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Is there a performance gain in using single quotes vs double quotes in ruby?
...0
Benchmark.bm(15) do |x|
x.report("assign single") { n.times do; c = 'a string'; end}
x.report("assign double") { n.times do; c = "a string"; end}
x.report("concat single") { n.times do; 'a string ' + 'b string'; end}
x.report("concat double") { n.times do; "a string " + "b string"; end}
en...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
...g on the set of features you require of Twisted, the (relatively painless) extra complexity of mixing Gevent and Twisted might not be worth the trouble.)
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How can I do test setup using the testing package in Go
...func TestAddition(t *testing.T) {
cases := []struct {
name string
a int
b int
expected int
}{
{"add", 2, 2, 4},
{"minus", 0, -2, -2},
{"zero", 0, 0, 0},
}
teardownTestCase := setupTestCase(t)
defer teardow...
Regex (grep) for multi-line search needed [duplicate]
...iods) and blanks, but also quotes and anything that can be inside a quoted string.
I would likely go with a Perl-based solution, having Perl read 'paragraphs' at a time and applying a regex to that. The downside is having to deal with the recursive search - there are modules to do that, of course,...
How to print a number with commas as thousands separators in JavaScript
...urpose. Here is what I did:
function numberWithCommas(x) {
return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}
function numberWithCommas(x) {
return x.toString().replace(/\B(?<!\.\d*)(?=(\d{3})+(?!\d))/g, ",");
}
function test(x, expect) {
const result = numberWi...
In Scala how do I remove duplicates from a list?
...ok at the ScalaDoc for Seq,
scala> dirty.distinct
res0: List[java.lang.String] = List(a, b, c)
Update. Others have suggested using Set rather than List. That's fine, but be aware that by default, the Set interface doesn't preserve element order. You may want to use a Set implementation that ex...
Remove duplicate elements from array in Ruby
...
array = array.uniq
uniq removes all duplicate elements and retains all unique elements in the array.
This is one of many beauties of the Ruby language.
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Django Rest Framework: Dynamically return subset of fields
...verride the serializer __init__ method and set the fields attribute dynamically, based on the query params. You can access the request object throughout the context, passed to the serializer.
Here is a copy&paste from Django Rest Framework documentation example on the matter:
from rest_framew...
Html5 data-* with asp.net mvc TextboxFor html attributes
...tBoxFor(
model => model.Country.CountryName,
new Dictionary<string, object> {
{ "data-url", Url.Action("CountryContains", "Geo") }
}
) %>
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Multi-line commands in GHCi
...ust not be trailing spaces on your lines. trailing whitespace counts as an extra Enter and breaks the multi-line block.
– Will Ness
May 12 at 6:16
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