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How do I execute a command and get the output of the command within C++ using POSIX?
..." << line << '\n';
# if reading stdout stopped at EOF then reset the state:
if (proc.eof() && proc.fail())
proc.clear();
// read child's stderr
while (std::getline(proc.err(), line))
std::cout << "stderr: " << line << '\n';
}
...
How to replace an entire line in a text file by line number
...oes not seem to work. If you guys have problems with sed and its delimiter setting capabilities you may want to have a look at this: grymoire.com/Unix/Sed.html#uh-2 It says the first character behind the s determines the delimiter. So to change your command to use for example the # it would be like...
API vs. Webservice [closed]
...sy of Wikipedia) are:
API
An application programming interface (API) is a set of routines, data structures, object classes and/or protocols provided by libraries and/or operating system services in order to support the building of applications.
Webservice
A Web service (also Web Service) is defin...
How to list all users in a Linux group?
...o works for secondary groups only, it won't list users who have that group set as primary since the primary group is stored as GID (numeric group ID) in the file /etc/passwd.
grep <your_group_name> /etc/group
share
...
Serializing class instance to JSON
...s that the JSON encoder json.dumps() only knows how to serialize a limited set of object types by default, all built-in types. List here: https://docs.python.org/3.3/library/json.html#encoders-and-decoders
One good solution would be to make your class inherit from JSONEncoder and then implement th...
What is the difference between compare() and compareTo()?
...ch as sort() or for use by sorting data structures such as TreeMap and TreeSet. You might want to create a Comparator object for the following:
Multiple comparisons. To provide several different ways to sort something. For example, you might want to sort a Person class by name, ID, age, height, .....
Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
...ome methods like String.Concat. For example, if you have a string variable set to null, C# won't replace it with String.Empty if you try to call a method on it.
– Botz3000
May 30 '12 at 10:32
...
Difference between the Apache HTTP Server and Apache Tomcat? [closed]
...
True. And many people still use an extra Apache setup besides their Tomcat.. which is unnecessary in most cases.
– Marco Schoolenberg
Jan 4 '17 at 16:20
...
How does JavaScript .prototype work?
...gures the prototype chain when using the class syntax),
Object.create will set the supplied argument as the [[Prototype]] of the resulting object,
Object.getPrototypeOf and Object.setPrototypeOf (get/set the [[Prototype]] after object creation), and
The standardized accessor (ie. getter/setter) prop...
Difference between map, applymap and apply methods in Pandas
...taframe is only modified by either reassigning df = modified_df or if you set inplace=True flag. Also dataframe will change if you pass a dataframe to a function by reference and the function modifies the dataframe
– muon
Apr 13 '16 at 16:30
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