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Error renaming a column in MySQL
...n. For example:
ALTER TABLE `xyz` CHANGE `manufacurerid` `manufacturerid` INT;
Remember :
Replace INT with whatever your column data type is (REQUIRED)
Tilde/ Backtick (`) is optional
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Wait one second in running program
İ want to wait one second before printing my grid cells with this code, but it isn't working. What can i do?
10 Answers
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Can constructors be async?
...t an object that will be actually properly initialized at some undefined point in the future. That is, if you're lucky and the async initialization doesn't fail.
All this is just a guess. But it seems to me that having the possibility of an async constructor brings more trouble than it's worth.
If...
Version number comparison in Python
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Remove the uninteresting part of the string (trailing zeroes and dots), and then compare the lists of numbers.
import re
def mycmp(version1, version2):
def normalize(v):
return [int(x) for x in re.sub(r'(\.0+)*$','', v).spli...
How do you create an asynchronous method in C#?
...the async keyword:
private static async Task<DateTime> CountToAsync(int num = 10)
{
for (int i = 0; i < num; i++)
{
await Task.Delay(TimeSpan.FromSeconds(1));
}
return DateTime.Now;
}
If your async method is doing CPU work, you should use Task.Run:
private static async Task...
Get Month name from month number
...ed Month Names : "Aug"
DateTimeFormatInfo.GetAbbreviatedMonthName Method (Int32)
Returns the culture-specific abbreviated name of the specified month
based on the culture associated with the current DateTimeFormatInfo
object.
string monthName = CultureInfo.CurrentCulture.DateTimeFormat.Ge...
Why Doesn't C# Allow Static Methods to Implement an Interface?
...
Assuming you are asking why you can't do this:
public interface IFoo {
void Bar();
}
public class Foo: IFoo {
public static void Bar() {}
}
This doesn't make sense to me, semantically. Methods specified on an interface should be there to specify the contract for inte...
Undocumented NSURLErrorDomain error codes (-1001, -1003 and -1004) using StoreKit
...7,
kCFURLErrorResourceUnavailable = -1008,
kCFURLErrorNotConnectedToInternet = -1009,
kCFURLErrorRedirectToNonExistentLocation = -1010,
kCFURLErrorBadServerResponse = -1011,
kCFURLErrorUserCancelledAuthentication = -1012,
kCFURLErrorUserAuthenticationRequired = -1013,...
What's the difference between “mod” and “remainder”?
...r, but it might also be the modulus (i.e. always positive), because in C89 integer division was permitted to round towards negative infinity instead of towards 0. So in C89, -5 / 2 could be -2 with remainder -1, or -3 with remainder 1, the implementation just had to document which. C99 removed the f...
Retrieving the last record in each group - MySQL
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Here's the DDL for my Posts table:
CREATE TABLE `posts` (
`PostId` bigint(20) unsigned NOT NULL auto_increment,
`PostTypeId` bigint(20) unsigned NOT NULL,
`AcceptedAnswerId` bigint(20) unsigned default NULL,
`ParentId` bigint(20) unsigned default NULL,
`CreationDate` datetime NOT NULL,
...