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Why is std::map implemented as a red-black tree?
...dy O(log n). even after all the slightly extra work that AVL trees do results in a more tightly balanced tree which leads to slightly faster lookups. so it is a perfectly valid tradeoff and does not make AVL trees inferior to red-black trees.
– necromancer
Mar...
Responding with a JSON object in Node.js (converting object/array to JSON string)
...require('http');
const url = require('url');
http.createServer((req,res)=>{
const parseObj = url.parse(req.url,true);
const users = [{id:1,name:'soura'},{id:2,name:'soumya'}]
if(parseObj.pathname == '/user-details' && req.method == "GET") {
let Id = parseObj.query....
Conda: Installing / upgrading directly from github
...now do:
name: sample_env
channels:
dependencies:
- requests
- bokeh>=0.10.0
- pip:
- "--editable=git+https://github.com/pythonforfacebook/facebook-sdk.git@8c0d34291aaafec00e02eaa71cc2a242790a0fcc#egg=facebook_sdk-master"
It's still calling pip under the covers, but you can now un...
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari?
...window).scrollTop(10);
var keyboard_shown = $(window).scrollTop() > 0;
$(window).scrollTop(0);
$('#test').append(keyboard_shown?'keyboard ':'nokeyboard ');
});
});
Normally, you would expect this to not be visible to the user. Unfortunately, at least when running in...
Backporting Python 3 open(encoding=“utf-8”) to Python 2
...
This may do the trick:
import sys
if sys.version_info[0] > 2:
# py3k
pass
else:
# py2
import codecs
import warnings
def open(file, mode='r', buffering=-1, encoding=None,
errors=None, newline=None, closefd=True, opener=None):
if newline...
How can I know when an EditText loses focus?
...
Kotlin way
editText.setOnFocusChangeListener { _, hasFocus ->
if (!hasFocus) { }
}
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IntelliJ: Viewing diff of all changed files between local and a git commit/branch
... open file with another branch in a side-by-side fashion, just go to VCS -> Git -> Compare with Branch.
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Difference between path.normalize and path.resolve in Node.js
.... Example (my current working directory was /Users/mtilley/src/testing):
> path.normalize('../../src/../src/node')
'../../src/node'
> path.resolve('../../src/../src/node')
'/Users/mtilley/src/node'
In other words, path.normalize is "What is the shortest path I can take that will take me to ...
How do I control how Emacs makes backup files?
...cs had deleted the auto-save file.
Auto-save is nowadays disabled by default because it can slow down editing when connected to a slow machine, and because many files contain sensitive data.
Configuration
Here is a configuration that IMHO works best:
(defvar --backup-directory (concat user-emacs...
What is the purpose of the “final” keyword in C++11 for functions?
...A { void foo(); };
struct B : public A { void foo(); };
A * a = new B;
a -> foo(); // this will call A :: foo anyway, regardless of whether there is a B::foo
a->foo() will always call A::foo.
But, if A::foo was virtual, then B::foo would override it. This might be undesirable, and hence it ...