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ImageUtil 扩展:图像工具扩展,提供图像处理和变换功能 · App Inventor 2 中文网
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组件:组件类型,目标图像组件
返回值:列表类型,包含图像属性的列表(宽度、高度等)
Resize 调整大小(组件,新宽度,新高度)
调整图像大小到指定尺寸。
组件:组件类型,目标图像组件
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Popup弹出菜单扩展 · App Inventor 2 中文网
...项
从字符串设置菜单项
从列表设置菜单项
从文件加载菜单项
菜单项定义格式
菜单文本
图标名称
复选框
其他设置
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How do I load a file from resource folder?
...ntextClassLoader();
InputStream is = classloader.getResourceAsStream("test.csv");
If the above doesn't work, various projects have been added the following class: ClassLoaderUtil1 (code here).2
Here are some examples of how that class is used:
src\main\java\com\company\test\YourCallingClass.ja...
R command for setting working directory to source file location in Rstudio
...s/proyect1").
Once you set that, you can navigate to a subdirectory: read.csv("DATA/mydata.csv"). Is the same as read.csv("D:/Documents/proyect1/DATA/mydata.csv").
If you want to navigate to a parent folder, you can use "../".
For example: read.csv("../olddata/DATA/mydata.csv") which is the same ...
UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte
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This doesn't seem real clear. When importing a csv file how do you use this code?
– Dave
Sep 17 '19 at 15:13
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Make iframe automatically adjust height according to the contents without using scrollbar? [duplicat
...is library is that it can't handle vh.
– Rickard Elimää
Jul 15 '19 at 7:59
@RickardElimää would be happy to take a...
Having options in argparse with a dash
...help='Directory with .log and .log.gz files')
parser.add_argument('results-csv', type=argparse.FileType('w'),
default=sys.stdout,
help='Output .csv filename')
args = parser.parse_args()
print args
# gives
# Namespace(logs-dir='./', results-csv=<open file '...
select * vs select column
...using string keys or property names if using ORM.
– Lèse majesté
Jul 5 '10 at 15:04
11
saw this...
App Inventor 2在不同的屏幕之间传值 · App Inventor 2 中文网
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通过原生控制块“打开屏幕并传值”
列表传值
微数据库传值
« 返回首页
App Inventor 2 在不同的屏幕之间传值属于很常见的需求,这里提供各种不同的实现思路,供大家参考。
通过原生控制块“打开屏幕...
MIT已发布v2.75版本,中文网已同步升级最新版本 - App Inventor 2 中文网 -...
...习和使用,才能与大家分享。
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列表显示框组件有进一步的改进在上个版本(2022)中,列表显示框可以同时显示图片、主项及细项三部分内容,这个版本延续了这一功能,并在显示样式方面做了一些改进...
