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Force DOM redraw/refresh on Chrome/Mac
...tyle
element.appendChild(n);
element.style.display = 'none';
setTimeout(function(){
element.style.display = disp;
n.parentNode.removeChild(n);
},20); // you can play with this timeout to make it as short as possible
}
EDIT: In response to Šime Vidas what we are a...
How to implement the activity stream in a social network
...at you can quickly grab a batch of activities by activity ID or by using a set of friend IDs with time constraints.
Publish the activity IDs to Redis whenever an activity record is created, adding the ID to an "activity stream" list for every user who is a friend/subscriber that should see the activ...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...QuickSort)，归并排序(MergeSort)，堆排序(HeapSort)，插入排序(InsertSort)，希尔排序(ShellSort) 1、选择排序(SelectSort)
/************************************
* 简单选择排序
* 稳定排序，O{n^2} ~ O{n^2}
* 从首位开始，循环一次找出一个比首位小...
How to send SMS in Java
...M Modem and Java Communications Api [Tried And Tested]
First You Need TO Set Java Comm Api
This Article Describes In Detail How to Set Up Communication Api
Next You Need A GSM Modem (preferably sim900 Module )
Java JDK latest version preferable
AT Command Guide
Code
package sample;
imp...
Is there a “goto” statement in bash?
...
set -x helps understand what's going on
– John Lin
Aug 22 '18 at 1:30
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What are some uses of decltype(auto)?
...lay the return type deduction after the dust of template instantiation has settled.
Other uses
You can also use decltype(auto) in other contexts, e.g. the draft Standard N3936 also states
7.1.6.4 auto specifier [dcl.spec.auto]
1 The auto and decltype(auto) type-specifiers designate a placeh...
Left-pad printf with spaces
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
sed error: “invalid reference \1 on `s' command's RHS”
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
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else {
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...
UIImage: Resize, then Crop
...de - it's part of a categeory on UIImage. Target size in my code is always set to the full screen size of the device.
@implementation UIImage (Extras)
#pragma mark -
#pragma mark Scale and crop image
- (UIImage*)imageByScalingAndCroppingForSize:(CGSize)targetSize
{
UIImage *sourceImage = self...
grep a file, but show several surrounding lines?
...
For BSD or GNU grep you can use -B num to set how many lines before the match and -A num for the number of lines after the match.
grep -B 3 -A 2 foo README.txt
If you want the same number of lines before and after you can use -C num.
grep -C 3 foo README.txt
Th...