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Differences between socket.io and websockets
...ws = require('express-ws')(app);
app.get('/', (req, res) => {
console.error('express connection');
res.sendFile(path.join(__dirname, 'ws.html'));
});
app.ws('/', (s, req) => {
console.error('websocket connection');
for (var t = 0; t < 3; t++)
setTimeout(() => s.send('message ...
Colors in JavaScript console
...\Custom.css if you are in WinXP, but the directory varies by OS.
.console-error-level .console-message-text{
color: red;
}
.console-warning-level .console-message-text {
color: orange;
}
.console-log-level .console-message-text {
color:green;
}
...
淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...行记录操作的并发度，同时也能控制单个商品占用数据库连接的数量，防止热点商品占用太多数据库连接。
数据库层做排队。应用层只能做到单机排队，但应用机器数本身很多，这种排队方式控制并发仍然有限，所以如果能...
Conditions for automatic generation of default/copy/move ctor and copy/move assignment operator?
...links in this forum. But it's also good article - cplusplus.com/articles/y8hv0pDG
– bruziuz
Oct 12 '16 at 0:54
Note, t...
How to parse a string to an int in C++?
...++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero ).
...
try/catch + using, right syntax
...
I prefer the second one. May as well trap errors relating to the creation of the object as well.
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Python add item to the tuple
...2',) but when I try to add new one using mytuple = mytuple + new.id got error can only concatenate tuple (not "unicode") to tuple .
...
Convert Long into Integer
...
I am getting the error: Cannot invoke intValue() on the primitive type long
– Anand
Jul 22 '16 at 8:29
1
...
How do I parse command line arguments in Bash?
...er positional arguments (also requested by the OP); and it ignores parsing-errors. Instead:
Use enhanced getopt from util-linux or formerly GNU glibc.1
It works with getopt_long() the C function of GNU glibc.
Has all useful distinguishing features (the others don’t have them):
handles spaces, ...
Append a NumPy array to a NumPy array
...
Well, the error message says it all: NumPy arrays do not have an append() method. There's a free function numpy.append() however:
numpy.append(M, a)
This will create a new array instead of mutating M in place. Note that using num...