OStack Q&A-Knowledge Sharing Community

0 votes

313 views

1 answer

python - Why are packages installed rather than just linked to a specific environment?

I've noticed that normally when packages are installed using various package managers (for python), they are installed in / ... be able to save a bit of space. Question&Answers:os...

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

0 votes

1.1k views

1 answer

function - Computing the cross product of two vectors in Fortran 90

I would like to compute the cross product of two vectors in Fortran 90. For example, in words, the cross product ... . Can you please help me see my error? Question&Answers:os...

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

0 votes

1.8k views

1 answer

jsp - Java error: Only a type can be imported. XYZ resolves to a package

I get the error: "Only a type can be imported. XYZ resolves to a package." Someone has ... .eresearch.knowledgeportal.model.Category resolves to a package Question&Answers:os...

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

0 votes

366 views

1 answer

c++ - How to find which elements are in the bag, using Knapsack Algorithm [and not only the bag's value]?

Here I have code which calculates the optimal value using the knapsack algorithm (bin packing NP-hard problem): int ... not just the value of the best solution. Question&Answers:os...

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

0 votes

1.2k views

1 answer

openssl - Python Requests requests.exceptions.SSLError: [Errno 8] _ssl.c:504: EOF occurred in violation of protocol

I'm on Ubuntu 12.10 with OpenSSL 1.0.1c, python 2.7.3, Requests 1.0.3 and 1.0.4 ( ... the python requests library. Any assistance would be greatly appreciated. Question&Answers:os...

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

0 votes

295 views

1 answer

python - pandas select from Dataframe using startswith

This works (using Pandas 12 dev) table2=table[table['SUBDIVISION'] =='INVERNESS'] Then I realized I needed ... produce more complex criteria: What am I missing? Question&Answers:os...

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

0 votes

106 views

1 answer

performance - Analyzing Code for Efficiency?

What kinds of tools do you use to determine the efficiency of code? Do you use home grown applications that ... tool that analyzes your code for weak spots? Question&Answers:os...

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

0 votes

165 views

1 answer

How to compare strings in C conditional preprocessor-directives

I have to do something like this in C. It works only if I use a char, but I need a string. How can I ... " #elif USER == "queen" #define USER_VS "jack" #endif Question&Answers:os...

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

0 votes

75 views

1 answer

javascript - Is it possible to use Ajax to do file upload?

I don't want to use jQuery, but I'd like to use Ajax to do file uploading. Is that possible? If so, where can I find information/tutorial on it? Question&Answers:os...

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

0 votes

406 views

1 answer

xml - Can Chrome be made to perform an XSL transform on a local file?

I was looking into xslt and started testing with the examples on w3schools. However, when I save the xml and ... .xml. Domains, protocols and ports must match. Question&Answers:os...

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

0 votes

441 views

1 answer

python - subprocess wildcard usage

import os import subprocess proc = subprocess.Popen(['ls','*.bc'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) ... the star symbol doesnt work.. Any ideas ? Question&Answers:os...

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

0 votes

104 views

1 answer

How to configure Git for using it with Dropbox?

I have been using git for half a year or so and I don't know whether I am using git fully. First ... whether the update has been pushed to the dropbox server Question&Answers:os...

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

0 votes

62 views

1 answer

How to define a relative path in java

Here is the structure of my project : I need to read config.properties inside MyClass.java. I tried to do so with ... I'm using jdk 1.6 and working on windows. Question&Answers:os...

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

0 votes

688 views

1 answer

css - Get element -moz-transform:rotate value in jQuery

I have CSS style for a layer: .element { -webkit-transform: rotate(7.5deg); -moz-transform: rotate(7.5deg); -ms- ... lot. What I'm looking to get is 7.5. Question&Answers:os...

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

0 votes

369 views

1 answer

jquery - How can I hide select options with JavaScript? (Cross browser)

This should work: $('option').hide(); // hide options It works in Firefox, but not Chrome (and probably ... again later, so this would not be very effective. Question&Answers:os...

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

0 votes

454 views

1 answer

c# - Unrecognized escape sequence for path string containing backslashes

The following code generates a compiler error about an "unrecognized escape sequence" for each backslash: string foo = ... escape backslash? How do I do that? Question&Answers:os...

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

0 votes

287 views

1 answer

width - Display: Inline block - What is that space?

This question already has answers here: Question&Answers:os...

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

0 votes

1.4k views

1 answer

python - PyQt showing video stream from opencv

Try to link PyQt and Opencv video feed, can't understand how to apply while loop for continuously streaming video. It just ... ex = App() sys.exit(app.exec_()) Question&Answers:os...

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

0 votes

139 views

1 answer

java - How to write data with FileOutputStream without losing old data?

If you work with FileOutputStream methods, each time you write your file through this methods you've been ... without losing your old data via FileOutputStream? Question&Answers:os...

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

0 votes

143 views

1 answer

Custom getFilter in custom ArrayAdapter in android

I am having trouble implementing custom getFilter in custom arrayAdapter. Actually I have no idea how to implement it. ... -generated method stub } }); Thanks. Question&Answers:os...

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

0 votes

1.1k views

1 answer

python - Reversing 'one-hot' encoding in Pandas

I want to go from this data frame which is basically one hot encoded. In [2]: pd.DataFrame({"monkey":[0 ... using indexing etc to try to solve this problem. Question&Answers:os...

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

0 votes

234 views

1 answer

css - Changing Background Image with CSS3 Animations

Why this isn't working? What am I doing wrong? CSS @-webkit-keyframes test { 0% { background-image: url(' ... DEMO http://jsfiddle.net/hAGKv/ Thanks in advance! Question&Answers:os...

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

0 votes

1.0k views

1 answer

match - Conditional merge/replacement in R

I have two data frames: df1 x1 x2 1 a 2 b 3 c 4 d and df2 x1 x2 2 zz 3 qq I want to replace some of the ... df2$x2 to produce: df1 x1 x2 1 a 2 zz 3 qq 4 d Question&Answers:os...

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

0 votes

124 views

1 answer

c# - Parsing large JSON file in .NET

I have used the "JsonConvert.Deserialize(json)" method of Json.NET so far which worked quite well and to be honest, ... : "sometext", "lastname": "sometext" } ] Question&Answers:os...

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

0 votes

682 views

1 answer

types - How do I define Lisp’s apply in Haskell?

Shouldn't this definition be allowed in a lazy language like Haskell in which functions are curried? apply f [ ... Lisp for example. Are there any workarounds? Question&Answers:os...

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

0 votes

252 views

1 answer

c++ - Why dereferencing a null pointer is undefined behaviour?

According to ISO C++, dereferencing a null pointer is undefined behaviour. My curiosity is, why? Why standard ... well defined. Machine dependency? Any ideas? Question&Answers:os...

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

0 votes

409 views

1 answer

Should jQuery's $(form).submit(); not trigger onSubmit within the form tag?

I have the following: <script type="text/javascript"> function CancelFormButton(button) { $(button.form).submit( ... a browser where the onsubmit is triggered. Question&Answers:os...

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

0 votes

332 views

1 answer

vba - Split comma separated entries to new rows

Closed. This question needs debugging details. It is not currently accepting answers. Question&Answers:os...

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

Categories

Recent questions

Just Browsing Browsing

Most popular tags