大约有 44,000 项符合查询结果（耗时：0.0406秒） [XML]
Truncate number to two decimal places without rounding
...2.55
2.99999 => 2.99
4.27 => 4.27
15.7784514 => 15.77
123.5999 => 123.59
0.000000199 => 1.99 *
* As mentioned in the note, that's due to javascript implicit conversion into exponential for "1.99e-7"
And for some other values of n:
15.001097 => 15.0010 (n=4)
0.00...
Best way to parse command line arguments in C#? [closed]
... master), or their arguments are not flexible (i.e., doesn't support --foo 123 = --foo=123 = -f 123= -f=123 and also -v -h = -vh).
– Wernight
Nov 28 '12 at 12:13
1
...
Hidden Features of VB.NET?
...5b" Like "a[L-P]#[!c-e]"
' The following statement returns True (does "BAT123khg" begin with a'
' "B", followed by any single character, followed by a "T", and end'
' with zero or more characters of any type?)'
testCheck = "BAT123khg" Like "B?T*"
' The following statement returns False (does...
Efficient way to remove ALL whitespace from String?
... .ToArray());
}
I tested it in a simple unit test:
[Test]
[TestCase("123 123 1adc \n 222", "1231231adc222")]
public void RemoveWhiteSpace1(string input, string expected)
{
string s = null;
for (int i = 0; i < 1000000; i++)
{
s = input.RemoveWhitespace();
}
Assert...
Does MSTest have an equivalent to NUnit's TestCase?
...a4b5", "345")]
[DataRow("3&amp;amp;5*", "35")]
[DataRow("123", "123")]
public void StripNonNumeric(string before, string expected)
{
string actual = FormatUtils.StripNonNumeric(before);
Assert.AreEqual(expected, actual);
}
}
Again, V...
SQLAlchemy IN clause
...
How about
session.query(MyUserClass).filter(MyUserClass.id.in_((123,456))).all()
edit: Without the ORM, it would be
session.execute(
select(
[MyUserTable.c.id, MyUserTable.c.name],
MyUserTable.c.id.in_((123, 456))
)
).fetchall()
select() takes two parameters...
SQL update fields of one table from fields of another one
...('a.' || quote_ident(column_name), ',') || ')
FROM a
WHERE b.id = 123
AND a.id = b.id'
FROM information_schema.columns
WHERE table_name = 'a' -- table name, case sensitive
AND table_schema = 'public' -- schema name, case sensitive
AND column_name <> 'id' -...
Sprintf equivalent in Java
... that are perfect as instance methods, take String.Length()
int length = "123".Length();
In this situation, it's obvious we are not trying to modify "123", we are just inspecting it, and returning its length. This is a perfect candidate for an instance method.
My simple rules for Instance Method...
What's the difference between Task.Start/Wait and Async/Await?
...Thread.Sleep(1000);
WriteOutput("B - Completed something");
return 123;
}
static void WriteOutput(string message)
{
Console.WriteLine("[{0}] {1}", Thread.CurrentThread.ManagedThreadId, message);
}
DoAsTask Output:
[1] Program Begin
[1] 1 - Starting
[1] 2 - Task started
[3] A - Start...
Difference between final and effectively final
...ited Aug 3 '18 at 16:13
user10111237
answered Jan 5 '14 at 19:32
Suresh AttaSuresh Atta
...