coding-style

问题 in react is it good to import external java script,jQuery ,css to index.htmal file in public folder. and if there is any impact to application performance. and i used some j Query functions inside of react application. example : datepicker it's also work fine i need to know is this way recommended ? is this effect to application performance ? or its not recomended & remove all external link and install dependencies with npm or yarn? when application build how react improve performance with

问题 What is the general consensus on writing for loops with if statements like this: for (int i = 0; i < hi; i++) { if (some invalid condition) { continue; } if (another invalid condition) { continue; } //do stuff here after passing all the invalid conditions } as opposed to for (int i = 0; i < hi; i++) { if (valid condition1 && valid condition 2 && ...) { //do stuff } It seems to me that the first way of writing it is much cleaner and more convenient for debugging, though it takes up more lines.

问题 Already had an initial program for this one, I made the code as much shorter and precise as possible. But upon checking it seems that the next 2 years still prints 2018 and I am expecting 2019 and 2020. How can I possible dynamically prints the year when it shows 2018, 2019, and 2020. might be I am missing some iterations in my code. Also feel free to criticize my code, you can also suggest more shorter codes by using the Calendar API or Java 8 utilities as much as you can. See code below:

问题 My settings module have some redondant code: #include <QSettings> class MySettings { public: // param1 void setParam1(QString param1) { _settings.setValue("param1", param1); } string param1() { return _settings.value("param1").toString(); } // param2 void setParam2(int param2) { _settings.setValue("param2", param2); } int param2() { _settings.value("param2").toInt(); } // param3 void setParam3(int param3) { _settings.setValue("param3", param3); } int param3() { _settings.value("param3").toInt

问题 The following looks like messy code, but I can't think how to make it neater. Any ideas? I want to call doSearch for values of 10, 20 and 30. If no results are returned for a value, then I want to try for the following value. Otherwise, just exit out. I know this would work, but is it the most readable way? SearchResult result = doSearch("10"); if (result.getResults() == null) { result = doSearch("20"); if (result.getResults() == null) { result = doSearch("30"); if (result.getResults() ==

问题 EDIT thx to all the answers, and finally I decide to use some tools like Step, all I need is "flow control" and don't want any thing else which may slow down the performance (I don't know how much exactly it would effect or the effect just can be ignored). So I just create a little tool for flow control: line.js /** * Create the "next" function * * @param {Array} tasks * @param {Number} index * @param {Number} last */ var next = function(tasks, index, last) { if (index == last) { return tasks

问题 A couple years ago I learned that global variables are bad and should be avoided. But I know they are sometimes unavoidable, at least in an embedded system. What do you think is the most elegant way to work with them? In my projects I have a file called globals.h where I define all my global variables: #ifndef GLOBALS_H #define GLOBALS_H extern int16_t gVariable1; extern int16_t gVariable2; …. #endif In my main project file I declare all global variables: /* **********************************

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: In C++ why have header files and cpp files? I was wondering if it is advisable to write a the whole class c++ in a header file ? and use include to include the class, in a similar way that java does its oop programming. Is it a bad style ? can anyone recommend me a "good" C++ oop style guide ? Also I wondering if template programming is what they really mean when they talk about someone who is experienced in c++

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 8 years ago . For those who misread the question: let's pretend we're on Wikipedia. I'm not looking for “the right way”, I'm looking for verifiable

问题 Just browsing over the latest release of the PHP coding standards, and something caught my eye: http://svn.php.net/viewvc/php/php-src/trunk/CODING_STANDARDS?revision=296679&view=markup Coding standard #4 states that "When writing functions that deal with strings, be sure to remember that PHP holds the length property of each string, and that it shouldn't be calculated with strlen()..." I've ALWAYS used strlen, and maybe it's just late, but how do you access the built-in length property of a