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How to install PyQt4 on Windows using pip?
...ce.
Make sure you grab the correct Windows wheel file (python version, 32/64 bit), and then use pip to install it - e.g:
C:\path\where\wheel\is\> pip install PyQt4-4.11.4-cp35-none-win_amd64.whl
Should properly install if you are running an x64 build of Python 3.5.
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Get image data url in JavaScript?
...ust regular <img /> HTML tags). I'd like to get their content, base64 encoded preferably, without the need to redownload the image (ie. it's already loaded by the browser, so now I want the content).
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Is this object-lifetime-extending-closure a C# compiler bug?
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Eric LippertEric Lippert
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CentOS 64 bit bad ELF interpreter
I have just installed CentOS 6 64bit version, I'm trying to install a 32-bit application on a 64-bit machine and got this error:
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Decoding and verifying JWT token using System.IdentityModel.Tokens.Jwt
... tokens.
The class has a ReadToken(String) method that will take your base64 encoded JWT string and returns a SecurityToken which represents the JWT.
The SecurityTokenHandler also has a ValidateToken(SecurityToken) method which takes your SecurityToken and creates a ReadOnlyCollection<ClaimsIde...
Add new column with foreign key constraint in one command
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PostgreSQL DLL to add an FK column:
ALTER TABLE one
ADD two_id INTEGER REFERENCES two;
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What is the difference between an int and a long in C++?
...der Windows they are the same, but for example on Alpha systems a long was 64 bits whereas an int was 32 bits. This article covers the rules for the Intel C++ compiler on variable platforms. To summarize:
OS arch size
Windows IA-32 4 bytes
Windows Intel 64...
How long is the SHA256 hash?
...each character (instead of 8, like for ASCII), so 256 bits would represent 64 hex characters, therefore you need a varchar(64), or even a char(64), as the length is always the same, not varying at all.
And the demo :
$hash = hash('sha256', 'hello, world!');
var_dump($hash);
Will give you :
$ ph...
How to convert byte array to string and vice versa?
...ly must use a String to hold binary data then the safest way is to use Base64 encoding.
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...ahoMqttClient1.ClientKeyFile to "client.key"
call connectToBroker
// 动态密码更新
when Button_UpdateCredentials.Click
do
set NewUsername to TextBox_Username.Text
set NewPassword to TextBox_Password.Text
if NewUsername = "" or NewPassword = "" then
show notification "...