大约有 40,000 项符合查询结果（耗时：0.0486秒） [XML]
Django: Get list of model fields?
I've defined a User class which (ultimately) inherits from models.Model . I want to get a list of all the fields defined for this model. For example, phone_number = CharField(max_length=20) . Basically, I want to retrieve anything that inherits from the Field class.
...
Ruby: How to iterate over a range, but in set increments?
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
How can you profile a Python script?
...ere is 3 steps to help. 1. Install via pip, 2. Install GraphViz via exe 3. Set up path variables to GraphViz directory 4. Figure out how to fix all the other errors. 5. Figure out where it saves the png file?
– marsh
Mar 24 '16 at 17:07
...
How to create a MySQL hierarchical recursive query
....id
)
select * from cte;
The value specified in parent_id = 19 should be set to the id of the parent you want to select all the descendants of.
MySQL 5.x
For MySQL versions that do not support Common Table Expressions (up to version 5.7), you would achieve this with the following query:
select ...
How to get an enum which is created in attrs.xml in code
...he enum entries for my custom attribute. Now I want to create an method to set this value programmatically, but I can not access the enum.
...
How do I remove code duplication between similar const and non-const member functions?
Let's say I have the following class X where I want to return access to an internal member:
19 Answers
...
Run Cron job every N minutes plus offset
...se a step value in the minute field that divides evenly into 60.
So to offset the start time, specify the range explicitly and set the first value to the amount of the offset.
Examples
5-59/20 * * * * will run at 5 minutes after, 25 minutes after, and 45 minutes after.
10-59/25 * * * * will run ...
Git for beginners: The definitive practical guide
...sitory: this has one gotcha: if you have the environment variable $GIT_DIR set in your current shell, git will ignore your current location and use the repository at $GIT_DIR. I should know, I lost an hour to that yesterday.
– sanmiguel
Mar 1 '12 at 12:17
...
Going to a specific line number using Less in Unix
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
How to append to New Line in Node.js
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...