早上在 OSDC.TW 分享的 A Brief Introduction to C++11 投影片.
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“把類似 monit 這樣的 watchdog 機制用在 worker threads 上或許是個好主意.” 前陣子同事在聊天的時候跟我提起這樣的想法.
“我們可以做一個 watchdog thread, 並且讓每個 worker thread 定期向 watchdog 打 heartbeat.” 他向我進一步說明.
“這樣當其中有 worker 出錯, 沒反應, 以及進入死循環的時候我們就可以把它幹掉, 或許還可以重起.” 同事愈說愈起勁. View full article »
Before we dive into the topic of this post, I would like to share with you the best possible advise I could ever give – never do everything by the book.
I know it sounds kinda odd and may appear to be irresponsible. After all, this series is about what to avoid and promote best practice. Am I not asking you do what I tell you? No, I am not.
I am asking you to think and to reason consciously why you chose to code something the way you did.
In the first post of this series, I wrote about how returning early improves code readability. It may appear so in the code snip presented in the post. It may seem to be appropriate in scenarios off the top of your head. However, I am most certain that there are contexts where returning early actually does the opposite – hurting code readability.
It is important that we understand a best practice is anything but the law. When circumstances change, it may not stand.
I ask you to think as you code.
Now, back to the topic. In this post, we will revisit a well known best practice from a less discussed perspective. View full article »
A very interesting and informative answer on Stack Overflow.
Note in the end of the post, author of the answer presented a trick demonstrating how one could overload functions by return type. Coincidentally, a similar hack had been shown in an earlier post of mine.
One more example why you shouldn’t insist on using different naming schemes to name classes from functions consistently.
Hey, sometimes, objects are functions and functions are objects.
It has been a while since I last wrote. It is not that I wrote enough, I still love it, and am keen to share my (possibly biased) thoughts with fellow developers out there. But life and work have kept me busy in the past few months, busier than I would like to be.
Anyhow, I am starting a series of posts called “Root of All Evil”. The plan is to write about bad practices I see at work, on the Internet, and smelly code I used to write. I hope to be able to cover the following aspects:
- What does bad code look like
- Why is it bad
- And how it could be improved/refactored
If you happen to care reading my blog, chances are you won’t be contributing too many of those. However, even if they were someone else’s responsibility, it is essential that you I encourage you to step up, and talk him/her into making necessary changes and quitting the habit, perhaps over a cup of coffee or via a formal code review.
Though it is unlikely that I would have the luxury and the time to write weekly as I used to, I will just do my best. This series will be written casually, in Chinese or in English, yes, depending on my mood. So, bear with me and here it goes. View full article »
Hi Sam,
你的 留言 讓我想了許久. 小弟以為, 原創的繁中技術文字過少的最大關鍵不在於書籍市場, 而在寫的動機. 只要找到非金錢回報的動機, 就能寫得下去. 畢竟, 這是個屬於網路的年代, 只要有心有料, 甚至只要自 high, 誰都可以發表.
我們都在這片土地上生活, 在這個業界燃燒熱血, 盼望能實現自己的夢想. 以我為例, 我的夢想是台灣能有個健康前瞻有搞頭的軟體產業. 讓我們不一定要離鄉背井, 才能夠免去賣肝的宿命, 可以好好賣腦揮撒我們的熱情展現我們的專業, 並且得到適當的回報.
我很清楚, 在這個大環境, 我的想法多少不太現實. 即便如此, 除了抱怨, 我還選擇盡一點微薄的力量. 這個部落格能還能活著, 最大的動力正是對這個夢想的執著.
你的夢想是什麼?
[後記] 這篇文字是在抒發我的牢騷, 非針對個人. Sam, 不好意思借用了你的名字…
可能會出乎不少人的意料, 下面的 code snip 可能會拋出 exception.
using namespace std;
T* new_t_nothrow()
{
return new (nothrow) T;
}
你一定看過這樣的 code:
int do_work(size_t n)
{
int result = ERROR;
char* buf;
if(n)
{
buf = malloc(n);
if(buf != 0)
{
if(do_foo(buf, n) == OKAY)
{
if(do_bar(buf, n) == OKAY)
result = OKAY;
}
free(buf);
}
}
return result;
}
可讀性差的巢狀 if block, 只為了堅持由一處 return.
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“你怎麼在看簡體的東西!?” 不久前, 一位同事在會議中看到我在 NB 上讀到一半的一篇簡體文章, 驚訝地對我說.
“醒醒吧老兄. 對岸華人同胞產出的技術性文章, 不論是原創或翻譯, 不管是數量甚至很可能連質量, 都超過我們了啊.” 我心理的 OS.
是的, 我的 feed subscription 的數量: 英文 > 簡中 > 繁中.
台灣, 加油好嗎? 要了解自己, 搞清楚自己的強項面對自己的短處. 不必自大也不需自卑, 別成了井底之蛙.