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What is the point of function pointers?
...jects) for the same result.
The functors have a number of advantages over raw function pointers, due to their object nature, notably:
They may present several overloads of the operator()
They can have state / reference to existing variables
They can be built on the spot (lambda and bind)
I pers...
How can I read a large text file line by line using Java?
...u can skip the InputStream and use FileReader.
InputStream ins = null; // raw byte-stream
Reader r = null; // cooked reader
BufferedReader br = null; // buffered for readLine()
try {
String s;
ins = new FileInputStream("textfile.txt");
r = new InputStreamReader(ins, "UTF-8"); // leave c...
What are invalid characters in XML
.... */
Basically, the control characters and characters out of the Unicode ranges are not allowed.
This means also that calling for example the character entity  is forbidden.
1.2. In XML 1.1
Reference: see XML recommendation 1.1, §2.2 Characters, and 1.3 Rationale and list of changes f...
Jquery Ajax Posting json to webservice
...tive covers why the JSON is being URLEncoded.
I'd advise against passing a raw, manually-serialized JSON string into your method. ASP.NET is going to automatically JSON deserialize the request's POST data, so if you're manually serializing and sending a JSON string to ASP.NET, you'll actually end u...
Indent multiple lines quickly in vi
...om line
Ex commands
These are useful when you want to indent a specific range of lines, without moving your
cursor.
:< and :> Given a range, apply indentation e.g.
:4,8> indent lines 4 to 8, inclusive
Indenting using markers
Another approach is via markers:
ma Mark top of bloc...
How to get the caller's method name in the called method?
...file and file[0] + file[-1] != '<>': IndexError: string index out of range Can u please provide suggestion. Thanx in advance.
– Pooja
Aug 13 '14 at 11:07
...
How to implement __iter__(self) for a container object (Python)
... next(rev) # note no need to call iter()
'm'
>>> nums = Reverse(range(1,10))
>>> next(nums)
9
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Apply pandas function to column to create multiple new columns?
...I usually do this using zip:
>>> df = pd.DataFrame([[i] for i in range(10)], columns=['num'])
>>> df
num
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
>>> def powers(x):
>>> return x, x**2, x**3, x**4, x**5, x**6
>>> df[...
Why does “return list.sort()” return None, not the list?
... sorted list.
It's more convenient.
l1 = []
n = int(input())
for i in range(n):
user = int(input())
l1.append(user)
sorted(l1,reverse=True)
list.sort() method modifies the list in-place and returns None.
if you still want to use sort you can do this.
l1 = []
n = int(input())
for i...
GitHub relative link in Markdown file
...er relative links on the site.
October 12th, 2011:
If you look at the raw source of the README.md of Markdown itself(!), relative paths don't seem to be supported.
You will find references like:
[r2h]: http://github.com/github/markup/tree/master/lib/github/commands/rest2html
[r2hc]: http://git...