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How can I filter a date of a DateTimeField in Django?
I am trying to filter a DateTimeField comparing with a date. I mean:
14 Answers
14
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sqlalchemy flush() and get inserted id?
...ve the following error: InvalidRequestError: Could not refresh instance '<....>'. It appears after the flush that the instance simply no longer exists. Appreciate any insight.
– PlaidFan
Dec 21 '11 at 4:46
...
What is the difference between an ordered and a sorted collection?
...derived from the elements themselves. For example, if you have a SortedSet<String> then the Strings will be sorted according to the lexicographical sort order.
An ordered Collection can be sorted but doesn't have to be (e.g. after using Collections.sort()) when the external ordering is identi...
Passing an array by reference
...g to me that the operator precedence rules insist this must happen by default anyway.
– underscore_d
Aug 30 '16 at 15:27
...
SQL error “ORA-01722: invalid number”
...tween '1001000' and '1001999';
...and voilà: It returns the expected result.
edit:
And indeed: the col acc_num in my table is defined as String. Although not numerical, the invalid number was reported. And the explicit delimiting of the string-numbers resolved the problem.
On the other hand, Oracl...
Read .mat files in Python
...help/matlab/import_export/mat-file-versions.html (header: 'Save to Nondefault MAT-File Version')
– watsonic
Apr 22 '15 at 22:24
5
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What is the use of “ref” for reference-type variables in C#?
...t to modify the actual reference and not the object pointed to:
void Swap<T>(ref T x, ref T y) {
T t = x;
x = y;
y = t;
}
var test = new[] { "0", "1" };
Swap(ref test[0], ref test[1]);
share
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Android: set view style programmatically
... inflating your view from XML you'd need to specify an id in the layout:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/my_styleable_relative_layout"
style="@style/LightStyle"
...
Then when you need to change the style programmatica...
Authorize Attribute with Multiple Roles
I would like to add Authorization to a controller, for multiple Roles at once.
5 Answers
...
Print “hello world” every X seconds
... the main thread to sleep 3000 milliseconds (3 seconds):
for(int i = 0; i< 10; i++) {
try {
//sending the actual Thread of execution to sleep X milliseconds
Thread.sleep(3000);
} catch(InterruptedException ie) {}
System.out.println("Hello world!"):
}
This will stop ...