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Immutable class?
How can one make a Java class immutable, what is the need of immutability and is there any advantage to using this?
13 Answ...
What is duck typing?
I came across the term duck typing while reading random topics on software online and did not completely understand it.
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git: abort commit in the middle of typing message
.... If you previously saved the file to its original path, delete everything and write the empty file first (an empty commit message will abort the commit).
Now, when you're ready to commit "for reals", use the message file you saved at the alternate path.
Alternately, copy the commit message into o...
How can I remove non-ASCII characters but leave periods and spaces using Python?
...rom the file with no non-ASCII characters. However, I want to leave spaces and periods. At present, I'm stripping those too. Here's the code:
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How to declare and add items to an array in Python?
...To initialize an empty dictionary use {} or dict()
Dictionaries have keys and values
my_dict = {'key':'value', 'another_key' : 0}
To extend a dictionary with the contents of another dictionary you may use the update method
my_dict.update({'third_key' : 1})
To remove a value from a dictionary
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How to filter by IP address in Wireshark?
...ditions:
OR condition:
(ip.src==192.168.2.25)||(ip.dst==192.168.2.25)
AND condition:
(ip.src==192.168.2.25) && (ip.dst==74.125.236.16)
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Why doesn't std::queue::pop return value.?
...element is unsafe in the presence of exceptions (having to return by value and thus creating a copy).
Consider this scenario (with a naive/made up pop implementation, to ilustrate my point):
template<class T>
class queue {
T* elements;
std::size_t top_position;
// stuff here
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Why do I get a warning icon when I add a reference to an MEF plugin project?
...test the core class of a plugin by directly referencing the plugin project and instantiating the plugin class. When I create a test Console App project and add a project reference to the plugin project, I get a warning icon (yellow triangle with exclamation mark) next to the reference in the Referen...
How to get CRON to call in the correct PATHs
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I used /etc/crontab. I used vi and entered in the PATHs I needed into this file and ran it as root. The normal crontab overwrites PATHs that you have set up. A good tutorial on how to do this.
The systemwide cron file looks like this:
This has the userna...
php var_dump() vs print_r()
What is the difference between var_dump() and print_r() in terms of spitting out an array as string?
12 Answers
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