大约有 11,287 项符合查询结果（耗时：0.0186秒） [XML]
How do you set, clear, and toggle a single bit?
How do you set, clear, and toggle a bit?
30 Answers
30
...
Mysql: Select rows from a table that are not in another
How to select all rows in one table that do not appear on another?
8 Answers
8
...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...
First, note that this behavior applies to any default value that is subsequently mutated (e.g. hashes and strings), not just arrays.
TL;DR: Use Hash.new { |h, k| h[k] = [] } if you want the most idiomatic solution and don’t care why.
What do...
&& (AND) and || (OR) in IF statements
...
No, it will not be evaluated. And this is very useful. For example, if you need to test whether a String is not null or empty, you can write:
if (str != null && !str.isEmpty()) {
doSomethingWith(str.charAt(0));
}
or, the other w...
Obfuscated C Code Contest 2006. Please explain sykes2.c
...
Let's de-obfuscate it.
Indenting:
main(_) {
_^448 && main(-~_);
putchar(--_%64
? 32 | -~7[__TIME__-_/8%8][">'txiZ^(~z?"-48] >> ";;;====~$::199"[_*2&8|_/64]/(_&2?1:8)%8&1
: 10);
}
...
Natural Sort Order in C#
...
The easiest thing to do is just P/Invoke the built-in function in Windows, and use it as the comparison function in your IComparer:
[DllImport("shlwapi.dll", CharSet = CharSet.Unicode)]
private static extern int StrCmpLogicalW(string psz1, string psz2);
Michael Kapla...
How to count duplicate value in an array in javascript
...
function count() {
array_elements = ["a", "b", "c", "d", "e", "a", "b", "c", "f", "g", "h", "h", "h", "e", "a"];
array_elements.sort();
var current = null;
var cnt = 0;
for (var i = 0; i < array_elements.length; i++) {
if (array_ele...
Replacements for switch statement in Python?
I want to write a function in Python that returns different fixed values based on the value of an input index.
44 Answers...
Python dictionary from an object's fields
Do you know if there is a built-in function to build a dictionary from an arbitrary object? I'd like to do something like this:
...
SQL - Select first 10 rows only?
...
In SQL server, use:
select top 10 ...
e.g.
select top 100 * from myTable
select top 100 colA, colB from myTable
In MySQL, use:
select ... order by num desc limit 10
share
|
improve this an...