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Flags to enable thorough and verbose g++ warnings
Often in C under gcc , I will start with the following set of warning flags (painfully assembled from multiple sources):
5...
How to reset postgres' primary key sequence when it falls out of sync?
...sort to the ALTER SEQUENCE syntax i.e.
ALTER SEQUENCE table_name_id_seq RESTART WITH 1;
ALTER SEQUENCE table_name_id_seq RESTART; -- 8.4 or higher
But ALTER SEQUENCE is of limited use because the sequence name and restart value cannot be expressions.
It seems the best all-purpose solution is to ...
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/~...
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...
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...
How to set cursor position in EditText?
...the page a text is set in the first EditText, So now cursor will be in the starting place of EditText , I want to set cursor position in the second EditText which contains no data. How to do this?
...
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...
Why are #ifndef and #define used in C++ header files?
I have been seeing code like this usually in the start of header files:
4 Answers
4
...
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...