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How to pretty print nested dictionaries?
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KenKen
6,64322 gold badges1313 silver badges1414 bronze badges
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Efficiently test if a port is open on Linux?
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The -z flag is not available in the nmap based ncat which most recent distros ship with: Fedora, Centos, etc. (nmap-ncat-6.01-9.fc18.x86_64)
– Zack
Dec 20 '15 at 14:13
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Windows threading: _beginthread vs _beginthreadex vs CreateThread C++
...on correctly. See for more info: support.microsoft.com/default.aspx/kb/104641
– John Dibling
Apr 22 '09 at 15:40
1
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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...plogSize 可以通过–oplogSize设置大小，对于linux 和windows 64位，oplog size默认为剩余磁盘空间的5%。
同步也并非只能从主节点同步，假设集群中3个节点，节点1是主节点在IDC1，节点2、节点3在IDC2，初始化节点2、节点3会从节点1同...
How do you post to an iframe?
...1-strict.dtd">
<html>
<head>
<title>Form Iframe Demo</title>
</head>
<body>
<form action="do_stuff.asp" method="post" target="my_frame">
<input type="text" name="someText" value="Some Text">
<input type="submit">
</for...
How to customize a Spinner in Android
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I have build a small demo project on this you could have a look to it
Link to project
Passing references to pointers in C++
...id BinTree::safe_tree(BinTree * &vertex ) {
if ( vertex!=0 ) { // base case
safe_tree(vertex->left); // left subtree.
safe_tree(vertex->right); // right subtree.
// delete vertex; // using this delete causes an error, since they were deleted on the...
Maximum number of threads in a .NET app?
...s to 1000. A limit of 1000 is effectively no limit at all."
Note this is based on .NET 2.0. This may have changed in .NET 3.5.
[Edit] As @Mitch pointed out, this is specific to the CLR ThreadPool. If you're creating threads directly see the @Mitch and others comments.
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CSS3 Transparency + Gradient
...ottom) for the same color:
background: linear-gradient(to bottom, rgba(0, 64, 122, 1) 0%,rgba(0, 64, 122, 0.8) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
background: -o-linear-gradient(top, rgba(0, 64, 122, 1) 0%, rgba(0, 64, 122, 0.8) 100%); /* Opera 11.10+ */
background: -moz-l...
Why does Python use 'magic methods'?
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64
AFAIK, len is special in this respect and has historical roots.
Here's a quote from the FAQ:
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