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Fastest way to copy file in node.js
...this adds error handling:
function copyFile(source, target, cb) {
var cbCalled = false;
var rd = fs.createReadStream(source);
rd.on("error", function(err) {
done(err);
});
var wr = fs.createWriteStream(target);
wr.on("error", function(err) {
done(err);
});
wr.on("close", fu...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...表为例；
对于访问数据库客户端来讲，需要根据用户的ID，定位到需要访问的数据；
数据切分算法，
根据用户的ID做hash操作，一致性Hash，这种方式存在失效数据的迁移问题，迁移时间内服务不可用
维护路由表，路由表中存...
Should URL be case sensitive?
...
There may be URLs, or parts of URLs, where case doesn't matter, but
identifying these may not be easy. Users should always consider that
URLs are case-sensitive.
share
|
improve this answe...
logger configuration to log to file and print to stdout
...ed in this function.
The whole setup can therefore be done with a single call like this:
import logging
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s [%(levelname)s] %(message)s",
handlers=[
logging.FileHandler("debug.log"),
logging.StreamHandler()
...
How to convert an int to string in C?
...rst you need to find out sufficient size. snprintf tells you length if you call it with NULL, 0 as first parameters:
snprintf( NULL, 0, "%d", x );
Allocate one character more for null-terminator.
#include <stdio.h>
#include <stdlib.h>
int x = -42;
int length = snprintf( NULL, 0, "%...
Understanding Node.js modules: multiple requires return the same object?
...eive the same instance of A. From the node.js documentation:
... every call to require('foo') will get exactly the same object returned, if it would resolve to the same file.
The situation is different when a.js, b.js and app.js are in different npm modules. For example:
[APP] --> [A], ...
Python vs Cpython
...lementation. It is the implementation you download from Python.org. People call it CPython to distinguish it from other, later, Python implementations, and to distinguish the implementation of the language engine from the Python programming language itself.
The latter part is where your confusion co...
How does this program work?
...ng arguments.
and from 6.5.2.2/6,
If the expression that denotes the called function has a type that does not include a prototype, the integer promotions are performed on each argument, and arguments that have type float are promoted to double. These are called the default argument promotions....
How to decode HTML entities using jQuery?
...
@MichaelStum your edit here invalidated both Mike Samuel's comment and the next-highest-voted answer, and did so without actually fixing the XSS vulnerability for all jQuery versions (as explained in the answer below). Adding a security warning to this answe...
How to clear the interpreter console?
Like most Python developers, I typically keep a console window open with the Python interpreter running to test commands, dir() stuff, help() stuff , etc.
...