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Java: Subpackage visibility?
...rotected byte[] getDataAsBytes(){ return data.getBytes(); }
protected char[] getDataAsChars(){ return data.toCharArray(); }
}
make a class in that package that overrides the methods you need in ClassInA:
package a.b;
import a.ClassInA;
public class ClassInAInB extends ClassInA{
ClassIn...
Condition within JOIN or WHERE
...of filtering criteria more easily maintainable.
For example, instead of:
SELECT *
FROM Customers c
INNER JOIN CustomerAccounts ca
ON ca.CustomerID = c.CustomerID
AND c.State = 'NY'
INNER JOIN Accounts a
ON ca.AccountID = a.AccountID
AND a.Status = 1
Write:
SELECT *
FROM Customer...
Encrypt Password in Configuration Files? [closed]
...nt keyLength = 128;
SecretKeySpec key = createSecretKey(password.toCharArray(),
salt, iterationCount, keyLength);
String originalPassword = "secret";
System.out.println("Original password: " + originalPassword);
String encryptedPassword = encrypt(orig...
Converting file size in bytes to human-readable string
...rsion. Can you tell me, though, why you inserted the two invisible Unicode characters U+200C (ZERO WIDTH NON-JOINER) and U+200B (ZERO WIDTH SPACE) after the E oft EiB? Is this intended to be a watermark, so that you can track who used this code? If so, I think you should have made that transparent i...
django models selecting single field
...
thanks for the answer, what if I want to select only 1 or more fields (not all)?
– zentenk
Sep 21 '11 at 16:42
...
Auto-expanding layout with Qt-Designer
...your widget/dialog/window (not the QVBoxLayout, but the parent widget) and select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. The QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized.
...
c# datatable to csv
...s = dt.Columns.Cast<DataColumn>().
Select(column => column.ColumnName).
ToArray();
sb.AppendLine(string.Join(",", columnNames));
foreach (DataRow row in dt.Rows)
{
string[] fields = row.ItemArray.Select(field => fie...
SQL Server - Return value after INSERT
...
No need for a separate SELECT...
INSERT INTO table (name)
OUTPUT Inserted.ID
VALUES('bob');
This works for non-IDENTITY columns (such as GUIDs) too
share
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...
Select Pandas rows based on list index
...
For large datasets, it is memory efficient to read only selected rows via the skiprows parameter.
Example
pred = lambda x: x not in [1, 3]
pd.read_csv("data.csv", skiprows=pred, index_col=0, names=...)
This will now return a DataFrame from a file that skips all rows except 1 and ...
Is it possible to GROUP BY multiple columns using MySQL?
Is it possible to GROUP BY more than one column in a MySQL SELECT query? For example:
7 Answers
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