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网上免登陆找素材、处理素材技巧 · App Inventor 2 中文网
...站长素材”平台，不用登陆即可下载声音，体验很不错，网址：https://sc.chinaz.com/yinxiao/。
同样也可以找图片素材：https://sc.chinaz.com/tu/
2、处理图片（在线PS）
功能及体验接近桌面版的Photoshop，无需安装，在线...
网页资料提取器：用 Web 客户端抓网页、按标记提取文字和链接（附 .aia 源...
...见问题
用到的组件
验证范围
网页资料提取：输入网址，选一种提取规则，把网页上的标题、列表、链接或正文提出来，逐条查看、分享，或导出成 CSV 表格。
下载 WebExtractor.aia 返回搜索需求专题
这一篇回答的搜索...
How to change XAMPP apache server port?
...:80
Listen 80
Change the port no to a port no. of your choice (e.g. port 1234) like below
#Listen 12.34.56.78:1234
Listen 1234
3) Next, in the same httpd.conf file look for “ServerName localhost:” Set it to the new port no.
ServerName localhost:1234
4) Save and close the httpd.conf file....
Generate random numbers using C++11 random library
...
space();
cout << "mersenne twister engine with seed 1234" << endl;
//mt19937 dist (1234); //for 32 bit systems
mt19937_64 dist (1234); //for 64 bit systems
for (int i = 0; i<10; ++i)
cout << dist() << ' ';
}
voi...
界面高级组件 · App Inventor 2 中文网
...微信、支付宝等是否已安装，按包名打开；
打开链接：网址用浏览器打开，weixin://、alipays://、tel: 等链接交给对应 App；
打开系统设置：本应用的设置页、通知设置页——用户拒绝了权限或关掉了通知后，引导他去手动开启...
Using curl to upload POST data with files
...Type: multipart/form-data"
-F "data=@test.mp3" http://mysuperserver/media/1234/upload/
Catching the user id as part of the form:
curl -i -X POST -H "Content-Type: multipart/form-data"
-F "data=@test.mp3;userid=1234" http://mysuperserver/media/upload/
or:
curl -i -X POST -H "Content-Type: mul...
Can angularjs routes have optional parameter values?
...on't match if the url doesn't have a trailing slash. So /claims/documents/1234/ matches, but /claims/documents/1234 doesn't.
– James Bell
Nov 21 '14 at 20:40
...
上线当天App就崩了，才发问题是手机网络超时没处理——用App Inventor 2的W...
...• 系统在后台发HTTP请求
• 请求完成后触发获得文本(URL网址, 响应代码, 响应类型, 响应内容)事件
• 在获得文本事件里解析JSON、更新界面
改动三：JSON解析用字典模式
API返回的数据是嵌套JSON，类似：
{"code":200, &q...
How do I compare version numbers in Python?
... actual versions, but is a type of comparison.
For example, version 3.6.0+1234 should be the same as 3.6.0.
import semver
semver.match('3.6.0+1234', '==3.6.0')
# True
from packaging import version
version.parse('3.6.0+1234') == version.parse('3.6.0')
# False
from distutils.version import LooseVe...
Comma separator for numbers in R?
...rn a vector of characters. I'd only use that for printing.
> prettyNum(12345.678,big.mark=",",scientific=FALSE)
[1] "12,345.68"
> format(12345.678,big.mark=",",scientific=FALSE)
[1] "12,345.68"
EDIT: As Michael Chirico says in the comment:
Be aware that these have the side effect of padd...