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Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...om if you have MySQL8+, you can run both the query in a single query using Window functions; but this won't be an optimal solution as indexes won't be used properly. Another option is to surround these two queries with LOCK TABLES <tablename> and UNLOCK TABLES. Third option and (best IMHO) is ...
How do I debug error ECONNRESET in Node.js?
...tempt to FTP to this server. I'm using FTP and port 21 only because I'm on Windows and have an FTP client, but no telnet client handy.
Then from the client side, just break the connection. (I'm just doing Ctrl-C)
You should see NO ERROR when using Node v0.9.9, and ERROR when using Node v.0.9.10 a...
What is the use of the JavaScript 'bind' method?
...se see the simple example below:
var x = 9; // this refers to global "window" object here in the browser
var person = {
x: 81,
getX: function() {
return this.x;
}
};
var y = person.getX; // It will return 9, because it will call global value of x(var x=9).
var x2 = y.bind(...
Display milliseconds in Excel
...anted to share it in case others also experience the same problem: If your Windows/Excel is configured for Germany, the . has to be replaced with ,, just like for the decimal places in numbers. Otherwise Excel will complain that it is not a valid format. So, it has to be [h]:mm:ss,000
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Twitter bootstrap 3 two columns full height
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If you resize the window it would not be fit properly on screen.
– Sadegh
Aug 14 '14 at 5:51
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How do you use gcc to generate assembly code in Intel syntax?
... CPP file:
#include <conio.h>
#include <stdio.h>
#include <windows.h>
int a = 0;
int main(int argc, char *argv[]) {
asm("mov eax, 0xFF");
asm("mov _a, eax");
printf("Result of a = %d\n", a);
getch();
return 0;
};
That's code worked with this GCC command lin...
ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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在接受调试信息的电脑上使用类似PUTTY的终端程序或者是windows自带的超级终端，将设置修改为以115200的波特率监听第一个串口（COM1[3F8/IRQ4]）。然后，在测试电脑上运行ros，你就可以接收到调试信息了。如果接收不到，请检查硬...
Generating random whole numbers in JavaScript in a specific range?
...elated to security. Use the Web
Crypto API instead, and more precisely the
window.crypto.getRandomValues() method.
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Copy array by value
... getting error in console for your given example "TypeError: window.addEvent is not a function"
– Ravi Sharma
Dec 31 '19 at 5:42
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What is Haskell used for in the real world? [closed]
...
One example of Haskell in action is xmonad, a "featureful window manager in less than 1200 lines of code".
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