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What is the difference between async.waterfall and async.series
The nodejs async module: https://github.com/caolan/async provides 2 similar methods, async.waterfall and async.series .
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Initializing a list to a known number of elements in Python [duplicate]
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answered Feb 6 '09 at 19:02
Steve LoshSteve Losh
18.5k22 gold badges4848 silver badges4444 bronze badges
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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...就是每条数据和simhash库里的数据比较需要做到3.6毫秒。
2、两条同一时刻发出的文本如果重复也只能保留一条。
3、希望保留2天的数据进行比较去重，按照目前的量级和未来的增长，2天大概在2000w — 5000w 中间。
4、短文本和...
Why do you need to invoke an anonymous function on the same line?
...nstructor
var sum = new Function('a','b', 'return a + b;');
alert(sum(10, 20)); //alerts 30
2. Using Function declaration.
function sum(a, b)
{
return a + b;
}
alert(sum(10, 10)); //Alerts 20;
3. Function Expression
var sum = function(a, b) { return a + b; }
alert(sum(5, 5)); // alerts ...
What's a redirect URI? how does it apply to iOS app for OAuth2.0?
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Read this:
http://www.quora.com/OAuth-2-0/How-does-OAuth-2-0-work
or an even simpler but quick explanation:
http://agileanswer.blogspot.se/2012/08/oauth-20-for-my-ninth-grader.html
The redirect URI is the callback entry point of the app. Think about how OAuth ...
Getting pids from ps -ef |grep keyword
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234
You can use pgrep as long as you include the -f options. That makes pgrep match keywords in th...
Bootstrap 3 breakpoints and media queries
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208
Bootstrap 4 Media Queries
// Extra small devices (portrait phones, less than 576px)
// No med...
Cannot read configuration file due to insufficient permissions
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How to append multiple values to a list in Python
...ny other thing that provides a sequence of values.
>>> lst = [1, 2]
>>> lst.append(3)
>>> lst.append(4)
>>> lst
[1, 2, 3, 4]
>>> lst.extend([5, 6, 7])
>>> lst.extend((8, 9, 10))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> lst...