semantics

What is value semantics and reference semantics and what is the difference between them? Can you please show me with an example in c. I guess in reference semantics that you just send an pointer to another function then it is reference semantics? I find it hard to grasp what value semantics is? If I only use an int as an argument and then let say return an int from that function then the function uses value semantics? And how does side effects affect this? There must be other examples of value semantics then I mentioned if I were right about it. Can you please give me examples of that. If a

Say you, or I, have coded an HTML element... <a id='hydrogen' href='#'>H</a> ...and some :hover CSS... #hydrogen:hover { background:red; } ...and now we want to put a fancy hand cursor when hovering. There's two options for this: apply to stateless element: #hydrogen { cursor:pointer; } or, apply to :hover state. #hydrogen:hover { color:red; cursor:pointer; } My question: is there any reason(s) why one way is decisively better than the other? ...or is it tomato, tomato? Dustin Laine Compatibility: IE6 and below only recognize the :hover pseudo class on a elements. They are both the same,

having downloaded and trained SyntaxNet , I am trying to write a program that can open new/existed files, for example AutoCAD files, and save the files in an specific directory by analyzing the text: open LibreOffice file X . considering the output of SyntaxNet as: echo "save AUTOCAD file X in directory Y" | ./test.sh > output.txt Input: save AUTOCAD file X in directory Y Parse: save VB ROOT +-- X NNP dobj | +-- file NN compound | +-- AUTOCAD CD nummod +-- directory NN nmod +-- in IN case +-- Y CD nummod First I thought about changing the parsed text to XML format then parse the XML file with

This question already has an answer here: Which is more correct: <h1><a>…</a></h1> OR <a><h1>…</h1></a> 7 answers I'm wondering which of the following two orders is semantically correct in HTML: 1. <h1><a>Header</a></h1> 2. <a><h1>Header</h1></a> Paolo Bergantino <h1><a>Header</a></h1> <h1> is a block-level element and <a> is not, it is syntactically invalid HTML to have block level elements inside inline elements (at least until HTML5) which is how the other way would be. Paul D. Waite This answer on a duplicate question is better than mine: https://stackoverflow.com/a/7023551/20578 But, for

Inspired by this question about caching small integers and strings I discovered the following behavior which I don't understand. >>> 1000 is 10**3 False I thought I understood this behavior: 1000 is to big to be cached. 1000 and 10**3 point to 2 different objects. But I had it wrong: >>> 1000 is 1000 True So, maybe Python treats calculations differently from 'normal' integers. But that assumption is also not correct: >>> 1 is 1**2 True How can this behavior be explained? Martijn Pieters There are two separate things going on here: Python stores int literals (and other literals) as constants

This question already has an answer here: Mysterious for loop in python 5 answers I understand what the in operator does in this code: some_list = [1, 2, 3, 4, 5] print(2 in some_list) I also do understand that i will take on each value of the list in this code: for i in [1, 2, 3, 4, 5]: print(i) I am curious if the in operator used in the for loop is the same as the in operator used in the first code. They are the same concept but not the same operators. In the print(2 in some_list) example, in is an operator that handles several different situations. The Python docs for the in operator give