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乐高机器人®组件 · App Inventor 2 中文网
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DrawCircle(color,x,y,radius,fill)
Draw a circle on the screen.
DrawIcon(color,x,y,type,no)
Draw a built-in icon on screen.
DrawLine(color,x1,y1,x2,y2)
Draw a line on the screen.
DrawPoint(color,x,y)
Draw a point on the screen.
DrawRect(color,x,y,width,height,fil...
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
... redirects output to a file, information messages are still printed on the screen and not to the output file.
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Disabling user selection in UIWebView
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On iOS 9.x an empty call out appears at top of screen after long press, even when using above.
– DwarDoh
Oct 29 '15 at 0:22
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How do I navigate in the results of Diff
...s
Use
j or ↓ to move down one line at a time
d to move by half the page screen
f to move by a whole page screen
For scrolling upwards use
k or ↑ to move up one line at a time
u to move by half the page screen
b to move by a whole page screen
press q to quit out of the log
It will returns to ...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
...orary estimate/placeholder for the row heights of cells that are not yet onscreen. Then, when these cells are about to scroll on screen, the actual row height will be calculated. To determine the actual height for each row, the table view automatically asks each cell what height its contentView need...
How do you install an APK file in the Android emulator?
...leName.apk
If the operation is successful (the result is displayed on the screen), then you will find your file in the launcher of your emulator.
Mac:
PATH=$PATH:~/Library/Android/sdk/platform-tools
Example : PATH=$PATH:/users/jorgesys/eclipse/android-sdk-mac_64/tools
Then run adb.
Mac:
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FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
...:android="http://schemas.android.com/apk/res/android"
android:id="@+id/screen_container"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView android:id="@+id/text"
android:layout_width="match_parent" andr...
getting exception “IllegalStateException: Can not perform this action after onSaveInstanceState”
...This can also happen when calling dismiss() on a dialog fragment after the screen has been locked\blanked and the Activity + dialog's instance state has been saved. To get around this call:
dismissAllowingStateLoss()
Literally every single time I'm dismissing a dialog i don't care about it's sta...
Static nested class in Java, why?
....java (resources) file.
Res folder of android contains layouts (containing screen designs), drawable folder (containing images used for project), values folder (which contains string constants), etc..
Sine all the folders are part of Res folder, android tool generates a R.java (resources) file whic...
Plot correlation matrix into a graph
...outline=TRUE, addcolorlabel="no")
## like Chinese wiqi, suit for either on screen or white-black print.
corrplot(M, col = wb, bg="gold2", order="AOE", addcolorlabel="no")
}
For example:
Rather elegant IMO
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