大约有 47,000 项符合查询结果（耗时：0.0407秒） [XML]
How to round a number to n decimal places in Java
...ngMode(RoundingMode.CEILING);
for (Number n : Arrays.asList(12, 123.12345, 0.23, 0.1, 2341234.212431324)) {
Double d = n.doubleValue();
System.out.println(df.format(d));
}
gives the output:
12
123.1235
0.23
0.1
2341234.2125
EDIT: The original answer does not address the accuracy of th...
Using numpy to build an array of all combinations of two arrays
...
10 Answers
10
Active
...
How do I ZIP a file in C#, using no 3rd-party APIs?
...|
edited Mar 24 '11 at 13:03
adrianbanks
74.8k1919 gold badges162162 silver badges195195 bronze badges
a...
Putting an if-elif-else statement on one line?
...st likely violate PEP-8 where it is mandated that lines should not exceed 80 characters in length.
It's also against the Zen of Python: "Readability counts". (Type import this at the Python prompt to read the whole thing).
You can use a ternary expression in Python, but only for expressions, not f...
Performance of FOR vs FOREACH in PHP
First of all, I understand in 90% of applications the performance difference is completely irrelevant, but I just need to know which is the faster construct. That and...
...
How to convert a std::string to const char* or char*?
...
1091
If you just want to pass a std::string to a function that needs const char* you can use
std:...
Create list of single item repeated N times
...
809
You can also write:
[e] * n
You should note that if e is for example an empty list you get a...
How can I get the client's IP address in ASP.NET MVC?
...e
{
szIP = szXForwardedFor;
if (szIP.IndexOf(",") > 0)
{
string [] arIPs = szIP.Split(',');
foreach (string item in arIPs)
{
if (!isPrivateIP(item))
{
return item;
...
Get last n lines of a file, similar to tail
... till it's found the right number of '\n' characters.
def tail( f, lines=20 ):
total_lines_wanted = lines
BLOCK_SIZE = 1024
f.seek(0, 2)
block_end_byte = f.tell()
lines_to_go = total_lines_wanted
block_number = -1
blocks = [] # blocks of size BLOCK_SIZE, in reverse orde...