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Why sizeof int is wrong, while sizeof(int) is right?
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From C99 Standard
6.5.3.4.2
The sizeof operator yields the size (in bytes) of its operand, which may be an expression or the parenthesized name of a
type.
In your case int is neither expression nor parenthesized nam...
Get all non-unique values (i.e.: duplicate/more than one occurrence) in an array
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This is my answer from the duplicate thread (!):
When writing this entry 2014 - all examples were for-loops or jQuery. Javascript has the perfect tools for this: sort, map and reduce.
Find duplicate items
var names = ['Mike', 'Matt', '...
When to use ko.utils.unwrapObservable?
...rote:
//replaces single and double 'smart' quotes users commonly paste in from word into textareas and textboxes with normal text equivalents
//USAGE:
//data-bind="replaceWordChars:true
//also works with valueUpdate:'keyup' if you want"
ko.bindingHandlers.replaceWordChars = {
update: function ...
knitr Markdown highlighting in Emacs?
...ter markdown.el. Besides, if all you want is to just switch the ESS engine from Sweave to knitr (without highlighting!), there is no need to go through all the complication of this article, just add (setq ess-swv-processor 'knitr) in you init file.
– antonio
De...
C#: Abstract classes need to implement interfaces?
...'s mixins is another example. It allows you to mix partial implementations from many abstract classes into a single interface. Each abstract class only needs to implement the method it does want to implement. No dumb abstract method boilerplate getting in the way as is the case if i'm to recreate th...
Contains case insensitive
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From ES2016 you can also use slightly better / easier / more elegant method (case-sensitive):
if (referrer.includes("Ral")) { ... }
or (case-insensitive):
if (referrer.toLowerCase().includes(someString.toLowerCase())) { ....
Django class-based view: How do I pass additional parameters to the as_view method?
... to create it as an instance variable in your sub-class:
# myapp/views.py
from django.views.generic import DetailView
class MyView(DetailView):
template_name = 'detail.html'
model = MyModel
# additional parameters
slug = None
def get_object(self, queryset=None):
return...
iPhone: Detecting user inactivity/idle time since last screen touch
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Hi Mike, My AppDelegate is inherting from NSObject So changed it UIApplication and Implement above methods to detect user becoming idle but i am getting error "Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'There can only ...
Convert a row of a data frame to vector
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When you extract a single row from a data frame you get a one-row data frame. Convert it to a numeric vector:
as.numeric(df[1,])
As @Roland suggests, unlist(df[1,]) will convert the one-row data frame to a numeric vector without dropping the names...
Better way of getting time in milliseconds in javascript?
... Worth noting that performance.now() gives monotonic time, unlike the time from Date. It means that every subsequent call is guaranteed to return a value not less than the previous one.
– user
Feb 23 '17 at 11:15
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