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扒了一下源码，ESP8285接入App Inventor有4种玩法，第3种最香 - AI 助手 - ...
...;
server.on("/led", HTTP_GET, []() {
int state = server.arg("state").toInt();
digitalWrite(LED_PIN, state);
server.send(200, "text/plain", "OK");
});
server.begin();
}
App ...
How to get function parameter names/values dynamically?
...pt length. For example, it does not have the pop method. However it can be converted to a real Array:
var args = Array.prototype.slice.call(arguments);
If Array generics are available, one can use the following instead:
var args = Array.slice(arguments);
...
Does JavaScript have “Short-circuit” evaluation?
...or in expr1 && expr2 is executed followingly:
If expr1 can be converted to true, returns expr2; else, returns expr1.
So this means, in our practical example, the const res is evaluated the following way:
Invoking expr1 - sanitise(0xFF)
0xFF is a valid hexadecimal number for 250, oth...
How can I get query string values in JavaScript?
.../This doesn't output anything, it just updates the $.QueryString object
//Convert object into string suitable for url a querystring (Requires jQuery)
$.param($.QueryString)
//This outputs something like...
//"param=newvalue&param2=val"
//Update the url/querystring in the browser's location bar...
How do I forward declare an inner class? [duplicate]
...not make sense in this context and is doubtful to be accurate. The whole point of a forward declaration is that you are telling the compiler that there is a class (or in this case, an inner class). That specific statement of yours would be just as true of normal classes and would mean you can't forw...
JUnit Testing Exceptions [duplicate]
...d = ArithmeticException.class)
public void divisionWithException() {
int i = 1/0;
}
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Volatile vs. Interlocked vs. lock
Let's say that a class has a public int counter field that is accessed by multiple threads. This int is only incremented or decremented.
...
Why does Date.parse give incorrect results?
...ay be an abbreviation and may be different in different implementations.
Converts from UTC to Local time before printing
- toString
- toDateString
- toTimeString
- toLocaleString
- toLocaleDateString
- toLocaleTimeString
Prints the stored UTC time directly
- toUTCString
- toISOString
...
Checking images for similarity with OpenCV
...ive error between images.
double errorL2 = norm( A, B, CV_L2 );
// Convert to a reasonable scale, since L2 error is summed across all pixels of the image.
double similarity = errorL2 / (double)( A.rows * A.cols );
return similarity;
}
else {
//Images have a different size
ret...
Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...how-to-set-up-raspberry-pi-without-a-monitor/54393#54393
UART serial USB converter
This is an alternative to SSH if you just want to get a shell on the Pi: https://en.wikipedia.org/wiki/Serial_port
This does not use SSH or networking itself, but rather the older, simpler, more direct, more relia...