大约有 40,000 项符合查询结果（耗时：0.0590秒） [XML]
Using LINQ to concatenate strings
...question and is not intended for everyday use. Because this does not use a StringBuilder it will have horrible performance for very long sequences. For regular code use String.Join as shown in the other answer
Use aggregate queries like this:
string[] words = { "one", "two", "three" };
var res = w...
Why is there no SortedList in Java?
...Set interfaces and works as you'd probably expect from a list:
TreeSet<String> set = new TreeSet<String>();
set.add("lol");
set.add("cat");
// automatically sorts natural order when adding
for (String s : set) {
System.out.println(s);
}
// Prints out "cat" and "lol"
If you don't ...
Plot two histograms on single chart with matplotlib
...dom
import numpy
from matplotlib import pyplot
x = [random.gauss(3,1) for _ in range(400)]
y = [random.gauss(4,2) for _ in range(400)]
bins = numpy.linspace(-10, 10, 100)
pyplot.hist(x, bins, alpha=0.5, label='x')
pyplot.hist(y, bins, alpha=0.5, label='y')
pyplot.legend(loc='upper right')
pyplot....
What is an abstract class in PHP?
...re interface. Also interfaces are a special case of abstract classes where ALL methods are abstract.
See this section of the PHP manual for further reference.
share
|
improve this answer
|...
Open an IO stream from a local file or url
I know there are libs in other languages that can take a string that contains either a path to a local file or a url and open it as a readable IO stream.
...
Replace spaces with dashes and make all letters lower-case
I need to reformat a string using jQuery or vanilla JavaScript
5 Answers
5
...
Shell equality operators (=, ==, -eq)
...
It's the other way around: = and == are for string comparisons, -eq is for numeric ones. -eq is in the same family as -lt, -le, -gt, -ge, and -ne, if that helps you remember which is which.
== is a bash-ism, by the way. It's better to use the POSIX =. In bash the two ...
How do you concatenate Lists in C#?
... Form1()
{
InitializeComponent();
List<string> FirstList = new List<string>();
FirstList.Add("1234");
FirstList.Add("4567");
// In my code, I know I would not have this here but I put it in as a demonstration that it w...
How to reset sequence in postgres and fill id column with new data?
... This might cause duplicate ids. To prevent this, you can first set all to very high values: UPDATE t SET idcolumn=1000000+ nextval('seq'); then run the above script.
– tahagh
Nov 28 '13 at 13:15
...
Regex for splitting a string using space when not surrounded by single or double quotes
...elp. I'm trying to put together an expression that will split the example string using all spaces that are not surrounded by single or double quotes. My last attempt looks like this: (?!") and isn't quite working. It's splitting on the space before the quote.
...