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How do you see the entire command history in interactive Python?
I'm working on the default python interpreter on Mac OS X, and I Cmd + K (cleared) my earlier commands. I can go through them one by one using the arrow keys. But is there an option like the --history option in bash shell, which shows you all the commands you've entered so far?
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String comparison in Python: is vs. == [duplicate]
I noticed a Python script I was writing was acting squirrelly, and traced it to an infinite loop, where the loop condition was while line is not '' . Running through it in the debugger, it turned out that line was in fact '' . When I changed it to !='' rather than is not '' , it worked fine.
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Check if page gets reloaded or refreshed in JavaScript
...ome had recently change this behavior. When user click current address bar and hit enter, the value of performance.navigation.type will be 1 which should be 0. I tested in Version 56. Not sure why.
– Jackwin tung
Feb 19 '17 at 9:28
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C++ obtaining milliseconds time on Linux — clock() doesn't seem to work properly
...unds it to the nearest 1000 so the precision is only to the "second" level and not to the milliseconds level.
16 Answers
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PHP mkdir: Permission denied problem
...to set the permissions to 777, that is a security problem as it gives read and write access to the world. It may be that your apache user does not have read/write permissions on the directory.
Here's what you do in Ubuntu
Make sure all files are owned by the Apache group and user. In Ubuntu it is...
Rails 3 - can't install pg gem
...g= 'PATH_TO_YOUR_PG_CONFIG'
If you are not sure where your pg_config is, and assuming you are on Linux or Mac, you can run the following command:
which pg_config
Your pg-config can be in different locations depending on how you installed postgres.
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retrieve links from web page using python and BeautifulSoup [closed]
How can I retrieve the links of a webpage and copy the url address of the links using Python?
16 Answers
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How do I convert a double into a string in C++?
...y:
std::string str = boost::lexical_cast<std::string>(dbl);
The Standard C++ way:
std::ostringstream strs;
strs << dbl;
std::string str = strs.str();
Note: Don't forget #include <sstream>
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How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app
...e Microsoft.Web.Optimization package is now obsolete. With ASP.NET (MVC) 4 and higher you should install the Microsoft ASP.NET Web Optimization Framework:
Install the package from nuget:
Install-Package Microsoft.AspNet.Web.Optimization
Create and configure bundle(s) in App_Start\BundleConfig.cs...
Difficulty with ng-model, ng-repeat, and inputs
I am trying to allow the user to edit a list of items by using ngRepeat and ngModel . ( See this fiddle .) However, both approaches I've tried lead to bizarre behavior: one doesn't update the model, and the other blurs the form on each keydown.
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