大约有 46,000 项符合查询结果（耗时：0.0510秒） [XML]
Check for column name in a SqlDataReader object
...is a working sample for Jasmin's idea:
var cols = r.GetSchemaTable().Rows.Cast<DataRow>().Select
(row => row["ColumnName"] as string).ToList();
if (cols.Contains("the column name"))
{
}
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How do I use DateTime.TryParse with a Nullable?
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Why are you casting a DateTime to a DateTime? You don't need to recased d2 before passing it into the TryParse.
– Aaron Powell
Oct 31 '08 at 21:48
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Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?
...o be careful with booleans in Objective-C.
To sum up, only exact @YES and casted value as @((BOOL)expression) are of __NSCFBoolean type and converted to true with JSON serialization.
Any other expressions like @(expression1 && expression2) (even @(YES && YES)) are of __NSCFNumber (i...
How to convert an array into an object using stdClass() [duplicate]
...this solution json_decode(json_encode($clasa)) over just using (object) to cast the array into an object is that the latter doesn't do it recursively so any inner arrays remain arrays.
– racl101
Jan 21 '15 at 18:20
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How to print a date in a regular format?
...isplay them, just use str(). In Python, the good practice is to explicitly cast everything. So just when it's time to print, get a string representation of your date using str(date).
One last thing. When you tried to print the dates, you printed mylist. If you want to print a date, you must print th...
AWS MySQL RDS vs AWS DynamoDB [closed]
...ation and dynamo. Further, point number 6 is misnamed to the point that it casts a doubt on DynamoDB's "integrity" - that might not be the intention...
– doles
Feb 10 '17 at 15:41
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How to convert comma-delimited string to list in Python?
...the case of integers that are included at the string, if you want to avoid casting them to int individually you can do:
mList = [int(e) if e.isdigit() else e for e in mStr.split(',')]
It is called list comprehension, and it is based on set builder notation.
ex:
>>> mStr = "1,A,B,3,4"
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How to handle button clicks using the XML onClick within Fragments
...ckable someFragment;
//...onCreate, etc. instantiating your fragments casting to your interface.
public void myClickMethod(View v) {
someFragment.myClickMethod(v);
}
Fragment:
public class SomeFragment implements XmlClickable {
//...onCreateView, etc.
@Override
public void myClickMet...
Fastest way to convert Image to Byte array
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Unable to cast object of type 'System.Byte[]' to type 'System.Drawing.Image'.
– user123
Jun 18 '14 at 12:26
ad...
Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
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int inBetween2{ 0 };
for (int i = 1; i < MaxNum; ++i)
{
if (static_cast<unsigned>(num - randVec[i - 1]) <= (randVec[i] - randVec[i - 1]))
++inBetween2;
}
Pay attention that randVec is a sorted vector. For any size of MaxNum the first method beats the second one on my machi...