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Convert List to List
...
But what if you want to choose for a runtime crash instead of a compile error? You would normally use Cast<> or ConvertAll<> but then you will have 2 problems: It will create a copy of the list. If you add or remove something in the new list, this won't be reflected in the original li...
Uploading base64 encoded Image to Amazon S3 via Node.js
...r, data){
if (err) {
console.log(err);
console.log('Error uploading data: ', data);
} else {
console.log('succesfully uploaded the image!');
}
});
s3_config.json file is:-
{
"accessKeyId":"xxxxxxxxxxxxxxxx",
"secretAccessKey":"xxxxxxxxxxxxxx",
"...
ASP.NET MVC: Custom Validation by DataAnnotation
...is.MinLength)
{
return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName));
}
return null;
}
}
and then you might have a view model and decorate one of its properties with it:
public class MyViewModel
{
[CombinedMinLength(20, "B...
How do I check if file exists in jQuery or pure JavaScript?
...ajax({
url:'http://www.example.com/somefile.ext',
type:'HEAD',
error: function()
{
//file not exists
},
success: function()
{
//file exists
}
});
EDIT:
Here is the code for checking 404 status, without using jQuery
function UrlExists(url)
{
var...
Tips for debugging .htaccess rewrite rules
...nstead see and report that all of the images, css and js are returning 404 errors, quickly narrowing down the problem.
While others will report that you started at URL A and ended at URL C, you will be able to see that they started at URL A, were 302 redirected to URL B and 301 redirected to URL C....
The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
Why do I get Error "The type 'string' must be a non-nullable value type in order to use it as parameter 'T' in the generic type or method 'System.Nullable'"?
...
How to terminate a Python script
...ally
underdeveloped; Unix programs generally use 2 for command line syntax
errors and 1 for all other kind of errors. If another type of object
is passed, None is equivalent to passing zero, and any other object is
printed to stderr and results in an exit code of 1. In particular,
sys.exit("some err...
TypeError: 'module' object is not callable
Why am I getting this error?
I'm confused.
11 Answers
11
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If table exists drop table then create it, if it does not exist just create it
...tement.
That statement drops the table if it exists but will not throw an error if it does not.
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Determine path of the executing script
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Got the same error, with a saved scriptt and freshly installed and run R 3.2.0 on windows...
– RalfB
May 20 '15 at 9:57
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