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MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...查看集群状态,可以看到192.168.1.3已经作为Master运行
5 节点类型
MongoDB的节点类型有主节点(Master)，副本节点(Slave或者称为Secondary)，仲裁节点，Secondary-Only节点，Hidden节点，Delayed节点和Non-Voting节点。
仲裁节点不存储数据，...
Generate a random alphanumeric string in Cocoa
...ring *letters = @"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-(NSString *) randomStringWithLength: (int) len {
NSMutableString *randomString = [NSMutableString stringWithCapacity: len];
for (int i=0; i<len; i++) {
[randomString appendFormat: @"%C", [lette...
How to align a to the middle (horizontally/width) of the page [duplicate]
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1125
<body>
<div style="width:800px; margin:0 auto;">
centered content
&l...
How to implode array with key and value without foreach in PHP
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community wiki
5 revs, 3 users 47%robsch
7
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Selector on background color of TextView
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5 Answers
5
Active
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Check if character is number?
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GregLGregL
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1
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pythonic way to do something N times without an index variable?
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15
@Hamish: My test with 2.6 says 32% faster (23.2 us vs 17.6 us for N=1000). But that is a really time time anyways. I would default to the OP...
How to use cURL to get jSON data and decode the data?
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Shiny
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answered May 22 '13 at 20:47
Wesley Schleumer d...
Replace multiple characters in one replace call
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525
Use the OR operator (|):
var str = '#this #is__ __#a test###__';
str.replace(/#|_/g,''); // r...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...e loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
10 Answers
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