大约有 44,000 项符合查询结果（耗时：0.0489秒） [XML]
TypeScript static classes
...
public static myProp = "Hello";
public static doSomething(): string {
return "World";
}
}
const okay = MyClass.doSomething();
//const errors = new MyClass(); // Error
share
|
...
Learning Regular Expressions [closed]
...ou've ever used grep on Unix—even if only to search for ordinary looking strings—you've already been using regular expressions! (The re in grep refers to regular expressions.)
Order from the menu
Adding just a little complexity, you can match either 'Nick' or 'nick' with the pattern [Nn]ick. T...
How to redirect cin and cout to files?
...rks fine.
#include <iostream>
#include <fstream>
#include <string>
void f()
{
std::string line;
while(std::getline(std::cin, line)) //input from the file in.txt
{
std::cout << line << "\n"; //output to the file out.txt
}
}
int main()
{
s...
PostgreSQL function for last inserted ID
...s some TRIGGER (or RULE) that, on insertion into persons table, makes some extra insertions in other tables... then LASTVAL will probably give us the wrong value. The problem can even happen with CURRVAL, if the extra insertions are done intto the same persons table (this is much less usual, but the...
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery
...) with $('p')[0] when using jQuery, for slightly shorter code.
Pros: any string can be dynamically inserted into the style
Cons: original styles aren't altered, just overridden; repeated (ab)use can make the DOM grow arbitrarily large
3) Alter a different DOM attribute
You can also to use att...
Why is Git better than Subversion?
... ways to copy the repo). With Git, that's the default mode anyway. It's an extra command though (git commit commits locally, whereas git push origin master pushes the master branch to the remote named "origin").
As said above: Git adds complexity. Two modes of creating repositories, checkout vs. cl...
How can I avoid Java code in JSP files, using JSP 2?
..., HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
User user = userService.find(username, password);
if (user != null) {
request.getSession().setAttrib...
What is a reasonable code coverage % for unit tests (and why)? [closed]
...00% test coverage of all the functionality I want to provide (even for the extra cool features I came with myself and which were not discussed during the meetings).
I don't care if I would have code which is not covered in tests, but I would care if I would refactor my code and end up having a diff...
Get size of all tables in database
...with filtered indexes: For each filtered index for a given table, I see an extra row with that tables's name in the results. The "RowCounts" of each of those extra rows corresponds to the number of rows covered by one of the filtered indexes. (on Sql2012)
– Akos Lukacs
...
Which is the first integer that an IEEE 754 float is incapable of representing exactly?
...f... the number it represents is actually 1.abcdef... × 2^e, providing an extra implicit bit of precision.
Therefore, the first integer that cannot be accurately represented and will be rounded is:
For float, 16,777,217 (224 + 1).
For double, 9,007,199,254,740,993 (253 + 1).
>>> 9007199...