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demystify Flask app.secret_key
...case, Python has some modules to help you get started :) here's a starting block:
import hmac
import hashlib
def create_signature(secret_key, msg, digestmod=None):
if digestmod is None:
digestmod = hashlib.sha1
mac = hmac.new(secret_key, msg=msg, digestmod=digestmod)
return mac...
Encrypt and decrypt a string in C#?
...l confusion: AES is a subset of Rijndael. If you use Rijndael with 128 bit blocks and either 128, 192 or 256 bit keys you're using AES.
– CodesInChaos
Aug 14 '13 at 15:50
3
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For-each over an array in JavaScript
...clearer to read.
It indicates that i is not going to be shifted within the block (which is always a possible surprise hiding in long for and while loops).
It gives you a free scope for closures.
It reduces leakage of local variables and accidental collision with (and mutation of) outer variables.
...
How to find list of possible words from a letter matrix [Boggle Solver]
... 7248252 0
free| 973159 65854762
Histogram for block sizes:
0-15 392633 36% ==================================================
16-31 43530 4% =====
32-47 50048 4% ======
48-63 70701 6% =========
64-79 18831 1% ==
...
Append an object to a list in R in amortized constant time, O(1)?
...r his answer, as I am new to R and it was nice to have a fully-constructed block of code for doing a performance analysis of the various solutions presented on this page. I am borrowing his code for my analysis, which I duplicate (wrapped in a function) below:
library(microbenchmark)
### Using envi...
How do I use arrays in C++?
... |
+---+
Note that the array itself is still allocated as a single block in memory.
Arrays of pointers
You can overcome the restriction of fixed width by introducing another level of indirection.
Named arrays of pointers
Here is a named array of five pointers which are initialized with a...
When to use volatile with multi threading?
...ing access to cache in the other core).
A memory barrier instruction just blocks the current thread's loads and/or stores until the store buffer drains; that always happens as fast as possible on its own. (Does a memory barrier ensure that the cache coherence has been completed? addresses this mis...
多媒体组件 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
How to run a program without an operating system?
... bootloader so it's self-contained, if the firmware will only load a small block of code.
Many ARM boards let you do some of those things. Some have boot loaders to help you with basic setup.
Here you may find a great tutorial on how to do a basic operating system on a Raspberry Pi.
Edit:
This ar...
AI2 Keep Awake
...tem. A Notification notification and NotificationChanel for this block is generated by the extension. This is determined by the properties ChannelName, ChannelDescription, NotificationTitle, NotificationText and NotificationIcon. See also section Notification / Notification Chan...