大约有 2,100 项符合查询结果（耗时：0.0131秒） [XML]
Simple way to encode a string according to a password?
...re cipher. It is one of the strongest of the simple ancient ciphers.
Vigenère cipher
It's quick and easy to implement. Something like:
import base64
def encode(key, string):
encoded_chars = []
for i in xrange(len(string)):
key_c = key[i % len(key)]
encoded_c = chr(ord(st...
社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...框架（参考）。xpath 是一种结构化网页元素选择器，支持列表和单节点数据获取，他的好处可以支持规整网页数据抓取。我们使用的是google插件 XPath Helper，这个玩意可以支持在网页点击元素生成xpath，就省去了自己去查找xpath的...
Remove duplicated rows
I have read a CSV file into an R data.frame. Some of the rows have the same element in one of the columns. I would like to remove rows that are duplicates in that column. For example:
...
RESTful on Play! framework
...tUser method based on the Accept header?
– Timo Westkämper
Dec 7 '10 at 21:19
it is, but not entirely reliable. If pl...
HTML Submit-button: Different value / button-text?
...re suggestion in comments:
<input type="submit" name="add_tag" value="Lägg till tag" />
In your server side, you'll do something like:
if (request.getParameter("add_tag") != null)
tags.addTag( /*...*/ );
(Since I don't know that language (java?), there may be syntax errors.)
I woul...
How to split a comma-separated string?
...
A comma delimited file (csv) might have a a comma in quotes, meaning it's not a delimiter. In this case Split will not work.
– Steven Trigg
Mar 8 '14 at 2:35
...
What is the difference between a web API and a web service?
...s not mean it SOAP base service REST also support Command Separated Value (CSV), JavaScript Object Notation (JSON) and Really Simple Syndication (RSS).
– Adiii
Aug 12 '17 at 4:03
...
How can I trim leading and trailing white space?
...le the trailing white spaces when you read your data file. If you use read.csv or read.table you can set the parameterstrip.white=TRUE.
If you want to clean strings afterwards you could use one of these functions:
# Returns string without leading white space
trim.leading <- function (x) sub("^\\...
Why doesn't Ruby support i++ or i-- (increment/decrement operators)?
...d:
Hi,
In message "[ruby-talk:02706] X++?"
on 00/05/10, Aleksi Niemelä <aleksi.niemela@cinnober.com> writes:
|I got an idea from http://www.pragprog.com:8080/rubyfaq/rubyfaq-5.html#ss5.3
|and thought to try. I didn't manage to make "auto(in|de)crement" working so
|could somebody help h...
SQL - Update multiple records in one query
...
Also, it's a great way to turn a little bit of CSV (or a lot) into a table insert/update/upsert with some minor text editing!
– wulftone
Dec 8 '16 at 5:23
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