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2015年硅谷最火的高科技创业公司都有哪些 - 资讯 - 清泛网 - 专注C/C++及内核技术
...一下Hadoop的工作原理？
我们先说HDFS，所谓Hadoop的分布式文件系统，它是能真正做到高强度容错。并且根据locality原理，对连续存储做了优化。简单说就是分配大的数据块，每次连续读整数个。如果让你自己来设计分布式文件系...
How do I get AWS_ACCESS_KEY_ID for Amazon?
...ll how to create a new one:
Create a new access key:
"Download the .csv key file, which contains the access key ID and secret access key.":
As for your other questions:
I'm not sure about MERCHANT_ID and MARKETPLACE_ID.
I believe your sandbox question was addressed by Amit's point that...
MySQL: Large VARCHAR vs. TEXT?
...links
MEDIUMTEXT
Case: large json bodies, short to medium length books, csv strings
LONGTEXT
Case: textbooks, programs, years of logs files, harry potter and the goblet of fire, scientific research logging
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How do I design a class in Python?
...e data: my_measurements.save('filename.pickle')
Consider using pandas.read_csv() instead of manually reading the text files.
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Why would I use a templating engine? jsp include and jstl vs tiles, freemarker, velocity, sitemesh
...ontent type of the same model, let say JSON payload, webpage, e-mail body, CSV and so on.
Non Java programmer may have difficulties to work with JSP templates, when non technical people never had difficulties to modify regular templates.
I was asking same question long time ago and ended by writin...
Factors in R: more than an annoyance?
...theory is that 90% of why they're a pain is because in read.table and read.csv, the argument stringsAsFactors = TRUE by default (and most users miss this subtlety). I say they are useful because model fitting packages like lme4 use factors and ordered factors to differentially fit models and determi...
Can the :not() pseudo-class have multiple arguments?
... @BoltClock Delayed, but, hence the desire for the :not([attr],[attr]) CSV format as well :-P
– TylerH
Feb 20 '17 at 15:12
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快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...一天下午收盘后，整理好的，人工审核无误，软件里做了保存）。
我的电脑用了一款虚拟系统软件，可以很方便随时在两个系统里切换，所以，可以让软件同时做2个账户，相互不干扰。当然，如果，再用上VM等虚拟系统软件，...
How to do a PUT request with curl?
...a file with a POST request:
curl -X POST "YOUR_URI" -F 'file=@/file-path.csv'
Alternative solution:
You can use the POSTMAN app from Chrome Store to get the equivalent cURL request. This is especially useful when writing more complicated requests.
For the request with other formats or for diff...
Progress indicator during pandas operations
...as being lazy about data import (pandas is just too good at handling messy csv!!) and a few of my entries (~1%) had completely whacked out insertions (think whole records inserted into single fields). Eliminating these cause a massive speed up in the feature rollup since there was no ambiguity abou...