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Why does the C++ map type argument require an empty constructor when using []?
...place in C++11 as a terse alternative to insert.
– prideout
Nov 18 '14 at 19:32
3
Why is that std...
Why does Hibernate require no argument constructor?
... constructor to be able to instantiate the object. For most use cases, providing a no-arg constructor is not a problem.
There are hacks based on serialization that can work around not having a no-arg constructor, since serialization uses jvm magic to create objects without invoking the constructor....
When should I use @classmethod and when def method(self)?
... you realize that the definition of the method will not be changed or overriden.
An additional : teorically, class methods are faster then object methods, because don't need to be instantiated and need less memory.
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datetime dtypes in pandas read_csv
...
Aside from the fact that this doesn't have the desired effect, it also doesn't work: AttributeError: type object 'datetime.datetime' has no attribute 'datetime'
– Gabriel
Dec 1 '16 at 9:29...
Html code as IFRAME source rather than a URL
...chnique would look something like this:
var iframe = document.getElementById('foo'),
iframedoc = iframe.contentDocument || iframe.contentWindow.document;
iframedoc.body.innerHTML = 'Hello world';
Example
Edit 2 (December 2017): use the Html5's srcdoc attribute, just like in Saurabh Chandr...
Open Graph namespace declaration: HTML with XMLNS or head prefix?
... Nothing will break right now, but relying on defaults is rarely a good idea when you can be explicit. If 2 years down the road we change the defaults, your site will break. Also, if you declare your namespaces directly it will help other parsers not just Facebook.
– Paul Ta...
Why can I create a class named “var”?
...it is a contextual keyword, so from the context the compiler is able to decide which is your class and which is the contextual keyword, and no confusion arises.
a contextual keyword is:
used to provide a specific meaning in the code, but it is not a
reserved word in C#.
so as its not reserv...
Applying function with multiple arguments to create a new pandas column
...rror. In that case, the @RomanPekar solution works without any problem. I didn't compare the performance.
– Ehsan Sadr
Feb 15 '19 at 1:55
...
Operation on every pair of element in a list
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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Serving gzipped CSS and JavaScript from Amazon CloudFront via S3
...u make a change to a file that is cached in CloudFront, make sure you invalidate the cache after making this type of change.
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