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Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
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Have just hit this problem. You can also use db.start_transaction() and db.commit_transaction() in the schema migration to separate data changes from schema changes. Probably not so clean as to have a separate data migration but in my case I would need schema, data, and th...
Where in memory are my variables stored in C?
...es 4 bytes (if 64 bit machine 8 bytes) which will be in stack to store the starting pointer of the n bytes of memory chunk.
Note : Pointer variables can point the memory of any segment.
int x = 10;
void func()
{
int a = 0;
int *p = &a: //Now its pointing the memory of stack
int *p2 = &x; ...
How to read and write INI file with Python3?
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This can be something to start with:
import configparser
config = configparser.ConfigParser()
config.read('FILE.INI')
print(config['DEFAULT']['path']) # -> "/path/name/"
config['DEFAULT']['path'] = '/var/shared/' # update
config['DEFAULT'...
Private properties in JavaScript ES6 classes
...e fields (and methods) are being implemented in the ECMA standard. You can start using them today with babel 7 and stage 3 preset.
class Something {
#property;
constructor(){
this.#property = "test";
}
#privateMethod() {
return 'hello world';
}
getPrivateMessage() {
ret...
Custom CSS Scrollbar for Firefox
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drafts.csswg.org/css-scrollbars-1 is the stage 1 start of the spec, but it's enabled in Firefox Nightly now out of the box by default.
– wegry
Nov 2 '18 at 15:09
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How do you use the Immediate Window in Visual Studio?
...ust type a > followed by the command.
For example >shell cmd will start a command shell (this can be useful to check what environment variables were passed to Visual Studio, for example). >cls will clear the screen.
Here is a list of commands that are so commonly used that they have the...
What does “Content-type: application/json; charset=utf-8” really mean?
... The assumption still holds though, as any valid json will still start with two ascii characters.
– Larsing
Dec 5 '17 at 13:29
1
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Java regex capturing groups indexes
...ttern is defined to be group number 0.
Any capturing group in the pattern start indexing from 1. The indices are defined by the order of the opening parentheses of the capturing groups. As an example, here are all 5 capturing groups in the below pattern:
(group)(?:non-capturing-group)(g(?:ro|u)p( ...
ASP.NET MVC Html.DropDownList SelectedValue
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The code in the previous MVC 3 post does not work but it is a good start. I will fix it. I have tested this code and it works in MVC 3 Razor C# This code uses the ViewModel pattern to populate a property that returns a List<SelectListItem>.
The Model class
public class Product
{
...
Where is the WPF Numeric UpDown control?
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It should be noted that starting with version v3.7.0, the open sourced version of wpftoolkit is provided under a proprietary non-commercial license rather than MS-PL (reference)
– Jordoff
Dec 19 '19 at 0:30
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