大约有 15,000 项符合查询结果（耗时：0.0281秒） [XML]
Unicode equivalents for \w and \b in Java regular expressions?
...The short story is that my code rewrites those 14 as follows:
\s => [\u0009-\u000D\u0020\u0085\u00A0\u1680\u180E\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]
\S => [^\u0009-\u000D\u0020\u0085\u00A0\u1680\u180E\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]
\v => [\u000A-\u000D\u0085\u2028\u20...
C# operator overload for `+=`?
...
Console.WriteLine(d);
Let view the IL-code for this instructions:
IL_0000: nop
IL_0001: ldc.i4.s 10
IL_0003: newobj instance void [mscorlib]System.Decimal::.ctor(int32)
IL_0008: stloc.0
IL_0009: ldloc.0
IL_000a: ldc.i4.s 10
IL_000c: newobj instance void [mscorlib...
What is a plain English explanation of “Big O” notation?
...anges the comparison; and
complexity: if it takes me one second to sort 10,000 elements, how long will it take me to sort one million? Complexity in this instance is a relative measure to something else.
Come back and reread the above when you've read the rest.
The best example of Big-O I can thi...
Select random lines from a file
...
I ran this on a 500M row file to extract 1,000 rows and it took 13 min. The file had not been accessed in months, and is on an Amazon EC2 SSD Drive.
– T. Brian Jones
Mar 4 '16 at 18:26
...
Casting vs using the 'as' keyword in the CLR
...System.Diagnostics;
using System.Linq;
class Test
{
const int Size = 30000000;
static void Main()
{
object[] values = new object[Size];
for (int i = 0; i < Size - 2; i += 3)
{
values[i] = null;
values[i + 1] = "x";
values[i...
Python unittests in Jenkins?
...gt;
<testcase classname="tests.SimpleTest" name="test_fail" time="0.000301837921143">
<failure message="test failure">self = &lt;tests.SimpleTest testMethod=test_fail&gt;
def test_fail(self):
&gt; self.assertEqual(11, 7 + 3)
E AssertionError: 11 !...
What does mysql error 1025 (HY000): Error on rename of './foo' (errorno: 150) mean?
...fferent character set of a table, because of a mysql error: ERROR 1025 (HY000): Error on rename of './table/#sql-14ae_81' to (errno: 150)
– letsjump
Feb 3 '17 at 8:52
...
How to list variables declared in script in bash?
...puriously make it into the output.
+ function a() { echo $'\nA2=B'; }; A0=000; A9=999;
+ SOLUTION | grep '^A[0-9]='
A0=000
A9=999
AND: The "DejayClayton" problem is solved (embedded newlines in variable values do not disrupt the output - each VAR=VALUE get a single output line):
+ A1=$'111\nA2=...
Converting Long to Date in Java returns 1970
I have list with long values (for example: 1220227200, 1220832000, 1221436800...) which I downloaded from web service. I must convert it to Dates. Unfortunately this way, for example:
...
How can I output leading zeros in Ruby?
... see the documentation on this now (ruby-doc.org/core/classes/String.html#M000770), but it's very concise and I'd like a little elaboration.
– Nathan Long
Oct 9 '09 at 11:29
1
...