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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 "...
Android Studio installation on Windows 7 fails, no JDK found
...
+1 This MOSTLY worked for me. I am running 64 bit windows and JDK 1.7.0. I tried adding both JDK_HOME and JAVA_HOME with "c:\Program Files\Java\jdk1.7.0\". It still would not load. However, I capitalized the "C" and removed the trailing slash and it works now: "C:\Pr...
Openssl is not recognized as an internal or external command
...bin\openssl.exe" sha1 -binary | "C:\Users\abc\openssl\bin\openssl.exe" base64
Remember, path that you will enter will be the path where you have installed the openssl...hope this helps..:-)
Edit:
you can download openssl for windows 32 and 64 bit from the respective links below:
OpenSSL for 64 Bits...
CDC:DrawText 多行显示文本（文本自动换行） - C/C++ - 清泛网 - 专注C/C++及内核技术
...都不能折行。
DT_TABSTOP：设置制表，参数uFormat的15"C8位（低位字中的高位字节）指定每个制表符的字符数，每个制表符的缺省字符数是8。
DT_TOP：正文顶端对齐（仅对单行）。DT_VCENTER：正文水平居中（仅对单行）。
...
JavaScript % (modulo) gives a negative result for negative numbers
According to Google Calculator (-13) % 64 is 51 .
11 Answers
11
...
Ternary operator is twice as slow as an if-else block?
...er this question, we'll examine the assembly code produced by the X86 and X64 JITs for each of these cases.
X86, if/then
32: foreach (int i in array)
0000007c 33 D2 xor edx,edx
0000007e 83 7E 04 00 cmp dword ptr [esi+4],0
00000082 7E 1C...
Drawing an SVG file on a HTML5 canvas
...on to comment on the @Matyas answer, but if the svg's image is also in base64, it will be drawed to the output.
Demo:
var svg = document.querySelector('svg');
var img = document.querySelector('img');
var canvas = document.querySelector('canvas');
// get svg data
var xml = new XMLSerializ...
Convert pandas timezone-aware DateTimeIndex to naive timestamp, but in certain timezone
...2:00', '2013-05-18 13:00:00+02:00'],
dtype='datetime64[ns, Europe/Brussels]', freq='H')
using tz_localize(None) removes the timezone information resulting in naive local time:
In [6]: t.tz_localize(None)
Out[6]: DatetimeIndex(['2013-05-18 12:00:00', '2013-05-18 13:00:00'], ...
How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor? [duplicate]
..._WIN32__) || defined(__NT__)
//define something for Windows (32-bit and 64-bit, this part is common)
#ifdef _WIN64
//define something for Windows (64-bit only)
#else
//define something for Windows (32-bit only)
#endif
#elif __APPLE__
#include <TargetConditionals.h>
...
Adding header for HttpURLConnection
...ntials = "username:password";
String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userCredentials.getBytes()));
myURLConnection.setRequestProperty ("Authorization", basicAuth);
myURLConnection.setRequestMethod("POST");
myURLConnection.setRequestProperty("Content-Type", "application/...