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Using HTML5/Canvas/JavaScript to take in-browser screenshots
... this presentation by Elliott Sprehn from the Google Feedback team:
http://www.elliottsprehn.com/preso/fluentconf/
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can we use xpath with BeautifulSoup?
... from urllib.request import urlopen
from lxml import etree
url = "http://www.example.com/servlet/av/ResultTemplate=AVResult.html"
response = urlopen(url)
htmlparser = etree.HTMLParser()
tree = etree.parse(response, htmlparser)
tree.xpath(xpathselector)
There is also a dedicated lxml.html() modul...
What is the facade design pattern?
...ls of the subsystems, making it easier to modify the system later.
http://www.dofactory.com/Patterns/PatternFacade.aspx
http://www.blackwasp.co.uk/Facade.aspx
Also, what is important while learning design patterns is to be able to recognize which pattern fits your given problem and then using it ...
Conveniently map between enum and int / String
...
http://www.javaspecialists.co.za/archive/Issue113.html
The solution starts out similar to yours with an int value as part of the enum definition. He then goes on to create a generics-based lookup utility:
public class ReverseEnum...
How can strings be concatenated?
...
To concatenate strings in python you use the "+" sign
ref: http://www.gidnetwork.com/b-40.html
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quick random row selection in Postgres
...
Check this link out for some different options.
http://www.depesz.com/index.php/2007/09/16/my-thoughts-on-getting-random-row/
Update: (A.Hatchkins)
The summary of the (very) long article is as follows.
The author lists four approaches:
1) ORDER BY random() LIMIT 1; -- slow
...
Difference between map and collect in Ruby?
...Actually they are documented in the same place under ruby-doc.org:
http://www.ruby-doc.org/core/classes/Array.html#M000249
ary.collect {|item| block } → new_ary
ary.map {|item| block } → new_ary
ary.collect → an_enumerator
ary.map → an_enumerator
Invokes block once for ...
SQLite with encryption/password protection
... Get the docs from here system.data.sqlite.org/index.html/doc/trunk/www/index.wiki
– Mangesh
Apr 26 '16 at 15:51
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Setting Authorization Header of HttpClient
... likes me.
using (var client = new HttpClient())
{
var url = "https://www.theidentityhub.com/{tenant}/api/identity/v1";
client.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessToken);
var response = await client.GetStringAsync(url);
// Parse JSON response.
....
}
r...
App Inventor 2 上传文件和图片到服务器教程 · App Inventor 2 中文网
...
Web客户端1.RequestHeaders = list(list("Content-Type", "application/x-www-form-urlencoded"))
Web客户端1.PostText(join("data=", Web客户端1.UriEncode(global_Base64Data)))
}
注意：文件管理器1.转换为文件路径 方法用于将外部路径（如相册返回的路径）转换...