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When to use MongoDB or other document oriented database systems? [closed]
...cal CRUD stuff. Storing what is essentially a huge hash, and being able to select on any of those keys, is what most people use a relational database for. If your DB is 3NF and you don’t do any joins (you’re just selecting a bunch of tables and putting all the objects together, AKA what most peo...
What is the advantage to using bloom filters?
...riefly tell the basics.
you initiate an empty bit array of length m
you select k different hash functions (the more independent the better)
if you want to add element, you calculate all the k hashes of this value and set the corresponding bits to 1
if you want to check if element exist, you also ...
Export Data from mysql Workbench 6.0
...MYSQLWorkbench.app/Contents/Resources/plugins - right click on the app and select Show Package contents to get inside the app (thanks to Bradley Flood)
c) Linux Ubuntu: /usr/lib/mysql-workbench/modules (thanks to Alessandro Lopes)
Open file wb_admin_export_options.py
Find line "delayed-insert":["Wr...
In Django, how does one filter a QuerySet with dynamic field lookups?
...
A simplified example:
In a Django survey app, I wanted an HTML select list showing registered users. But because we have 5000 registered users, I needed a way to filter that list based on query criteria (such as just people who completed a certain workshop). In order for the survey eleme...
How can I find all of the distinct file extensions in a folder hierarchy?
...
Powershell:
dir -recurse | select-object extension -unique
Thanks to http://kevin-berridge.blogspot.com/2007/11/windows-powershell.html
share
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impr...
Xcode 4.5 Storyboard 'Exit'
... for your unwind segue and then connect from an element to the exit button selecting the method you wish to call. You can find an example here (I have updated my answer as well to include the example)
– Alladinian
Oct 22 '12 at 8:18
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Should I use #define, enum or const?
... this type. To track the current state of a record and to create a mask to select records in certain states. Create an inline function to test if the value of the type is valid for your purpose; as a state marker vs a state mask. This will catch bugs as the typedef is just an int and a value such as...
Undefined symbols for architecture arm64
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Just came in here to add to the chorus: selecting YES for BUILD FOR ACTIVE ARCHITECTURES is the best option here.
– Wells
Mar 28 '14 at 20:35
56
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How to add an Access-Control-Allow-Origin header
...for the file
scroll down to the file
click the cog icon
click Edit Headers
select Access-Control-Allow-Origin
add the single character '*' (without the quotes)
hit enter
repeat for the other files
If you need to continue and do #2, then you'll need a command line with CURL
curl -D - --header "X-A...
C# DLL config file
...n.GetType() == typeof(ConnectionStringsSection)
select section).FirstOrDefault() as ConnectionStringsSection;
if (connSection != null)
{
list.AddRange(connSection.ConnectionStrings.Cast<ConfigurationElement>());
}
}
/// &l...