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Detect if value is number in MySQL
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The accepted answer is really clever, but this answer is more direct, and I think it should be the accepted solution.
– pedromanoel
Oct 30 '13 at 15:50
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SQL UPDATE all values in a field with appended string CONCAT not working
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That's pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t se...
Get an object properties list in Objective-C
...turn nil;
}
NSMutableDictionary *results = [[[NSMutableDictionary alloc] init] autorelease];
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList(klass, &outCount);
for (i = 0; i < outCount; i++) {
objc_property_t property = properties[i...
Create a submodule repository from a folder and keep its git commit history
...ommit it
git filter-branch --subdirectory-filter <directory 1> -- --all
You should now have a git repository with the files from directory 1 in your repo's root with all related commit history.
Step 4
Create your online repository and push your new repository!
git remote add origin <...
Getting all names in an enum as a String[]
...<?>> e) {
return Arrays.toString(e.getEnumConstants()).replaceAll("^.|.$", "").split(", ");
}
That you would call like this:
String[] names = getNames(State.class); // any other enum class will work
If you just want something simple for a hard-coded enum class:
public static Strin...
How to copy in bash all directory and files recursive?
... So, to clarify, capital -R option will copy the root dir again; small -r option keeps the root paths the same.
– AnneTheAgile
Aug 7 '14 at 13:27
8
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How would one call std::forward on all arguments in a variadic function?
...mpiler I would do this with real variadic templates. How though, would I call std::forward on the arguments?
1 Answer
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Detecting WPF Validation Errors
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This post was extremely helpful. Thanks to all who contributed. Here is a LINQ version that you will either love or hate.
private void CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = IsValid(sender as DependencyObject);
}
private bool IsV...
How to convert a Git shallow clone to a full clone?
Follow-up of this so-question: if I have a shallow clone, how to fetch all older commits to make it a full clone?
6 Answe...
Java: Best way to iterate through a Collection (here ArrayList)
...one is useful when you need the index of the element as well. This is basically equivalent to the other two variants for ArrayLists, but will be really slow if you use a LinkedList.
The second one is useful when you don't need the index of the element but might need to remove the elements as you it...