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Web-scraping JavaScript page with Python
...simple example:
class MySpider(scrapy.Spider):
name = "jsscraper"
start_urls = ["http://quotes.toscrape.com/js/"]
def start_requests(self):
for url in self.start_urls:
yield SplashRequest(
url=url, callback=self.parse, endpoint='render.html'
)
d...
Try catch statements in C
...intf("Exception happened here\n");
} else {
// Normal code execution starts here
Test();
}
}
void Test() {
// Rough equivalent of `throw`
longjmp(s_jumpBuffer, 42);
}
This website has a nice tutorial on how to simulate exceptions with setjmp and longjmp
http://www.di.unipi.it/~...
Python dictionary: are keys() and values() always the same order?
...
Yes. Starting with CPython 3.6, dictionaries return items in the order you inserted them.
Ignore the part that says this is an implementation detail. This behaviour is guaranteed in CPython 3.6 and is required for all other Pyth...
Spring @Autowired usage
...peated all over. To me this seems to have the potential for errors.
I've started using auto-wiring almost exclusively at work because we depend so much on Spring integration anyway that the dependency issue is moot. I worked on a Spring MVC project that used auto-wiring extensively and was a littl...
Zooming editor window android studio [duplicate]
...for finding application functions. In the preferences dialog, you can just start typing to do search (you can just start typing from a lot of places in the UI to begin a search); there's also a search box.
There's a key binding for searching actions by name; on MacOS it's command-shift-A. That's a ...
How to split one string into multiple strings separated by at least one space in bash shell?
...ingarray=($sentence)
now you can access individual elements directly (it starts with 0):
echo ${stringarray[0]}
or convert back to string in order to loop:
for i in "${stringarray[@]}"
do
:
# do whatever on $i
done
Of course looping through the string directly was answered before, but th...
Design patterns to avoid [closed]
...s but those described in the first chapter of GoF book are quite useful to start with.
Program to an 'interface', not an 'implementation'. (Gang of Four 1995:18)
Favor 'object composition' over 'class inheritance'. (Gang of Four 1995:20)
Let those sink in on you for a while. It should be noted t...
VC DDE（Dynamic Data Exchange）与EXCEL连接 - C/C++ - 清泛网 - 专注C/C++及内核技术
...: 0xx\n", iReturn);
Sleep(1500);
return 0;
}
//Start DDE Server and wait for it to become idle.
HINSTANCE hRet = ShellExecute(0, "open", szTopic, 0, 0, SW_SHOWNORMAL);
if ((int)hRet < 33)
{
printf("Unable to Start DDE Server: 0xx\n", hRet);
...
How to debug Visual Studio extensions
...and select Properties
Go to the Debug Tab
Click on the radio button for Start External Program. Point it to the devenv.exe binary. On my machine it's located at
C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe
On a non x64 machine though you can remove the " (x8...
How to kill an Android activity when leaving it so that it cannot be accessed from the back button?
In an given Android activity, I would like to start a new activity for the user at some point. Once they leave the first activity and arrive at the second, the first activity is stale and I want to remove it completely so it can not be accessed again from the back button.
...