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regex - How do you match only valid roman numerals with a regular expression?

Thinking about my other problem, i decided I can't even create a regular expression that will match roman ... is it expressible in a context-free grammar? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - open_basedir restriction in effect. File(/) is not within the allowed path(s):

I'm getting this error on an avatar upload on my site. I've never gotten it before and nothing was changed recently ... (/) is not within the allowed path(s): Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - How to query JSON data column using Spark DataFrames?

I have a Cassandra table that for simplicity looks something like: key: text jsonData: text blobData: blob ... and return blobData. Is this currently possible? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Taking subarrays from numpy array with given stride/stepsize

Lets say I have a Python Numpy array a. a = numpy.array([1,2,3,4,5,6,7,8,9,10,11]) I want to create ... :i+5] Is there a cleaner way to implement this in Numpy? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Do regular expressions from the re module support word boundaries ()?

While trying to learn a little more about regular expressions, a tutorial suggested that you can use the to match ... in Python or am I using it wrong? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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html - Mystery white space underneath image tag

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to convert comma separated values to rows in oracle?

Here is the DDL -- create table tbl1 ( id number, value varchar2(50) ); insert into tbl1 values (1, 'AA, UT, BT, ... SK 3 SX 3 ZF How do we write SQL for this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to cast the DateTime to Time

I am casting DateTime field to Time by using CAST Syntax. select CAST([time] as time) as [CSTTime] DateTime 2015-03 ... or Cast it to exact HH:MM:SS Format. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - Reading quoted/escaped arguments correctly from a string

I'm encountering an issue passing an argument to a command in a Bash script. poc.sh: #!/bin/bash ARGS='"hi ... , with "hi there" having no quotes around it? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - How to make Twitter Bootstrap menu dropdown on hover rather than click

I'd like to have my Bootstrap menu automatically drop down on hover, rather than having to click the menu title. ... the little arrows next to the menu titles. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - String representation of an Enum

I have the following enumeration: public enum AuthenticationMethod { FORMS = 1, WINDOWSAUTHENTICATION = 2, SINGLESIGNON ... but that wasn't better either. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Change the URL in the browser without loading the new page using JavaScript

How would I have a JavaScript action that may have some effects on the current page but would also change the ... trying to record JavaScript state in the URL. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Test if a vector contains a given element

How to check if a vector contains a given value? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Force DOM redraw/refresh on Chrome/Mac

Every once in a while, Chrome will render perfectly valid HTML/CSS incorrectly or not at all. Digging in through ... example above) that works on Chrome/Mac? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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JavaScript function to add X months to a date

I'm looking for the easiest, cleanest way to add X months to a JavaScript date. I'd rather not handle the ... Is there something built in that can do this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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gcc - Scanf skips every other while loop in C

I'm trying to develop a simple text-based hangman game, and the main game loop starts with a prompt to enter a guess at ... using gcc 4.0.1 on Mac OS X 10.5. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How do I migrate an SVN repository with history to a new Git repository?

I read the Git manual, FAQ, Git - SVN crash course, etc. and they all explain this and that, but nowhere ... just to say what steps to take given this example. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Comparison of Android Web Service and Networking libraries: OKHTTP, Retrofit and Volley

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Using both Python 2.x and Python 3.x in IPython Notebook

I use IPython notebooks and would like to be able to select to create a 2.x or 3.x python ... IPython notebook, preferably with my current MacPorts build? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - pip install from git repo branch

Trying to pip install a repo's specific branch. Google tells me to pip install https://github.com/user/repo.git@branch ... a 404. How do I install this branch? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get OS-level system information

I'm currently building a Java app that could end up being run on many different platforms, but primarily ... like to get this information without using JNI. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

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image - img src SVG changing the styles with CSS

html <img src="logo.svg" alt="Logo" class="logo-img"> css .logo-img path { fill: #000; } The above svg loads ... SVG and I am not sure why it's not working. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails

I'm having a bit of a strange problem. I'm trying to add a foreign key to one table that references ... sourcecodes (id) ON DELETE CASCADE ON UPDATE CASCADE Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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What are invalid characters in XML

I am working with some XML that holds strings like: <node>This is a string</node> Some of the strings that ... or provide me with a list of illegal characters? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to find list intersection?

a = [1,2,3,4,5] b = [1,3,5,6] c = a and b print c actual output: [1,3,5,6] expected ... can we achieve a boolean AND operation (list intersection) on two lists? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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227 views

1 answer

Linear Regression and group by in R

I want to do a linear regression in R using the lm() function. My data is an annual time series with one field for ... by'. What's the R way of doing this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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161 views

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javascript - Cache busting via params

We want to cache bust on production deploys, but not waste a bunch of time off the bat figuring out a ... the param indicates that this is dynamic content? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to sort a list of strings numerically?

I know that this sounds trivial but I did not realize that the sort() function of Python was weird. I have a ... more or less useful than the .sort() function. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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