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dynamic_cast and static_cast in C++
...n order for the cast to be legal.
Casts can go in one of two directions: from base to derived (B2D) or from derived to base (D2B). It's simple enough to see how D2B casts would work at runtime. Either ptr was derived from Type or it wasn't. In the case of D2B dynamic_cast<>s, the rules ar...
convert ArrayList to JSONArray
...
If I read the JSONArray constructors correctly, you can build them from any Collection (arrayList is a subclass of Collection) like so:
ArrayList<String> list = new ArrayList<String>();
list.add("foo");
list.add("baar");
JSONArray jsArray = new JSONArray(list);
References:
j...
Access nested dictionary items via a list of keys?
...
Use reduce() to traverse the dictionary:
from functools import reduce # forward compatibility for Python 3
import operator
def getFromDict(dataDict, mapList):
return reduce(operator.getitem, mapList, dataDict)
and reuse getFromDict to find the location to sto...
Accessing MVC's model property from Javascript
...rm, there's no need to add a ; at the end of it? Because I do get a prompt from VS stating the statement isn't terminated. But when I try to add ; the code doesn't run
– Null Reference
May 3 '13 at 14:37
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What's the difference between Git Revert, Checkout and Reset?
...ar.
git revert
This command creates a new commit that undoes the changes from a previous commit. This command adds new history to the project (it doesn't modify existing history).
git checkout
This command checks-out content from the repository and puts it in your work tree. It can also have oth...
Python Selenium accessing HTML source
...
You need to access the page_source property:
from selenium import webdriver
browser = webdriver.Firefox()
browser.get("http://example.com")
html_source = browser.page_source
if "whatever" in html_source:
# do something
else:
# do something else
...
EF Code First “Invalid column name 'Discriminator'” but no inheritance
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Turns out that Entity Framework will assume that any class that inherits from a POCO class that is mapped to a table on the database requires a Discriminator column, even if the derived class will not be saved to the DB.
The solution is quite simple and you just need to add [NotMapped] as an attr...
Reading a key from the Web.Config using ConfigurationManager
I am trying to read the keys from the Web.config file in a different layer than the web layer (Same solution)
10 Answers
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How to prevent UINavigationBar from covering top of view in iOS 7?
...igationController.navigationBar.translucent = NO;
This will fix the view from being framed underneath the navigation bar and status bar.
If you have to show and hide the navigation bar, then use
if ([self respondsToSelector:@selector(edgesForExtendedLayout)])
self.edgesForExtendedLayout = U...
How can I String.Format a TimeSpan object with a custom format in .NET?
...self must be escaped unless you're using a verbatim string).
This excerpt from the MSDN Custom TimeSpan Format Strings page explains about escaping the ":" and "." characters in a format string:
The custom TimeSpan format specifiers do not include placeholder separator symbols, such as the symb...