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css - Difference between static and relative positioning

In CSS, what is the difference between static (default) positioning and relative positioning? See Question&Answers more detail:os...

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

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357 views

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Slow pagination over tons of records in mongodb

I have over 300k records in one collection in Mongo. When I run this very simple query: db.myCollection.find(). ... . How to make it better? See Question&Answers more detail:os...

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

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python - How to query MultiIndex index columns values in pandas

Code example: In [171]: A = np.array([1.1, 1.1, 3.3, 3.3, 5.5, 6.6]) In [172]: B = np. ... of A and B as data columns in addition to index. See Question&Answers more detail:os...

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

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git filter branch - How can I move a directory in a Git repo for all commits?

Let's say I have a repo that includes this directory structure: repo/ blog/ _posts/ some-post.html another-file.txt ... to do that. Any ideas? See Question&Answers more detail:os...

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

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arrays - How to divide a set into two subsets such that difference between the sum of numbers in two sets is minimal?

Given a set of numbers, divide the numbers into two subsets such that difference between the sum of numbers in ... solution? Can we do better? See Question&Answers more detail:os...

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

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iphone - UIBezierPath Subtract Path

By using [UIBezierPath bezierPathWithRoundedRect:byRoundingCorners:cornerRadii:], I am able to create a rounded view ... fromPath:bigMaskPath]; See Question&Answers more detail:os...

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

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postgresql - How to add "on delete cascade" constraints?

In PostgreSQL 8 is it possible to add ON DELETE CASCADES to the both foreign keys in the following table without ... (gid) ON DELETE CASCADE; See Question&Answers more detail:os...

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

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Elasticsearch: Failed to connect to localhost port 9200 - Connection refused

When I tried connecting to Elasticsearch using the curl http://localhost:9200 it is working fine. But when I run ... How to resolve this error? See Question&Answers more detail:os...

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

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Best way to detect Mac OS X or Windows computers with JavaScript or jQuery

So I'm trying to move a "close" button to the left side when the user is on Mac and the right side ... what's better than user agent sniffing? See Question&Answers more detail:os...

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

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javascript - How to remove element from array in forEach loop?

I am trying to remove an element in an array in a forEach loop, but am having trouble with the standard solutions I' ... [? ? ?] is still there. See Question&Answers more detail:os...

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

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python - How can I plot a histogram such that the heights of the bars sum to 1 in matplotlib?

I'd like to plot a normalized histogram from a vector using matplotlib. I tried the following: plt.hist(myarray, normed= ... -- how can I do it? See Question&Answers more detail:os...

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

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web services - How to obtain longitude and latitude for a street address programmatically (and legally)

Supposedly, it is possible to get this from Google Maps or some such service. (US addresses only is not good enough.) See Question&Answers more detail:os...

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

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How to specify the actual x axis values to plot as x axis ticks in R

I am creating a plot in R and I dont like the x axis values being plotted by R. For example: x <- seq( ... one has ever tried to do this before. See Question&Answers more detail:os...

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

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.net - How can I install a certificate into the local machine store programmatically using c#?

I have a certificate generated via MakeCert. I want to use this certificate for WCF message security using PeerTrust. ... can also create a PFX. See Question&Answers more detail:os...

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

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html - How to embed a Google Drive folder in a website

I have a folder in Google Drive that I'd like to embed in my website. I can't find an embed code ... documented in Google Drive Help articles. See Question&Answers more detail:os...

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

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228 views

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objective c - iPhone :UITableView CellAccessory Checkmark

In iPhone App on click of table view cell I want to display Table view cell Accessory type Check mark for that ... How can I achieve that? See Question&Answers more detail:os...

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

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87 views

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How to set warning level in CMake?

How to set the warning level for a project (not the whole solution) using CMake? Should work on ... not consistent with the documentation. See Question&Answers more detail:os...

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

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201 views

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c# - How to catch SQLServer timeout exceptions

I need to specifically catch SQL server timeout exceptions so that they can be handled differently. I know I could catch ... else { throw; } } See Question&Answers more detail:os...

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

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1.3k views

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sqlite encryption for android

i'm looking very hard for a possibility to encrypt my sqlite database on Android devices, but I was't able to ... solve this issue for his own? See Question&Answers more detail:os...

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

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222 views

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How can I autoplay a video using the new embed code style for Youtube?

I can't work out how to autoplay a video using the new embed code style for Youtube. I tried adding &autoplay=1 ... me how to do it? Thanks See Question&Answers more detail:os...

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

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245 views

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r - Apply a function to every row of a matrix or a data frame

Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would ... the function in the way you specify? See Question&Answers more detail:os...

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

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557 views

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javascript - How to solve 'Redirect has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header'?

I am working on an app using Vue js. According to my setting I need to pass to a variable to my URL ... :8080' is therefore not allowed access. See Question&Answers more detail:os...

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

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454 views

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Sass combining parent using ampersand (&) with type selectors

I am having trouble with nesting in Sass. Say I have the following HTML: <p href="#" class="item">Text</p> ... it is part of the same element? See Question&Answers more detail:os...

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

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246 views

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r - Sort columns of a dataframe by column name

This is possibly a simple question, but I do not know how to order columns alphabetically. test = data.frame(C ... needs to be more automated. See Question&Answers more detail:os...

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

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79 views

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How do I merge a sub directory in Git?

Is it possible to merge only the changes for a sub-directory from a local Git branch to a remote Git branch or ... contents of branch-b dir-1. See Question&Answers more detail:os...

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

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1.1k views

1 answer

swing - Creating a custom JButton in Java

Is there a way to create a JButton with your own button graphic and not just with an image inside the button ... a custom JButton in java? See Question&Answers more detail:os...

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

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339 views

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python - Pandas sum by groupby, but exclude certain columns

What is the best way to do a groupby on a Pandas dataframe, but exclude some columns from that groupby? e ... and which ones to exclude? See Question&Answers more detail:os...

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

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168 views

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php - Codeigniter - no input file specified

I am a beginner in Codeigniter and I saw a CI tutorial and was just trying to do a simple thing. I downloaded ... , I named the file site.php See Question&Answers more detail:os...

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

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