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Ways to save enums in database
...ack |
This way, when you want to change your cards to use Kissing Kings New Deck Order you can change it for display purposes without throwing away all your data:
| Suit | SuitID | Rank | Color | CardOrder |
|------------|--------------|---------------|--------|-----------|...
HTTP response code for POST when resource already exists
... saying 400 is correct usage in this case but it could be correct with the new definition of 400.
– javajavajavajavajava
Jun 21 '16 at 18:16
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MongoDB and “joins” [duplicate]
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As of Mongo 3.2 the answer to this question is no longer correct. The new $lookup operator added to the aggregation pipeline is essentially identical to a left outer join:
https://docs.mongodb.org/master/reference/operator/aggregation/lookup/#pipe._S_lookup
From the docs:
{
$lookup:
...
How set the android:gravity to TextView from Java side in Android
...xtView ta = (TextView) findViewById(R.layout.text_view);
LayoutParams lp = new LayoutParams();
lp.gravity = Gravity.CENTER_HORIZONTAL;
ta.setLayoutParams(lp);
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How do I sort an NSMutableArray with custom objects in it?
...sortedArray = [drinkDetails sortedArrayUsingComparator:^NSComparisonResult(id a, id b) {
NSDate *first = [(Person*)a birthDate];
NSDate *second = [(Person*)b birthDate];
return [first compare:second];
}];
Performance
The -compare: and block-based methods will be quite a bit faster, in...
Postgres unique constraint vs index
...read this in the doc:
ADD table_constraint [ NOT VALID ]
This form adds a new constraint to a table using the same syntax as CREATE TABLE, plus the option NOT VALID, which is currently only allowed for foreign key constraints. If the constraint is marked NOT VALID, the potentially-lengthy initial c...
How to copy a collection from one database to another in MongoDB
...b.<collection_name>.find().forEach(function(d){ db.getSiblingDB('<new_database>')['<collection_name>'].insert(d); });
Please note that with this, the two databases would need to share the same mongod for this to work.
Besides this, you can do a mongodump of a collection from on...
git: fatal: Could not read from remote repository
... @user61629: I know I'm late to the party, but you should consider using private/public key pairs instead of passwords.
– code_dredd
Apr 22 '16 at 22:06
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How to get first element in a list of tuples?
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do you mean something like this?
new_list = [ seq[0] for seq in yourlist ]
What you actually have is a list of tuple objects, not a list of sets (as your original question implied). If it is actually a list of sets, then there is no first element because ...
What is the difference between min SDK version/target SDK version vs. compile SDK version?
...t is 21. My App crashes when I run it on devices with lower API level. I'm new to Android, how should I proceed now?
– prgmrDev
Jul 23 '15 at 11:15
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