e., a top border on the top row, a bottom border on the bottom row, and left and right borders on all...
Regular expression to match non-ASCII characters?
...+
It matches any character which is not contained in the ASCII character set (0-127, i.e. 0x0 to 0x7F).
You can do the same thing with Unicode:
[^\u0000-\u007F]+
For unicode you can look at this 2 resources:
Code charts list of Unicode ranges
This tool to create a regex filtered by Unicod...
Python dictionary: Get list of values for list of keys
...: 2, 'three': 3}
mykeys = ['three', 'one'] # if there are many keys, use a set
[mydict[k] for k in mykeys]
=> [3, 1]
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Why are side-effects modeled as monads in Haskell?
...o, you're still missing my point here. Of course you wouldn't use that mindset for any of those specific types, because they have clear, meaningful structure. When I say "arbitrary monads" I mean "you don't get to pick which one"; the perspective here is from inside the quantifier, so thinking of m ...