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MultiImagePicker 拓展:图片单选/多选扩展 · App Inventor 2 中文网
...选/多选扩展,解决原生 图像选择器 不能一次选多张图片的问题。也可以选择/多选视频文件。
长按图片,可以一次选择多张:
选择后,返回多张图片的路径列表:
代码块参考如下:
属性
MimeFilter
...
GestureDetector 手势检测拓展:旋转、缩放和滑动手势检测,自定义手势识别...
...
GestureDetector 手势检测拓展
提供完整的手势检测功能,包含五个组件:
RotationDetector:检测双指旋转手势,返回旋转角度(绑定到 Canvas)
ScaleDetector:检测双指缩放/捏合手势,返回缩放比例(绑定到 Canva...
重磅上新!代码大纲:轻松找到对应的代码块 - App Inventor 2 中文网 - 清...
...极调整透明度:
3、搜索联动
代码大纲显示详细的组件相关概览,双击定位指定块。
可以无级调整透明度,记住弹窗状态和弹窗位置。
联动搜索功能,方便查找组件或变量的引用情况。
微调器 · 组件速查 · App Inventor 2 中文网
...界面
微调器
创建可选列表,并根据用户选中的内容执行操作。
微调器列表用户界面
需要的组件:微调器(用户界面)、标签(用户界面)
在设计器里点“微调器1”,打开属性面板,往“字...
numpy matrix vector multiplication [duplicate]
...t; b = a.T
>>> np.dot(a, b)
array([[35, 9, 10],
[ 9, 3, 4],
[10, 4, 6]])
>>> np.inner(a, b)
array([[29, 12, 19],
[ 7, 4, 5],
[ 8, 5, 6]])
Rarer options for edge cases
If you have tensors (arrays of dimension greater than or equal to one)...
reducing number of plot ticks
...MaxNLocator), there is pyplot.locator_params,
pyplot.locator_params(nbins=4)
You can specify specific axis in this method as mentioned below, default is both:
# To specify the number of ticks on both or any single axes
pyplot.locator_params(axis='y', nbins=6)
pyplot.locator_params(axis='x', nbin...
Pandas selecting by label sometimes return Series, sometimes returns DataFrame
...
answered Dec 4 '13 at 19:36
Dan AllanDan Allan
27.4k66 gold badges6060 silver badges6060 bronze badges
...
PHP Regex to get youtube video ID?
... in the query, which is PHP_URL_QUERY.
Now we have the query, which is v=C4kxS1ksqtw&feature=relate, but we only want the part after v=. For this we turn to parse_str which basically works like GET on a string. It takes a string and creates the variables specified in the string. In this case $v...
How to compare two strings in dot separated version format in Bash?
Is there any way to compare such strings on bash, e.g.: 2.4.5 and 2.8 and 2.4.5.1 ?
29 Answers
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