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乐高机器人®组件 · App Inventor 2 中文网
...n on EV3.
GetHardwareVersion()
Get the hardware version of EV3.
GetOSBuild()
Get the OS build on EV3.
GetOSVersion()
Get the OS version on EV3.
KeepAlive(minutes)
Keep the EV3 brick from shutdown for a period of time.
EV3陀螺仪传感器
A component that provides a high-le...
Creating a left-arrow button (like UINavigationBar's “back” style) on a UIToolbar
... title of previous screen)
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"back_arrow.png"]
style:UIBarButtonItemStyleBordered
targe...
Configuring diff tool with .gitconfig
...mdiff, gvimdiff, ecmerge, diffuse, opendiff, p4merge and araxis), and also allows you to specify your own. To use one of the pre-configured difftools (for example, "vimdiff"), you add the following lines to your ~/.gitconfig:
[diff]
tool = vimdiff
Now, you will be able to run "git difftool" a...
How to get the second column from command output?
...rk to get a specific column out of the command output "docker images":
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu 16.04 12543ced0f6f 10 months ago 122 MB
ubuntu ...
How to shrink/purge ibdata1 file in MySQL
...ng is a particularly annoying feature of MySQL. The ibdata1 file can't actually be shrunk unless you delete all databases, remove the files and reload a dump.
But you can configure MySQL so that each table, including its indexes, is stored as a separate file. In that way ibdata1 will not grow as la...
How to read the RGB value of a given pixel in Python?
...
Fortunately installing PIL is very straightforward in Linux and Windows (don't know about Mac)
– heltonbiker
Sep 28 '11 at 16:20
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Check whether a cell contains a substring
...
@renatov that actually depends on the locale of your OS; specifically, the character used for "list separator".
– pepoluan
Jul 9 '15 at 7:38
...
How can I make my custom objects Parcelable?
...
Do I have to actually implement the encoding/decoding parts if I only send them using LocalBroadcastManager? Is it enough to implement Parcelable and put as extra?
– JohnyTex
Feb 3 '16 at 13:29
...
Mongod complains that there is no /data/db folder
...ere you can create the data directory in another location, but that's generally not a good idea, because it just slightly complicates things such as DB recovery, because you always have to specify the db-path manually. I wouldn't recommend doing that.
Edit:
the error message you're getting is ...
How to pre-populate the sms body text via an html link
...4.4). There are some reports that they might not be working anymore, especially with Android's switch to using Hangouts instead of a native SMS app. I'll look into it when I have the chance.
– Brad Orego
Jan 24 '14 at 17:04
...