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Rails Object to hash
... @post.as_json
puts hash.pretty_inspect
Will output :
{
:name => "test",
:post_number => 20,
:active => true
}
To go a bit further, you could override that method in order to customize the way your attributes appear, by doing something like this :
class Post < ActiveRecord::...
What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
...efile*/
x := foo
y := $(x) bar
x := later
a = foo
b = $(a) bar
a = later
test:
@echo x - $(x)
@echo y - $(y)
@echo a - $(a)
@echo b - $(b)
make test prints:
x - later
y - foo bar
a - later
b - later bar
Check more elaborate explanation here
...
What does -save-dev mean in npm install grunt --save-dev
..., then they probably don't want or need to download and build the external test or documentation framework that you use.
In other words, when you run npm install, your project's devDependencies will be installed, but the devDependencies for any packages that your app depends on will not be install...
How do I migrate a model out of one django app and into a new one?
...
Not doing this might make tests fail too (they always seem to run full south migrations when creating their test database). I've done something similar before. Good catch Ihor :)
– odinho - Velmont
Oct 8 '14 at 1...
Why doesn't list have safe “get” method like dictionary?
...titem__(index)
except IndexError:
return default
def _test():
l = safelist(range(10))
print l.get(20, "oops")
if __name__ == "__main__":
_test()
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How can I exclude all “permission denied” messages from “find”?
...ly")
Works with: find (GNU findutils) 4.4.2.
Background:
The -readable test matches readable files. The ! operator returns true, when test is false. And ! -readable matches not readable directories (&files).
The -prune action does not descend into directory.
! -readable -prune can be transla...
Multi-statement Table Valued Function vs Inline Table Valued Function
...mewhat like a VIEW in that it will calculate an execution plan using the latest statistics on the tables in question. A MSTVF is equivalent to stuffing the entire contents of your SELECT statement into a table variable and then joining to that. Thus, the compiler cannot use any table statistics on t...
How do I get the size of a java.sql.ResultSet?
...n the statement is created with the scroll insensitive option: ps=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
– BullyWiiPlaza
Feb 21 '17 at 13:55
...
Filter rows which contain a certain string
...str", "", object) # -> "ingr"
Benchmark
The results of the benchmark test are as follows. For large dataframe, str_detect is faster.
library(rbenchmark)
library(tidyverse)
# The data. Data expo 09. ASA Statistics Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html...
Finding quaternion representing the rotation from one vector to another
...bout there not being a unique rotation, but the above should give the "shortest arc," which is probably what you need.
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