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How to detect when cancel is clicked on file input?
...entListener("focus",fn,{once: true}). However I couldn't get it to fire at all using document.body.addEventListener.. I don't know why. Instead I got the same result with window.addEventListener.
– WoodenKitty
Aug 13 '16 at 2:21
...
What is thread contention?
... running.
Why? Say each thread is running on its own core on a modern x86 CPU and the cores don't share an L2 cache. With just one thread, the object may remain in the L2 cache most of the time. With both threads running, each time one thread modifies the object, the other thread will find the data...
Advantages to Using Private Static Methods
When creating a class that has internal private methods, usually to reduce code duplication, that don't require the use of any instance fields, are there performance or memory advantages to declaring the method as static?
...
List directory in Go
... of everything in the current directory (folders are included but not specially marked - you can check if an item is a folder by using the IsDir() method):
package main
import (
"fmt"
"io/ioutil"
"log"
)
func main() {
files, err := ioutil.ReadDir("./")
if err != nil {
...
How to check if a file is a valid image file?
...
That won't be sufficient if he's really testing for "valid" images; the presence of a magic number doesn't guarantee that the file hasn't been truncated, for example.
– Ben Blank
May 20 '09 at 18:11
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Why does pthread_cond_wait have spurious wakeups?
...sor systems, making condition wakeup completely predictable might substantially slow all condition variable operations.
In the following comp.programming.threads discussion, he expands on the thinking behind the design:
Patrick Doyle wrote:
> In article , Tom Payne wrote:
> >Kaz Kyl...
endsWith in JavaScript
...
UPDATE (Nov 24th, 2015):
This answer is originally posted in the year 2010 (SIX years back.) so please take note of these insightful comments:
Shauna - Update for Googlers - Looks like ECMA6 adds this function. The MDN article also shows a polyfill. https://developer.m...
Check if element exists in jQuery [duplicate]
... are used therefore "#elementId" selects by element. "elementId" would actually select all emenets whose tags are named "elementId"
– Petr Gladkikh
Dec 13 '12 at 7:13
8
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为何谷歌不可复制？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...可使用并从中受益，那么糟糕的广告(即信息)就自然是个问题了。因此，即使牺牲周末时间，他们也决定解决这个问题。”
谷歌之所以成为后德鲁克时代最具代表性的公司，除了两位创始人的学院派的作风外，谷歌公司也延续...
Best way to serialize an NSData into a hexadeximal string
...e Gallagher's answer is sufficient for a relatively small size, memory and cpu performance deteriorate for large amounts of data. I profiled this with a 2MB file on my iPhone 5. Time comparison was 0.05 vs 12 seconds. Memory footprint is negligible with this method while the other method grew the he...