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Ruby on Rails. How do I use the Active Record .build method in a :belongs to relationship?
... @alock27 Same as how ActiveRecord uses method missing for your find_by_email and find_by_column_name methods. It converts the method you pass to a string and dissects it and tries to match it with your table's column names.
– bigpotato
Oct 16 '13 at 17:5...
Find the most common element in a list
... obvious one (for non-hashable but comparable elements) -- [itertools.groupby][1]. itertools offers fast, reusable functionality, and lets you delegate some tricky logic to well-tested standard library components. Consider for example:
import itertools
import operator
def most_common(L):
# get...
ReactJS - Does render get called any time “setState” is called?
...-render all components and sub-components every time setState is called?
By default - yes.
There is a method boolean shouldComponentUpdate(object nextProps, object nextState), each component has this method and it's responsible to determine "should component update (run render function)?" every t...
Using mixins vs components for code reuse in Facebook React
... React's lifecycle methods (componentDidMount etc). This problem is solved by the Higher-Order Components that Dan Abramov talk in his link (or by using ES6 class inheritance).
Mixins are also often used in frameworks, to make framework API available to all the components, by using the "hidden" con...
Why do table names in SQL Server start with “dbo”?
...he time in SQL it's good to be explicit.
– SurroundedByFish
Jun 30 '09 at 13:56
3
@SurroundedByFi...
“Templates can be used only with field access, property access, single-dimension array index, or sin
... @Html.DisplayFor(m => !item.IsIdle, "BoolIcon")
}
I solved this just by doing
@foreach (var item in Model)
{
var active = !item.IsIdle;
@Html.DisplayFor(m => active , "BoolIcon")
}
When you know the trick, it's simple.
The difference is that, in the first case, I passed a method...
How do I pause my shell script for a second before continuing?
...le not the right way to do it, you can combine the python answer with Bash by using python -c "import time; time.sleep(1)" instead of sleep 1 :)
– Berry M.
Jul 10 '17 at 7:11
...
Sublime text 2 - find and replace globally ( all files and in all directories )
...ou need to modify and then use normal search and replace (cmd+alt+F), file by file.
– Riccardo Marotti
Jan 8 '13 at 8:44
...
What is the apply function in Scala?
...ods:
f.toString
Or we could define another Function1[Int,Int] object by calling compose method on f and chaining two different functions together:
val f2 = f.compose((x:Int) => x - 1)
Now if we want to actually execute the function, or as mathematician say "apply a function to its argum...
Update built-in vim on Mac OS X
...'s answer or a package manager. There's also one other option: this answer by Slizzered on serverfault.com, which allows you to pass aliases to sudo.
– Brian McCutchon
Aug 28 '14 at 20:35
...