大约有 23,000 项符合查询结果（耗时：0.0215秒） [XML]
重构理论及实践——用工厂模式重构c++后台代码 - C/C++ - 清泛网 - 专注C/C...
...到本例，从可维护性的角度，消息cmd和processor factory是硬编码耦合的，当前情况下没什么问题，但脑洞开一点，业务规模增加到足够大时，框架和消息可能由两拨人来维护，此时是不是用注册回调的观察者模式，可以使业务的人...
What's the difference between a single precision and double precision floating point operation?
...antissa will always be in the form
0.α1α2...αt × βp
where β is the base of representation. But since the fraction is a binary number, α1 will always be equal to 1, thus the fraction can be rewritten as 1.α2α3...αt+1 × 2p and the initial 1 can be implicitly assumed, making room for an ex...
ASP.NET MVC on IIS 7.5
...
This was my problem too. I never would have guessed based on the 403 symptom that my application was missing the Global.asax
– Saul Dolgin
Jun 28 '13 at 13:09
...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
How to JSON serialize sets?
...de disappeared
updated the call to the parents' default with super()
using base64 to serialize the bytes type into str (because it seems that bytes in python 3 can't be converted to JSON)
from decimal import Decimal
from base64 import b64encode, b64decode
from json import dumps, loads, JSONEncoder...
convert UIImage to NSData
...{
UIImage *snapshot = self.myImageView.image;
[self encodeImageToBase64String:snapshot];
}
call this method for image convert in base 64
-(NSString *)encodeImageToBase64String:(UIImage *)image
{
return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:N...
Position icons into circle
...e ON the circle */
- let tan = Math.tan(Math.PI/m); /* tangent of half the base angle */
.container(style=`--m: ${m}; --tan: ${+tan.toFixed(2)}`)
- for(let i = 0; i < n_imgs; i++)
a(href='#' style=i - has_mid >= 0 ? `--i: ${i}` : null)
img(src=imgs[i].src alt=imgs[i].alt...
Smallest data URI image possible for a transparent image
...ds (in some browsers).
Shorter (but unstable - 74 bytes)
data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
I would advise using the slightly longer and more stable version as follows:
⇊ Stable ⇊ (but slightly longer - 78 bytes)
data:image/gif;base64,R0lGODlhAQABAI...
I need to securely store a username and password in Python, what are my options?
...s
from pbkdf2 import PBKDF2
from Crypto.Cipher import AES
import os
import base64
import pickle
### Settings ###
saltSeed = 'mkhgts465wef4fwtdd' # MAKE THIS YOUR OWN RANDOM STRING
PASSPHRASE_FILE = './secret.p'
SECRETSDB_FILE = './secrets'
PASSPHRASE_SIZE = 64 # 512-bit passphrase
KEY_SIZE = 32 ...
How to set custom favicon in Express?
... improve performance by skipping disk access.
This module provides an ETag based on the contents of the icon, rather than file system properties.
This module will serve with the most compatible Content-Type.
share
...