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Test whether a list contains a specific value in Clojure
...t and safest solution, as it also handles falsy values like nil and false. Now why is this not part of clojure/core?
– Stian Soiland-Reyes
Apr 8 '14 at 9:03
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psql: could not connect to server: No such file or directory (Mac OS X)
...nstall postgresql
Start server : brew services start postgresql
You should now have to create your databases... (createdb)
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Get a specific bit from byte
...t;< (4-1) == 8 (2^3)
00000001 << (4-1) == 00001000
Now you know how it's done, what's going on at the low level, and why it works.
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how to make a specific text on TextView BOLD
I don't know how to make a specific text on TextView become BOLD.
23 Answers
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Why does 1==1==1 return true, “1”==“1”==“1” return true, and “a...
...o being compared to true and is thus also considered to be equal to true.
Now, the "WHY?!?!" question is explained by the fact that Javascript has its roots in the C-family of languages. In which any number, other than 0 is considered to be a valid true boolean. :-/
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“An attempt was made to load a program with an incorrect format” even when the platforms are the sam
... Thanks a lot. This got me too. Checked build in Configuration Manager and now it works (WPF desktop application).
– Dan Gøran Lunde
May 24 '13 at 10:30
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Is Random class thread safe?
...ing threads at more random times tomorrow than today. I simplified the alg now and updated the description to identify the shortcoming.
– Ryan
Nov 15 '12 at 23:29
add a commen...
How to check if element is visible after scrolling?
...them are only visible if you scroll down the page. Is there any way I can know if an element is now in the visible part of the page?
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quick random row selection in Postgres
...e optimal solution if you want only one row selected, because you need to know the COUNT of the table to calculate the exact percentage.
To avoid a slow COUNT and use fast TABLESAMPLE for tables from 1 row to billions of rows, you can do:
SELECT * FROM my_table TABLESAMPLE SYSTEM(0.000001) LIMI...
Laravel Eloquent: How to get only certain columns from joined tables
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I know, you ask for Eloquent but you can do it with Fluent Query Builder
$data = DB::table('themes')
->join('users', 'users.id', '=', 'themes.user_id')
->get(array('themes.*', 'users.username'));
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