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Hash Map in Python
... self.store = [None for _ in range(16)]
def get(self, key):
index = hash(key) & 15
if self.store[index] is None:
return None
n = self.store[index]
while True:
if n.key == key:
return n.value
else:
...
How to escape special characters in building a JSON string?
...ilt into whatever language you're using, like JavaScript's JSON.stringify, PHP's json_encode, or Python's json.dumps. If you're using a language that doesn't have such functionality built in, you can probably find a JSON parsing and encoding library to use. If you simply use language or library func...
When should I use the HashSet type?
...id Clear();
bool Contains(T item);
void CopyTo(T[] array, int arrayIndex);
bool Remove(T item);
// Properties
int Count { get; }
bool IsReadOnly { get; }
}
A List<T> implements IList<T>, which extends the ICollection<T>
public interface IList<T> : IC...
Pandas get topmost n records within each group
...
EDIT: As mentioned by the questioner, use df.groupby('id').head(2).reset_index(drop=True) to remove the multindex and flatten the results.
>>> df.groupby('id').head(2).reset_index(drop=True)
id value
0 1 1
1 1 2
2 2 1
3 2 2
4 3 1
5 4 1
...
How do you take a git diff file, and apply it to a local branch that is a copy of the same repositor
...nks for the reply, but that caused an error saying, patch failed: filename.php:202 error:filename.php: patch does not apply. The good news is that its not the first filename in the file, so it at least would have been able to process some of the file. Any thoughts?
– Mike_K
...
Custom Cell Row Height setting in storyboard is not responding
... this method:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
In the function of a row you can choose Height. For example,
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0) ...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...
A PHP version for those who need it: gist.github.com/chaoszcat/5325115#file-gistfile1-php
– Lionel Chan
Apr 6 '13 at 6:28
...
Storing sex (gender) in database
... a need to port.
Conclusion
I would use Option 2: CHAR(1).
Addendum
An index on the gender column likely would not help because there's no value in an index on a low cardinality column. Meaning, there's not enough variety in the values for the index to provide any value.
...
Git-Based Source Control in the Enterprise: Suggested Tools and Practices?
...er focus on your context. It is the common conception, that using a DVCS requires a more disciplined team than using a centralized system. This is because a centralized system provides you with an easy way to enforce your workflow, using a decentralized system requires more communication and discipl...
How to avoid passing parameters everywhere in play2?
...
Then in your actions you’ll be able to just write the following:
def index = Action {
Ok(views.html.index())
}
def index2 = Action {
Ok(views.html.index2())
}
You can find more information about this approach in this blog post and in this code sample.
Update: A nice blog post demonstra...