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r - Formatting dates with scale_x_date in ggplot2

In a previous version of ggplot2, I was able to use one of the two following commands to format my x dates: ... these error messages, I'd also appreciate it.) Question&Answers:os...

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

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python - How to understand numpy strides for layman?

I am currently going through numpy and there is a topic in numpy called "strides". I understand what it is. ... anyone let me understand in a layman's terms? Question&Answers:os...

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

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python - A fast way to find the largest N elements in an numpy array

I know I can do it like the following: import numpy as np N=10 a=np.arange(1,100,1) np.argsort()[ ... wonder whether numpy provide some methods the do it fast. Question&Answers:os...

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

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python - Seaborn Barplot - Displaying Values

I'm looking to see how to do two things in Seaborn with using a bar chart to display values that are in the ... is out of bounds for axis 0 with size 4 Question&Answers:os...

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

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optimization - SIMD instructions lowering CPU frequency

I read this article. It talked about why AVX-512 instruction: Intel's latest processors have advanced instructions ( ... my C++ application for Xeon Skylake. Question&Answers:os...

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

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python - How can I map True/False to 1/0 in a Pandas DataFrame?

I have a column in python pandas DataFrame that has boolean True/False values, but for further calculations I need 1/ ... a quick pandas/numpy way to do that? Question&Answers:os...

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

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iphone - Removing viewcontrollers from navigation stack

I have a navigation stack, with say 5 UIViewControllers. I want to remove the 3rd and 4th viewcontrollers in the stack ... it possible to do this? If so how? Question&Answers:os...

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

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android - match_parent width does not work in RecyclerView

My RecyclerView and item has match_parent width but the result is : <view class="android.support.v7.widget. ... src="@drawable/mmrdf" /> </LinearLayout> Question&Answers:os...

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

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c# - Using ChildActionOnly in MVC

When would you use the attribute ChildActionOnly? What is a ChildAction and in what circumstance would you want restrict an action using this attribute? Question&Answers:os...

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

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google maps - Drawing Route Between Two Places on GMSMapView in iOS

I am Developing an iOS Application. In that Application i am having 2 Fields From and To. I Entered Address ... give me some important links for this. Thanks. Question&Answers:os...

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

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android - How to Make an ImageView in Circular Shape?

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

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javascript - Can promises have multiple arguments to onFulfilled?

I'm following the spec here and I'm not sure whether it allows onFulfilled to be called with multiple arguments ... to follow the w3c spec for promises closely. Question&Answers:os...

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

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locale - How can I get my Android device country code without using GPS?

An Android mobile actually does know quite well where it is - but is there a way of retrieving the country by ... network provider? Because I am using a tablet. Question&Answers:os...

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

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javascript - AngularJS - UI Router - programmatically add states

Is there a way to programmatically add states to $stateProvider after module configuration, in e.g. service ? To ... go with the first option if possible. Question&Answers:os...

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

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android - Detect Scroll Up & Scroll down in ListView

I have the following requirement: At first, data for page no: 2 is fetched from the server & the items are populated ... up / scroll down action: link 1 link 2 Question&Answers:os...

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

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Android get Orientation of a camera Bitmap? And rotate back -90 degrees

I have this code: //choosed a picture public void onActivityResult(int requestCode, int resultCode, Intent data) ... do to rotate back the LANDSCAPE pictures? Question&Answers:os...

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

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sql - Return 0 if field is null in MySQL

In MySQL, is there a way to set the "total" fields to zero if they are NULL? Here is what I have: SELECT uo. ... be 0. How can I return 0 for NULL in MySQL? Question&Answers:os...

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

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sql - How to create a unique index on a NULL column?

I am using SQL Server 2005. I want to constrain the values in a column to be unique, while allowing NULLS ... unq_idx ON vw_unq (Column1) Any better ideas? Question&Answers:os...

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

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Load CSV data into MySQL in Python

Not sure what I'm missing here but this code runs without any error message, but there's nothing in the ... Would appreciate if someone else could have a look. Question&Answers:os...

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

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73 views

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Python 3 turn range to a list

I'm trying to make a list with numbers 1-1000 in it. Obviously this would be annoying to write/read, so ... Python 2? Can anyone provide some insight into this? Question&Answers:os...

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

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html - Disabled form fields not submitting data

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

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Consistency of hashCode() on a Java string

The hashCode value of a Java String is computed as (String.hashCode()): s[0]*31^(n-1) + s[1]*31^ ... () is totally irrelevant in the context of this question. Question&Answers:os...

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

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How do I use Java to read from a file that is actively being written to?

I have an application that writes information to file. This information is used post-execution to determine pass/ ... BufferedStreams. Is this the way to go? Question&Answers:os...

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

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473 views

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powershell - Comparing two arrays & get the values which are not common

i wanted a small logic to compare contents of two arrays & get the value which is not common amongst them using ... one help me out with the same! thanks! Question&Answers:os...

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

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How to create a read-only class property in Python?

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

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269 views

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ios - Best way to sort an NSArray of NSDictionary objects?

I'm struggling with trying to sort an array of dictionaries. My dictionaries have a couple of values of interest, price, popularity etc. Any suggestions? Question&Answers:os...

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

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83 views

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php - "vertical" regex matching in an ASCII "image"

Note: This is a question about possibilities of modern regex flavors. It's not about the best way to solve this using ... of them all (4 in the above example) Question&Answers:os...

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

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1.5k views

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sorting - How to use std::sort to sort an array in C++

How to use standard template library std::sort() to sort an array declared as int v[2000]; Does C++ provide ... can get the begin and end index of an array? Question&Answers:os...

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

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