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Rails :dependent => :destroy VS :dependent => :delete_all
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The difference is with the callback.
The :delete_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. ...
How to validate date with format “mm/dd/yyyy” in JavaScript?
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function isValidDate(dateString)
{
// First check for the pattern
if(!/^\d{1,2}\/\d{1,2}\/\d{4}$/.test(dateString))
return false;
// Parse the date parts to integers
var parts = dateString.split("/");
var day = parseInt(parts[1], 10);
var month = parseInt(parts[0], ...
Reverting to a specific commit based on commit id with Git? [duplicate]
...r repo to that state? Or you just want your local repo to look like that?
if you do
git reset --hard c14809fa
It will make your local code and local history be just like it was at that commit. But then if you wanted to push this to someone else who has the new history, it would fail.
if you do...
Difference between margin and padding?
What exactly is the difference between margin and padding in CSS? It really doesn't seem to serve much purpose. Could you give me an example of where the differences lie (and why it is important to know the difference)?
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How do you implement a re-try-catch?
...uccess
} catch (SomeException e) {
// handle exception
if (++count == maxTries) throw e;
}
}
I have taken count and maxTries to avoid running into an infinite loop, in case the exception keeps on occurring in your try block.
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Git branching strategy integated with testing/QA process
...op branch on feature we normally don't expect too many conflicts. However, if that's the case the developer can help. This is a tricky step, I think the best way to avoid it is to keep features as small/specific as possible. Different features have to be eventually merged, one way or another. Of cou...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...nly uses as much memory as it needs to).
I noticed that the graph you specified above has only one edge that is directional (B,E). Was this a typo or is it really a directed graph? This solution works regardless. Sorry I was unable to do it in C, I'm a bit weak in that area. I expect that you will ...
Looping through array and removing items, without breaking for loop
... to remove an item, I then get that 'seconds' is undefined. I could check if it's undefined, but I feel there's probably a more elegant way to do this. The desire is to simply delete an item and keep on going.
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Javascript Equivalent to C# LINQ Select
...orted in older browsers, I suggest that you stick with the jQuery method.
If you prefer the other one for some reason you could always add a polyfill for old browser support.
You can always add custom methods to the array prototype as well:
Array.prototype.select = function(expr){
var arr = t...
How to make a JTable non-editable
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While the approach you specify works, there is no such method as isEditable in the AbstractTableModel. What exists is the method isCellEditable(int,int) which takes rowIndex and coulmnIndex as parameters. The user can selectively enable/disable editing...