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Group by with multiple columns using lambda
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Further to aduchis answer above - if you then need to filter based on those group by keys, you can define a class to wrap the many keys.
return customers.GroupBy(a => new CustomerGroupingKey(a.Country, a.Gender))
.Where(a => a.Key.Country == "Ireland" &&...
Get an object properties list in Objective-C
...aving to specify the properties in a copy method. Parts of this answer are based on the other answers to this question but it provides a cleaner interface to the desired functionality.
Header:
// SYNUtilities.h
#import <Foundation/Foundation.h>
@interface SYNUtilities : NSObject
+ (NSDict...
Git rebase: conflicts keep blocking progress
...anges to master, that I want to get into v4. So, in v4, I tried to do a rebase from master, and one file keeps screwing things up: a one-line text file, that contains the version number. This file is app/views/common/version.txt , which before rebasing contains this text:
...
What's the difference between IQueryable and IEnumerable
...e an IQueryable, then the query may be converted to sql and run on the database server
If you create an IEnumerable, then all rows will be pulled into memory as objects before running the query.
In both cases if you don't call a ToList() or ToArray() then query will be executed each time it is use...
When should I use require() and when to use define()?
...ling dependency loading
define is used to define named or unnamed modules based on the proposal using the following signature:
define(
module_id /*optional*/,
[dependencies] /*optional*/,
definition function /*function for instantiating the module or object*/
);
require on the other hand is ty...
Using Rails 3.1 assets pipeline to conditionally use certain css
...pp/assets/stylesheets folder:
app/assets/stylesheets
+-- all
+-- your_base_stylesheet.css
+-- print
+-- blueprint
+-- print.css
+-- your_print_stylesheet.css
+-- ie
+-- blueprint
+ ie.css
+-- your_ie_hacks.css
+-- application-all.css
+-- application-print.css
+--...
Count number of matches of a regex in Javascript
...tch(/b/g) || []).length; // 0
(('a a a').match(/a/g) || []).length; // 3
Based on https://stackoverflow.com/a/48195124/16777 but fixed to actually work in zero-results case.
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Disable Interpolation when Scaling a
...up citing this question in his research).
See Simon's answer for a canvas-based solution that relies on the imageSmoothingEnabled property (not available in older browsers, but simpler than pre-scaling and pretty widely-supported).
Live Demo
If you'd like to test the CSS properties discussed in t...
Does file_get_contents() have a timeout setting?
...me work when i change my php.ini in my host:
; Default timeout for socket based streams (seconds)
default_socket_timeout = 300
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Case statement with multiple values in each 'when' block
...d less easy to handle for the language to have tokens that change behavior based on context, and then you wouldn't be able to use a real or expression on the right side of a when.
– Taywee
Aug 23 '18 at 19:46
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