Hot questions

0 votes

295 views

1 answer

rust - How do I require a generic type implement an operation like Add, Sub, Mul, or Div in a generic function?

I'm trying to implement a generic function in Rust where the only requirement for the argument is that the ... wrong trait? How can I resolve this? Question&Answers:os...

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

0 votes

289 views

1 answer

github - How can I delete all Git branches which have been merged?

I have many Git branches. How do I delete branches which have already been merged? Is there an easy way to delete them all instead of deleting them one by one? Question&Answers:os...

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

0 votes

979 views

1 answer

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)

0 votes

262 views

1 answer

android - How can I programmatically tell if a Bluetooth device is connected?

I understand how to get a list of paired devices, but how can I tell if they are connected? It must ... device list and it states their connection status. Question&Answers:os...

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

0 votes

544 views

1 answer

javascript - How to resize images proportionally / keeping the aspect ratio?

I have images that will be quite big in dimension and I want to shrink them down with jQuery while keeping the ... me to some code, or explain the logic? Question&Answers:os...

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

0 votes

283 views

1 answer

parsing - Java: parse int value from a char

I just want to know if there's a better solution to parse a number from a character in a string (assuming that ... (useless to say that it's just an example) Question&Answers:os...

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

0 votes

147 views

1 answer

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)

0 votes

239 views

1 answer

Simple and tested online regex containing regex delimiters does not work in C# code

I have a regex like this: name = dr-det-fb.ydp.eu/ebook/trunk/annotations/ctrl.php/api1751-4060-1193-0487 name ... But it doesn't, can someone explain me why? Question&Answers:os...

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

0 votes

88 views

1 answer

How do you select a particular option in a SELECT element in jQuery?

If you know the Index, Value or Text. also if you don't have an ID for a direct reference. This, this and this ... ="SEL2">Selection 2</option> </select> </div> Question&Answers:os...

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

0 votes

245 views

1 answer

java - Conditionally ignoring tests in JUnit 4

OK, so the @Ignore annotation is good for marking that a test case shouldn't be run. However, sometimes I want to ... this, I'd be happy to hear about it. Question&Answers:os...

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

0 votes

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)

0 votes

470 views

1 answer

Variable Length Array (VLA) in C++ compilers

As we already know, VLA (standardized in C99) are not part of the standard in C++. So the code ... but I cannot find anything about the standard behaviour. Question&Answers:os...

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

0 votes

156 views

1 answer

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)

0 votes

209 views

1 answer

security - .NET obfuscation tools/strategy

Closed. This question is opinion-based. It is not currently accepting answers. Question&Answers:os...

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

0 votes

132 views

1 answer

javascript - Define global variable with webpack

Is it possible to define a global variable with webpack to result something like this: var myvar = {}; All of ... file require("imports?$=jquery!./file.js") Question&Answers:os...

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

0 votes

140 views

1 answer

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)

0 votes

471 views

1 answer

c# - Do you need to dispose of objects and set them to null?

Do you need to dispose of objects and set them to null, or will the garbage collector clean them up when they go out of scope? Question&Answers:os...

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

0 votes

476 views

1 answer

ios - Figure out size of UILabel based on String in Swift

I am trying to calculate the height of a UILabel based on different String lengths. func calculateContentHeight() -> ... answer in Swift and not Objective C. Question&Answers:os...

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

0 votes

243 views

1 answer

Determine if Android app is being used for the first time

I am currently developing an android app. I need to do something when the app is launched for the first time, ... on the first time the program is launched. Question&Answers:os...

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

0 votes

178 views

1 answer

c++ - Static variables initialisation order

C++ guarantees that variables in a compilation unit (.cpp file) are initialised in order of declaration. For number ... to new GCC major and different OS)? Question&Answers:os...

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

0 votes

61 views

1 answer

Understanding typedefs for function pointers in C

I have always been a bit stumped when I read other peoples' code which had typedefs for pointers to functions ... and how to understand others' work? Thanks! Question&Answers:os...

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

0 votes

190 views

1 answer

javascript - Insert ellipsis (...) into HTML tag if content too wide

I have a webpage with an elastic layout that changes its width if the browser window is resized. In this ... one line at the current screen/container width? Question&Answers:os...

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

0 votes

71 views

1 answer

How to [recursively] Zip a directory in PHP?

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

296 views

1 answer

r - How to find common elements from multiple vectors?

Can anyone tell me how to find the common elements from multiple vectors? a <- c(1,3,5,7,9) b <- c(3,6 ... common elements from the above vectors (ex: 3 and 9) Question&Answers:os...

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

0 votes

74 views

1 answer

How do you send a HEAD HTTP request in Python 2?

What I'm trying to do here is get the headers of a given URL so I can determine the MIME type. I want to be ... . Does anyone know of an easy way of doing this? Question&Answers:os...

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

0 votes

171 views

1 answer

css - Is it possible to center text in select box?

I tried this: http://jsfiddle.net/ilyaD/KGcC3/ HTML: <select name="state" class="ddList"> <option value="">( ... CSS-only way to center text in the select-box? Question&Answers:os...

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

0 votes

64 views

1 answer

javascript - Browsers, time zones, Chrome 67 Error (historic timezone changes)

I've updated Chrome to 67 version. And I get an error with the date ============== Microsoft Edge 42.17134.1.0 new Date(" ... rewrite... ====================== Question&Answers:os...

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

0 votes

67 views

1 answer

How do I create a dynamic key to be added to a JavaScript object variable

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

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

Categories

Just Browsing Browsing

Most popular tags