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linux - How does "cat << EOF" work in bash?

I needed to write a script to enter multi-line input to a program (psql). After a bit of googling, I found the ... exactly do? And is there a man page for it? Question&Answers:os...

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

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sql - Get list of all tables in Oracle?

How do I query an Oracle database to display the names of all tables in it? Question&Answers:os...

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

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macos - Set environment variables on Mac OS X Lion

When someone says "edit your .plist file" or "your .profile" or ".bash_profile" etc, this just confuses me. I ... to learn, but please explain for a novice... Question&Answers:os...

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

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javascript - How to dynamically change header based on AngularJS partial view?

I am using ng-view to include AngularJS partial views, and I want to update the page title and h1 header tags based on ... $http) { $scope.header = "Test 2"; } Question&Answers:os...

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

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How to call a Python function from Node.js

I have an Express Node.js application, but I also have a machine learning algorithm to use in Python. Is ... use of the power of machine learning libraries? Question&Answers:os...

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

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151 views

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What's the CMake syntax to set and use variables?

I'm asking this as a reminder to myself the next time I use CMake. It never sticks, and Google results aren't ... the syntax to set and use variables in CMake? Question&Answers:os...

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

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How to import a .cer certificate into a java keystore?

During the development of a Java webservice client I ran into a problem. Authentication for the webservice is ... user that would import the certificate later. Question&Answers:os...

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

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How can I get form data with JavaScript/jQuery?

Is there a simple, one-line way to get the data of a form as it would be if it was to be submitted in ... (function () { data[theFieldName] = theFieldValue; }); Question&Answers:os...

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

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c - Difference between static memory allocation and dynamic memory allocation

I would like to know what is the difference between static memory allocation and dynamic memory allocation? Could you explain this with any example? Question&Answers:os...

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

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SQL/mysql - Select distinct/UNIQUE but return all columns?

SELECT DISTINCT field1, field2, field3, ...... FROM table I am trying to accomplish the following sql statement ... like: SELECT DISTINCT field1, * from table Question&Answers:os...

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

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Laravel 5 - How to access image uploaded in storage within View?

I have got user's avatars uploaded in Laravel storage. How can I access them and render them in a view? The ... show them if they are in the /storage folder? Question&Answers:os...

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

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python - Expanding tuples into arguments

Is there a way to expand a Python tuple into a function - as actual parameters? For example, here expand() ... but of course there may be legacy code. Thanks Question&Answers:os...

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

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ios - Safe Area of Xcode 9

While exploring Xcode9 Beta Found Safe Area on Interface builders View hierarchy viewer. Got curious and tried to ... system that can interact with Auto Layout. Question&Answers:os...

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

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967 views

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mapping - Converting from longitudelatitude to Cartesian coordinates

I have some earth-centered coordinate points given as latitude and longitude (WGS-84). How can i convert them to ... the origin at the center of the earth? Question&Answers:os...

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

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c# - What does principal end of an association means in 1:1 relationship in Entity framework

public class Foo { public string FooId{get;set;} public Boo Boo{get;set;} } public class Boo { public ... to understand what the term "principal end" means. Question&Answers:os...

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

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unix - How can I use a Python script in the command line without cd-ing to its directory? Is it the PYTHONPATH?

How can I make any use of PYTHONPATH? When I try to run a script in the path the file is not found. When I ... ] Why can I not make any use of the PYTHONPATH? Question&Answers:os...

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

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java - Scanner vs. StringTokenizer vs. String.Split

I just learned about Java's Scanner class and now I'm wondering how it compares/competes with the StringTokenizer ... to be one-stop-shopping for spliting? Question&Answers:os...

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

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122 views

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c# - Why can't I define a default constructor for a struct in .NET?

In .NET, a value type (C# struct) can't have a constructor with no parameters. According to this ... enough to prevent definition of a default constructor. Question&Answers:os...

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

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236 views

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Can I mix Swift with C++? Like the Objective-C .mm files

I just changed my .m files to .mm and use C++. Is there a way to do the same with Swift? Question&Answers:os...

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

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653 views

1 answer

swift2 - Overriding methods in Swift extensions

I tend to only put the necessities (stored properties, initializers) into my class definitions and move everything ... extensions for grouping code like I do? Question&Answers:os...

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

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233 views

1 answer

sql - PostgreSQL DISTINCT ON with different ORDER BY

I want to run this query: SELECT DISTINCT ON (address_id) purchases.address_id, purchases.* FROM purchases ... possible to do without ordering by address_id? Question&Answers:os...

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

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243 views

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r - How to subset matrix to one column, maintain matrix data type, maintain row/column names?

When I subset a matrix to a single column, the result is of class numeric, not matrix (i.e. myMatrix[ , 5 ] ... ( myMatrix ) , colnames( myMatrix )[ 5 ] ) Question&Answers:os...

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

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341 views

1 answer

css - Make flex-grow expand items based on their original size

I have 3 buttons in a row which all vary in width. I want them to all gain width the same to fill the remaining ... --3">Another really large title</a> </div> Question&Answers:os...

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

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153 views

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Why is the id of a Python class not unique when called quickly?

I'm doing some things in Python (3.3.3), and I came across something that is confusing me since to my ... try to call the same class two or more times. Question&Answers:os...

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

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189 views

1 answer

Java Swing button colors

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

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

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112 views

1 answer

java - Display indeterminate JProgressBar while batch file runs

I've been browsing SO and google for a while now for an answer to this question, but I can't seem to ... that a process is still running. Thoughts? Thanks! Question&Answers:os...

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

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139 views

1 answer

c# - Regex.Match whole words

In C#, I want to use a regular expression to match any of these words: string keywords = "(shoes|shirt|pants ... pants. How do I match only those literal words? Question&Answers:os...

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

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268 views

1 answer

java - Centering a JLabel on a JPanel

I'm using the NetBeans GUI builder to handle my layout (I'm terrible with LayoutManagers) and am trying to place ... who can steer me in the right direction! Question&Answers:os...

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

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