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setState vs replaceState in React.js
...e, it throws out the current state, and replaces it with only what you provide. Usually setState is used unless you really need to remove keys for some reason; but setting them to false/null is usually a more explicit tactic.
While it's possible it could change; replaceState currently uses the obj...
Read input from console in Ruby?
I want to write a simple A+B program in ruby, but I have no idea how to work with the console.
5 Answers
...
Visual Studio Post Build Event - Copy to Relative Directory Location
...f $(ProjectName) in the source-part.
– Alexander Schmidt
Apr 1 '13 at 15:25
2
update to my prev. ...
How to merge 2 JSON objects from 2 files using jq?
...
"value4": 4
}
},
"status": 200
}
If you also want to get rid of the other keys (like your expected result), one way to do it is this:
jq -s '.[0] * .[1] | {value: .value}' file1 file2
Or the presumably somewhat more efficient (because it doesn't merge any other values):
jq -s '....
Rounded UIView using CALayers - only some corners - How?
...ed this code to change it:
http://discussions.apple.com/thread.jspa?threadID=1683876
Make an iPhone project with the View template. In the view controller, add this:
- (void)viewDidLoad
{
CGRect rect = CGRectMake(10, 10, 200, 100);
MyView *myView = [[MyView alloc] initWithFrame:rect];
...
PostgreSQL disable more output
...answered Mar 25 '13 at 17:49
DavideDavide
1,68622 gold badges1212 silver badges1313 bronze badges
...
Emulate ggplot2 default color palette
...65, c = 100)[1:n]
}
For example:
n = 4
cols = gg_color_hue(n)
dev.new(width = 4, height = 4)
plot(1:n, pch = 16, cex = 2, col = cols)
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PermGen elimination in JDK 8
...r’s
Per loader storage area – Metaspace
Linear allocation only
No individual reclamation (except for RedefineClasses and class loading failure)
No GC scan or compaction
No relocation for metaspace objects
Metaspace Tuning
The maximum metaspace size can be set using the -XX:MaxMetaspaceSize fla...
What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
... in, however, is fine to iterate over an object's property. The OP never said the for in was applied to an Array. The hasOwnProperty is best practice, however there are cases where you don't want it - for example if an object extends another, and you want to list both the objects and the 'parent' on...
C++ Double Address Operator? (&&)
I'm reading STL source code and I have no idea what && address operator is supposed to do. Here is a code example from stl_vector.h :
...