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【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... = 10px，所以 box 盒子的宽高分别为：100px 和 200px;
当我们把 html 中 font-size: 20px; 时，此时 1rem = 20px,此时 box 盒子的宽高就为 200px 和 400px;
2、实际开发中如何适配，如何将设计稿对应的 px 单位转换为 rem 单位
在实际的开发中...
How to upload a file to directory in S3 bucket using boto
...on.get_bucket('your bucket name')
key = boto.s3.key.Key(bucket, 'some_file.zip')
with open('some_file.zip') as f:
key.send_file(f)
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Reading ePub format
...hich is an XML file)
one to define how everything is packaged up (OEBPS: a zip file of everything in the manifest plus a few extra files)
The specs look a bit daunting but actually once you've got the basics (unzipping, parsing XML) down it's not particularly difficult or complex.
You'll need to ...
栈和队列的面试题Java实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...素，栈2用于弹出元素，负负得正。
说的通俗一点，现在把数据1、2、3分别入栈一，然后从栈一中出来（3、2、1），放到栈二中，那么，从栈二中出来的数据（1、2、3）就符合队列的规律了，即负负得正。
完整版代码实现：
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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
记一次MongoDB性能问题最近忙着把一个项目从MySQL迁移到MongoDB，在导入旧数据的过程中，遇到了些许波折，犯了不少错误，但同时也学到了不少知识，遂记录下来。公...最近忙着把一个项目从MySQL迁移到MongoDB，在导入旧数据的过...
When should the xlsm or xlsb formats be used?
...
They're all similar in that they're essentially zip files containing the actual file components. You can see the contents just by replacing the extension with .zip and opening them up. The difference with xlsb seems to be that the components are not XML-based but are in ...
python pandas dataframe to dictionary
...
mydict = dict(zip(df.id, df.value))
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How to run a process with a timeout in Bash? [duplicate]
...ld be missing from anything that is FreeBSD, NetBSD, OS X, HP/UX, Solaris, AIX, etc.
– Graham
Apr 19 '12 at 22:32
3
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How to preserve insertion order in HashMap? [duplicate]
...tee that the order will remain constant over time.
Perhaps you can do as aix suggests and use a LinkedHashMap, or another ordered collection. This link can help you find the most appropriate collection to use.
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Detecting Windows or Linux? [duplicate]
...{
return (OS.contains("nix") || OS.contains("nux") || OS.contains("aix"));
}
public static boolean isSolaris() {
return OS.contains("sunos");
}
public static String getOS(){
if (isWindows()) {
return "win";
} else if (isMac()) {
...