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Best way to create an empty map in Java
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1) If the Map can be immutable:
Collections.emptyMap()
// or, in some cases:
Collections.<String, String>emptyMap()
You'll have to use the latter sometimes when the compiler cannot automatically figure out what kind of Map is needed (this is called type inference). For examp...
How to convert an array of strings to an array of floats in numpy?
...ding the data in as a list, just do np.array(map(float, list_of_strings)) (or equivalently, use a list comprehension). (In Python 3, you'll need to call list on the map return value if you use map, since map returns an iterator now.)
However, if it's already a numpy array of strings, there's a bett...
What is the expected syntax for checking exception messages in MiniTest's assert_raises/must_raise?
What is the expected syntax for checking exception messages in MiniTest's assert_raises / must_raise ?
4 Answers
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Is there a way to use two CSS3 box shadows on one element?
...y? I'm on mobile at the moment so I can't check; but I'd not heard that reported before...I'll look into that, tomorrow, after work. =/
– David says reinstate Monica
Dec 19 '11 at 3:04
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How to obtain the last path segment of a URI
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is that what you are looking for:
URI uri = new URI("http://example.com/foo/bar/42?param=true");
String path = uri.getPath();
String idStr = path.substring(path.lastIndexOf('/') + 1);
int id = Integer.parseInt(idStr);
alternatively
URI uri = new URI("...
str.startswith with a list of strings to test for
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str.startswith allows you to supply a tuple of strings to test for:
if link.lower().startswith(("js", "catalog", "script", "katalog")):
From the docs:
str.startswith(prefix[, start[, end]])
Return True if string starts with the prefix, otherwise return False. prefix can also b...
git - Find commit where file was added
...f-filter=A -- foo.js
Check the documentation. You can do the same thing for Deleted, Modified, etc.
https://git-scm.com/docs/git-log#Documentation/git-log.txt---diff-filterACDMRTUXB82308203
I have a handy alias for this, because I always forget it:
git config --global alias.whatadded 'log --dif...
What is the purpose of the -m switch?
...witch -m to allow modules to be located using the Python module namespace for execution as scripts. The motivating examples were standard library modules such as pdb and profile, and the Python 2.4 implementation is fine for this limited purpose.
So you can specify any module in Python's search pa...
Why do we need boxing and unboxing in C#?
... just a number). So, what you do is this: you make a new object that can store the int and then you assign a reference to that object to o. We call this process "boxing."
So, if you don't care about having a unified type system (i.e., reference types and value types have very different representat...
apache to tomcat: mod_jk vs mod_proxy
...at are the advantages and disadvantages of using mod_jk and mod_proxy for fronting a tomcat instance with apache?
3 Ans...