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Underscore prefix for property and method names in JavaScript
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100
JavaScript actually does support encapsulation, through a method that involves hiding members ...
try/catch + using, right syntax
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100
I prefer the second one. May as well trap errors relating to the creation of the object as wel...
Classes residing in App_Code is not accessible
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+100
Right click on the .cs file in the App_Code folder and check its properties.
Make sure the "Build Action" is set to "Compile".
...
Remove NA values from a vector
...tc.)
Setting na.rm=TRUE does just what you're asking for:
d <- c(1, 100, NA, 10)
max(d, na.rm=TRUE)
If you do want to remove all of the NAs, use this idiom instead:
d <- d[!is.na(d)]
A final note: Other functions (e.g. table(), lm(), and sort()) have NA-related arguments that use diff...
One-liner to take some properties from object in ES 6
...object.
const person = {
fname: 'tom',
lname: 'jerry',
aage: 100,
}
let newPerson = {};
({fname: newPerson.fname, lname: newPerson.lname} = person);
console.log(newPerson);
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List comprehension in Ruby
...mprehensionTest < ActionController::PerformanceTest
TEST_ARRAY = (1..100).to_a
def test_map_compact
1000.times do
TEST_ARRAY.map{|x| x % 2 == 0 ? x * 3 : nil}.compact
end
end
def test_select_map
1000.times do
TEST_ARRAY.select{|x| x % 2 == 0 }.map{|x| x * 3}
...
What are the best Haskell libraries to operationalize a program? [closed]
... MB total memory in use
%GC time 0.0% (6.1% elapsed)
Productivity 100.0% of total user, 0.0% of total elapsed
You can get this in machine-readable format too:
$ ./A +RTS -t --machine-readable
[("bytes allocated", "64952")
,("num_GCs", "1")
,("average_bytes_used", "43784")
,("max_byt...
What is fastest children() or find() in jQuery?
...level of divs.
children() begins to outperform find() when there are over 100 levels of nesting and around 4000+ divs for find() to traverse. It's a rudimentary test case, but I still think that find() is faster than children() in most cases.
I stepped through the jQuery code in Chrome Developer T...
Check if an element is present in an array [duplicate]
...Note that unless your application searches in lists extremely often (say a 1000 times per second) or the lists are huge (say 100k entries), the speed difference will not matter.
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How to convert an ArrayList containing Integers to primitive int array?
...s vs pure java and on small lists (<25 elements) pure java is more than 100 times faster. For 3k elements pure java is still almost 2 times faster... (ArrayList<Integer> --> int[])
– Oskar Lund
Apr 4 '13 at 16:26
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