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How to migrate back from initial migration in Django 1.7?
I created a new app with some models and now I noticed that some of the models are poorly thought out. As I haven't committed the code the sensible thing would be to migrate the database to last good state and redo the migration with better models. In this case the last good state is database where ...
How to shut down the computer from C#
...ower button to boot back up draws about 80-85 milliamps, rather than the standard 300+ish. Will post back here if I find out why. This should not affect most users.
– samuelesque
Feb 27 '14 at 21:29
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Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies. Manifest definition do
...ensured all my projects used the same version by running the following command and checking the results:
update-package Newtonsoft.Json -reinstall
And, lastly I removed the following from my web.config:
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="3...
Case insensitive string compare in LINQ-to-SQL
I've read that it's unwise to use ToUpper and ToLower to perform case-insensitive string comparisons, but I see no alternative when it comes to LINQ-to-SQL. The ignoreCase and CompareOptions arguments of String.Compare are ignored by LINQ-to-SQL (if you're using a case-sensitive database, you get a ...
How do I select a random value from an enumeration?
Given an arbitrary enumeration in C#, how do I select a random value?
9 Answers
9
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Mongodb Explain for Aggregation framework
...t, $geonear at the beginning of a pipeline) as well as subsequent $lookup and $graphLookup stages. Once data has been fetched into the aggregation pipeline for processing (e.g. passing through stages like $project, $unwind, and $group) further manipulation will be in-memory (possibly using temporar...
Using 'return' in a Ruby block
... method, that's why you have LocalJumpError
break returns value from block and ends its call. If your block was called by yield or .call, then break breaks from this iterator too
next returns value from block and ends its call. If your block was called by yield or .call, then next returns value to l...
Programmatically scroll a UIScrollView
...at I end up with a slideshow that runs on its own with a click of a button and a configurable pause between each scroll?
9 ...
Geometric Mean: is there a built-in?
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Here is a vectorized, zero- and NA-tolerant function for calculating geometric mean in R. The verbose mean calculation involving length(x) is necessary for the cases where x contains non-positive values.
gm_mean = function(x, na.rm=TRUE){
exp(sum(log...
How can I apply a function to every row/column of a matrix in MATLAB?
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Many built-in operations like sum and prod are already able to operate across rows or columns, so you may be able to refactor the function you are applying to take advantage of this.
If that's not a viable option, one way to do it is to collect the rows or c...