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App Inventor 2 手势识别扩展教程 - GestureDetector · App Inventor 2 中文网
...Auto
global 是否放大 = false
} else {
图像1.WidthPercent = 200
图像1.HeightPercent = 200
global 是否放大 = true
}
}
when GestureDetector1.OnLongPress(X, Y) {
文件增强1.CopyFile(图像1.Picture, join("/sdcard/DCIM/收藏图片_", 当前索引, ".png"))
Notifie...
How to assign from a function which returns more than one value?
...uld make it easier for for people to use it.
– merlin2011
Apr 14 '14 at 7:29
12
I agree with @mer...
How to post pictures to instagram using API
...ms final score.
– Dawson Irvine
Jan 20 '19 at 3:35
1
Fair point. @BrodaNoel, maybe I should chang...
Java dynamic array sizes?
... 0; i < 10; i++) {
oldItems[i] = i + 10;
}
int[] newItems = new int[20];
System.arraycopy(oldItems, 0, newItems, 0, 10);
oldItems = newItems;
If you find yourself in this situation, I'd highly recommend using the Java Collections instead. In particular ArrayList essentially wraps an array a...
Fastest way to tell if two files have the same contents in Unix/Linux?
...se ... fi
– VasiliNovikov
Jul 19 at 20:04
as @VasiliNovikov pointed out, you can just do if command; then ... else ......
How to copy data to clipboard in C#
...ndows.Forms reference. The following steps work in Visual Studio Community 2013 with .NET 4.5:
In Solution Explorer, expand your console project.
Right-click References, then click Add Reference...
In the Assemblies group, under Framework, select System.Windows.Forms.
Click OK.
Then, add the fol...
Overriding id on create in ActiveRecord
...
answered Oct 2 '09 at 20:55
Jeff DeanJeff Dean
...
How do I fix “Failed to sync vcpu reg” error?
... answered Aug 23 '13 at 14:07
JP2014JP2014
4,47322 gold badges1515 silver badges1515 bronze badges
...
HashSet vs. List performance
...hort strings, the advantage went away after size 5, for objects after size 20.
1 item LIST strs time: 617ms
1 item HASHSET strs time: 1332ms
2 item LIST strs time: 781ms
2 item HASHSET strs time: 1354ms
3 item LIST strs time: 950ms
3 item HASHSET strs time: 1405ms
4 item LIST strs time: 1126ms
4...
delegate keyword vs. lambda notation
...
Amy BAmy B
97.7k2020 gold badges126126 silver badges172172 bronze badges
...