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Why is it important to override GetHashCode when Equals method is overridden?
...t if your item will be used as a key in a dictionary, or HashSet<T>, etc - since this is used (in the absence of a custom IEqualityComparer<T>) to group items into buckets. If the hash-code for two items does not match, they may never be considered equal (Equals will simply never be call...
What is causing ERROR: there is no unique constraint matching given keys for referenced table?
...ed in postgresql only but also it other RDBMSs too like oracle, sql server etc.
– Mufachir Hossain
May 12 '19 at 4:32
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Is there a way to cache GitHub credentials for pushing commits?
...ou need to copy the git-credential-netrc anywhere in your path ($PATH), in order for git to be able to call 'credential-netrc'.
– VonC
Dec 22 '13 at 0:14
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MySQL, Check if a column exists in a table with SQL
...ve to wrap the whole thing in a procedure which allows statements like IF, etc. See stackoverflow.com/questions/7384711/… for an example of how to wrap a procedure around the test for the column and the conditional DML statement.
– Christopher Schultz
Jul 23 ...
mongodb count num of distinct values per field/key
...hie said is that if the grouping is done just "regular" field (string, int etc.) then you don't need the unwind step. Isn't it correct?
– guyarad
Oct 19 '17 at 10:00
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Determine if the device is a smartphone or tablet? [duplicate]
...his is below. If you wish to know something based on sensors, screen size, etc then this is really a different question.
Also, while using screen resolution, or the resource managements large vs xlarge, may have been a valid approach in the past new 'Mobile' devices are now coming with such large ...
What is two way binding?
...o-way binding extensions do exist for Backbone as well (in raw, subjective order of decreasing complexity): Epoxy, Stickit, ModelBinder…
One cool thing with Epoxy, for instance, is that it allows you to declare your bindings (model attributes <-> view's DOM element) either within the templa...
How to send an object from one Android Activity to another using Intents?
...an one field to retrieve from a given Parcel, you must do this in the same order you put them in (that is, in a FIFO approach).
Once you have your objects implement Parcelable it's just a matter of putting them into your Intents with putExtra():
Intent i = new Intent();
i.putExtra("name_of_extra",...
How do I clear the terminal screen in Haskell?
...s functions for clearing the screen, displaying colors, moving the cursor, etc. Using it to clear the screen is easy: (this is with GHCI) import System.Console.ANSIclearScreen
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Regarding 'main(int argc, char *argv[])' [duplicate]
...= 9
argv[ 4 ] = 1
argv[ 5 ] = 4
argv[ 6 ] = 5
[The char strings "2", "8" etc. can be converted to number using some character to number conversion function, e.g. atol() (link)]
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