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FixedThreadPool vs CachedThreadPool: the lesser of two evils
...ll time, and queue type.
public static ExecutorService newFixedThreadPool(int nThreads) {
return new ThreadPoolExecutor(nThreads, nThreads,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>());
}
public st...
MySQL stored procedure vs function, which would I use when?
...and then execute them). (Dynamic SQL in MySQL stored routines)
Some more interesting differences between FUNCTION and STORED PROCEDURE:
(This point is copied from a blogpost.)
Stored procedure is precompiled execution plan where as functions are not. Function Parsed and compiled at runtime. Stor...
How to get the input from the Tkinter Text Widget?
How to get Tkinter input from the Text widget?
7 Answers
7
...
Why are joins bad when considering scalability?
...mpared to not joining them, because it's work you need to do live at the point where the user requests it.
But remember the alternative is no longer having two separate pieces of data at all; you have to put the two disparate data points in the same record. You can't combine two different pieces of ...
Difference between a “coroutine” and a “thread”?
... is the difference?
Concurrency is the separation of tasks to provide interleaved
execution. Parallelism is the simultaneous execution of multiple
pieces of work in order to increase speed. —https://github.com/servo/servo/wiki/Design
Short answer: With threads, the operating system swit...
Evaluating a mathematical expression in a string
...ws how to parse basic arithmetic expressions. Below, I've rewrapped fourFn into a numeric parser class for easier reuse.
from __future__ import division
from pyparsing import (Literal, CaselessLiteral, Word, Combine, Group, Optional,
ZeroOrMore, Forward, nums, alphas, oneOf)...
地图组件（高德地图） · App Inventor 2 中文网
...The features parameter will be a list of
feature descriptions that can be converted into components using the
根据描述生成特征 method.
LoadError(url,responseCode,errorMessage)
The LoadError event is run when an error occurs while processing a feature collection
document at the given u...
glVertexAttribPointer clarification
...ust a Buffer.
Nothing gets saved back to the vertex array, glVertexAttribPointer works exactly like glVertexPointer or glTexCoordPointer work, just instead of named attributes, you get to provide a number that specifies your own attribute. You pass this value as index. All your glVertexAttribPointer...
Large-scale design in Haskell? [closed]
...The type system
Use the type system to enforce abstractions, simplifying interactions.
Enforce key invariants via types
(e.g. that certain values cannot escape some scope)
That certain code does no IO, does not touch the disk
Enforce safety: checked exceptions (Maybe/Either), avoid mixing conce...
Why is exception handling bad?
...ally throw, and handle that correctly. Doing so can be tricky and counter-intuitive.
Consider something like this as a simple example:
class Frobber
{
int m_NumberOfFrobs;
FrobManager m_FrobManager;
public:
void Frob()
{
m_NumberOfFrobs++;
m_FrobManager.HandleFro...