大约有 31,100 项符合查询结果（耗时：0.0636秒） [XML]
Forward declaration of nested types/classes in C++
...
Thanks for the answer. In my case, they're not my nested classes. I was hoping to avoid a huge library header file dependency with a little forward reference. I wonder if C++11 fixed it?
– Marsh Ray
Nov 7 '11 at ...
How to change a nullable column to not nullable in a Rails migration?
... then you could probably do it like this:
# Make sure no null value exist
MyModel.where(date_column: nil).update_all(date_column: Time.now)
# Change the column to not allow null
change_column :my_models, :date_column, :datetime, null: false
...
Reading my own Jar's Manifest
I need to read the Manifest file, which delivered my class, but when I use:
12 Answers
...
[SOLVED] Can't send payload > 23bytes(MTU setted to 128bytes) - #9 by ...
... newbie here and trying to send big strings, like 128bytes from the app to my hardware(ESP32).
From the app side I have a text box that is sending the string to ESP32, all working except when I try to send strings over 23bytes. Ok, I read some topics here and tried to apply those solutions but no su...
Reimport a module in python while interactive
...
This should work:
reload(my.module)
From the Python docs
Reload a previously imported module. The argument must be a module object, so it must have been successfully imported before. This is useful if you have edited the module source file usin...
Android studio Gradle build speed up
...
After change this settings my compile time 10 mins reduced to 10 secs.
Step 1:
Settings(ctrl+Alt+S) ->
Build,Execution,Deployment ->
Compiler ->
type "--offline" in command-line Options box.
Step 2:
check the “C...
How do I pause my shell script for a second before continuing?
...ly found how to wait for user input. However, I only want to pause so that my while true doesn't crash my computer.
10 A...
See my work log in jira
...
In Jira 7, I get there by going to my project, then Reports on the left, then it's the very last item on the page in my setup.
– Sbodd
Feb 21 '18 at 0:29
...
How do I activate a virtualenv inside PyCharm's terminal?
I've set up PyCharm, created my virtualenv (either through the virtual env command, or directly in PyCharm) and activated that environment as my Interpreter. Everything is working just fine.
...
How do I get a background location update every n minutes in my iOS application?
...m looking for a way to get a background location update every n minutes in my iOS application. I'm using iOS 4.3 and the solution should work for non-jailbroken iPhones.
...