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c++ - Why does calling std::string.c_str() on a function that returns a string not work?

I have the following code: std::string getString() { std::string str("hello"); return str; } int main() { ... , when is str destroyed, and why? See Question&Answers more detail:os...

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

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Can I invoke a java method other than main(String[]) from the command line?

Can I invoke a java method other than main(String[]) from the command line? See Question&Answers more detail:os...

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

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c++ - is there an iterator across unique keys in a std::multimap?

Is there a simple or standard way to have a multimap iterator which iterate across unique keys in a multimap? i.e. ... point to {3, "angel"}? See Question&Answers more detail:os...

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

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Unable to Merge Dex - Android Studio 3.0

When I updated my Android Studio to 3.0 in the stable channel and ran the project, I started getting the ... solve this error. Please help. See Question&Answers more detail:os...

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

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c - When an int is cast to a short and truncated, how is the new value determined?

Can someone clarify what happens when an integer is cast to a short in C? I'm using Raspberry Pi, so I'm ... truncated from 32 bits to 16 bits? See Question&Answers more detail:os...

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

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serialization - How to serialize a non-serializable in Java?

How can I serialize an object that does not implement Serializable? I cannot mark it Serializable because the class is from a 3rd party library. See Question&Answers more detail:os...

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

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ms access - [] brackets in sql statements

What do the brackets do in a sql statement? For example, in the statement: insert into table1 ([columnname1], ... table name is in brackets? See Question&Answers more detail:os...

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

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types - What is the inclusive range of float and double in Java?

What is the inclusive range of float and double in Java? Why are you not recommended to use float or ... anything where precision is critical? See Question&Answers more detail:os...

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

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algorithm - How to generate a random permutation in Java?

What is the best way to generate a random permutation of n numbers? For example, say I have a set of ... them randomly? Please assist. 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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Having both single and double quotation in a Python string

I'm trying to have a string that contains both single and double quotation in Python (' and "). However, ... single quotation together as it is. See Question&Answers more detail:os...

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

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php - Remove repeating character

How would I remove repeating characters (e.g. remove the letter k in cakkkke for it to be cake)? One ... using regex or built-in functions? See Question&Answers more detail:os...

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

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c# - Catching unhandled exception on separate threads

I am using the following event to catch unhandled exceptions in the main UI thread. Application.ThreadException ... the application closing? See Question&Answers more detail:os...

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

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c++ - Detect when multiple enum items map to same value

Is there a compile-time way to detect / prevent duplicate values within a C/C++ enumeration? The catch is that there ... C and C++ is 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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Excel VBA: Range to String Array in 1 step

I know you can easily take a range of cells and slap them into a Variant Array but I want to work with a ... in one shot. Thanks, everyone. 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 - What is the best way to emulate an HTML input "maxlength" attribute on an HTML textarea?

An HTML text input has an attribute called "maxlength", implemented by browsers, which if set blocks user input ... that you have used. See Question&Answers more detail:os...

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

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Forcing excess-property checking on variable passed to TypeScript function

Is there a way to force excess-property checking to happen, not just for an inlined object literal but one that ... assigned to a variable? ? See Question&Answers more detail:os...

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

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android - BroadcastReceiver as inner class

I know the BroadcastReceiver can't be used if defined as Activity's inner class. But I wonder why? Is ... have instantiated a receiver instance? See Question&Answers more detail:os...

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

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mouseevent - Distinguish between a single click and a double click in Java

I search the forum and see this codes: public void mouseClicked(MouseEvent e) { if (e.getClickCount() == 2) { ... ways to do this? Thank you! See Question&Answers more detail:os...

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

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objective c - Track all ObjC method calls?

Sometimes when looking at someone else's large Objective-C program, it is hard to know where to begin. In ... limited to non-Apple methods. See Question&Answers more detail:os...

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

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java - Counting trailing zeros of numbers resulted from factorial

I'm trying to count trailing zeros of numbers that are resulted from factorials (meaning that the numbers get quite ... not working. 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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css - Changing Body Font-Size based on Font-Family with jQuery

I'm trying to use Myriad Pro as my primary font with Arial and such as a fall-back like so: font: 13px " ... your time, help and generosity :) 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 - Re-Apply currency formatting to a UITextField on a change event

I'm working with a UITextField that holds a localized currency value. I've seen lots of posts on how to ... would be much appreciated! 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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pointfree - Currying 3 Arguments in Haskell

I'm having trouble with currying a function to remove three arguments in Haskell. Disclaimer: Not Coursework, I was ... 'm being an idiot... See Question&Answers more detail:os...

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

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Running compiled python (py2exe) as administrator in Vista

Is it possible to programaticly run compiled Python (comiled via py2exe) as administrator in Vista? Some ... correct privileges programaticly. 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 - Minimal set of files required to distribute an embed-Cython-compiled code and make it work on any machine

TL;DR: how to use Cython as a distribution method instead of Py2exe, cx_freeze, pyinstaller, etc. Following ... previously installed on 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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Android: Free Cropping of Image

I want to do free style of cropping on Image... where image can be from Gallery or Can be from Camera... is there any solution regarding this? See Question&Answers more detail:os...

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

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What is the max key size for an array in PHP?

I am generating associative arrays and the key value is a string concat of 1..n columns. Is there a max ... probably stop and do it differently. 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 parseFloat in Different Cultures

I have a question about the default behavior of JavaScript's parseFloat function in different parts of the world. ... this doesn't make sense. See Question&Answers more detail:os...

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

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