JS 依照元素出現數量排序
同樣是最近遇到的狀況，需要利用陣列內元素出現的數量進行排序，以下為範例程式：
var array = ["1", "2", "4", "5", "2", "4", "2", "3"];
var str = array.toString();
var filter = [];
var result = [];
document.write("原始陣列：" + array + "<br>");
var get = function (str, tar, arr, tmp) {
if (str.indexOf(tar) >= 0) {
tmp = str.slice(str.indexOf(tar) + 1);
arr.push(tar);
get(tmp, tar, arr, tmp);
}
return arr;
}
for (i in array) {
var elm = [];
var tmp;
var fstr = filter.join();
if (fstr.indexOf(array[i]) >= 0) {
continue;
} else {
var tmp_arr = get(str, array[i], elm, tmp);
result.push(tmp_arr.length + ':' + tmp_arr[0]);
filter.push(array[i]);
}
}
result.sort();
result.reverse();
//按照出現次數排序，不刪除重複元素
var finishArray = [];
for (index in result) {
var show = result[index].split(':');
for (i = 0; i < show[0]; i++) {
finishArray.push(show[1]);
}
}
document.write("按出現次數排序，不刪除重複元素：" + finishArray + "<br>");
//按照出現次數排序，刪除重複元素
var finishArray = [];
for (index in result) {
var show = result[index].split(':');
finishArray.push(show[1]);
}
document.write("按出現次數排序，刪除重複元素：" + finishArray + "<br>");
輸出結果：
原始陣列：1,2,4,5,2,4,2,3 按出現次數排序，不刪除重複元素：2,2,2,4,4,5,3,1 按出現次數排序，刪除重複元素：2,4,5,3,1
This web site really has all the info I needed about this subject and didn’t know who to ask.
Thank you, I’ve recently been looking for information approximately this
topic for a while and yours is the best I’ve found out till now.
However, what about the bottom line? Are you sure in regards to the source?
Simply desire to say your article is as astounding. The clarity in your post is just excellent and i can assume you are an expert on this subject.
Fine with your permission let me to grab your RSS feed to keep
up to date with forthcoming post. Thanks a million and please keep up the
rewarding work.
Auf der Berliner Maker Faire fiel im Oktober 2016 mit einem Hackathon der Startschuss für “Made for my Wheelchair”.
Hier trafen Rollstuhlfahrer auf Techniker und Designer, um gemeinsam, aber nutzerzentriert Ideen für Add-ons zu sammeln, die
das Leben mit dem Rollstuhl einfacher machen. Als
inhaltliche Schwerpunkte wurden nach der Ideenfindung Transport und Stauraum, Fahren im Schnee und Beleuchtung ausgewählt, um mehr Sicherheit und Mobilität bei schwierigen Verkehrsverhältnissen zu ermöglichen. Zu den getesteten Produkten zählten weiters Schneeketten, LED-Leuchten und Anhänger.
Da die fertigen Anleitungen mit möglichst geringem finanziellen und zeitlichen Aufwand umgesetzt und angepasst werden sollen, setzten sich
schließlich die Beleuchtung (Open Lights) und der Anhänger (Open Trailer) bei den Projektteilnehmern durch.
Darauffolgend wurden die Projekte in mehreren Workshops
ausprobiert und überarbeitet, während das Fablab Berlin jeweils die
Herstellung der Prototypen übernahm. Dabei Anhänger am Rollstuhl wird es einfacher,
eine Begleitung oder schwere, unhandliche Dinge zu transportieren. Die
Lichter verursachen mehr Sichtbarkeit im Straßenverkehr.
Basierend auf Adafruits Neopixeln und dem Mikrocontroller Trinket lässt sich die LED-Leuchte individuell programmieren und erweitern. Im Projekt wurden zwei Designs entwickelt: ein Streifen, der als Front-
und Unterbodenbeleuchtung angebracht wird, sowie ein Ring
als Rückleuchte.
You actually make it seem so easy with your presentation but I find this topic to be really something that I think
I would never understand. It seems too complicated and extremely broad for me.
I’m looking forward for your next post, I’ll try to get the hang of it!
Hi there mates, its great paragraph concerning teachingand entirely explained,
keep it up all the time.
It’s enormous that you are getting ideas from this paragraph
as well as from our dialogue made at this place.
Genuinely when someone doesn’t be aware of afterward its
up to other people that they will help, so here it happens.
Write more, thats all I have to say. Literally, it seems as though
you relied on the video to make your point. You clearly know what youre talking about,
why throw away your intelligence on just posting videos
to your blog when you could be giving us something enlightening to
read?
Howdy I am so grateful I found your website, I really found you by error, while I was researching on Google for something
else, Anyhow I am here now and would just like to say thanks for a tremendous post and a all round entertaining
blog (I also love the theme/design), I don’t have time to look over it
all at the moment but I have book-marked it and also included your RSS feeds, so when I have time I
will be back to read a lot more, Please do keep up the fantastic work.
Today, I went to the beach with my children. I found a sea shell and gave it to
my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She placed the shell to her ear and screamed.
There was a hermit crab inside and it pinched her ear.
She never wants to go back! LoL I know this is totally off topic but I had to tell someone!
Welche SEO-Tools nehmen wir, wo ist auch die Datenbasis gut?
Damit beschäftigst du dich ja ganz gleich. Auf was greifen diese Tools eigentlich
zurück? Liefern die brauchbare Ergebnisse und,
ja, können wir da systematisch Keywords für recherchieren und
aufarbeiten? Ist sehr wichtig bei der Tool-Auswahl, weil
die Tools eine unterschiedliche Datenbasis haben, u.U.,
in welchen Ländern man ist, ne. F: Genau. Also alleine als Beispiel
jetzt: Welchen Markt möchte ich bespielen? Und das ist natürlich schwierig zu
unterscheiden und zu differenzieren und da eine Auswahl zu treffen. Und die Tools kosten halt auch Geld, ne, nun gut ist auch oft eine Scheu da, dafür erstmal ein Budget frei erreichbar.
Auftreten Tools, die sind für den deutschen Raum total klasse, total super, aber viele Unternehmen sind halt international unterwegs und da braucht man andere Tools, die dann bessere Daten liefern. Also da ist viel Unsicherheit auch oft da,
ja. Genau, das ist das eine. Man weiß auch noch um kein Haar
genau, was das Tool einem dann bringt. Aber aus diesen Keywords entwickelt sich dann ja auch eine Architektur für die Webseite, oder?
If you would like to take a great deal from this paragraph then you
have to apply such strategies to your won blog.
I’m more than happy to uncover this website.
I wanted to thank you for ones time for this fantastic read!!
I definitely liked every part of it and i also have you saved to fav
to look at new information in your website.
Everyone loves it whenever people get together and share views.
Great blog, stick with it!
I am not sure where you’re getting your info, but great topic.
I needs to spend some time learning more or understanding more.
Thanks for fantastic info I was looking for this info for my mission.
cheap cialis pills for sale https://www.tadalafilico.com/
Hi there every one, here every person is sharing these kinds
of familiarity, so it’s fastidious to read this web site, and I used to visit
this blog every day.
I am no longer positive where you’re getting your information, however good topic.
I needs to spend a while studying more or figuring out
more. Thank you for excellent information I was in search
of this information for my mission.
Your way of telling all in this post is in fact nice, every
one can simply know it, Thanks a lot.
you are in point of fact a good webmaster. The web site loading pace is amazing.
It kind of feels that you are doing any unique trick.
Furthermore, The contents are masterwork.
you have done a fantastic activity in this subject!
This is my first time pay a visit at here and i am genuinely impressed to read everthing at single place.
I’ve read several good stuff here. Definitely value bookmarking for revisiting.
I wonder how a lot attempt you set to make this sort of great
informative site.
We’re a group of volunteers and opening a new scheme in our community.
Your site provided us with valuable information to work on. You have
done an impressive job and our entire community will be thankful to you.
I constantly spent my half an hour to read this weblog’s articles or reviews every day along with a cup of coffee.
Hi everyone, it’s my first go to see at this website, and paragraph is really fruitful
in support of me, keep up posting these types of content.
Good day! I could have sworn I’ve been to this blog before but after checking through some of the
post I realized it’s new to me. Anyways, I’m definitely delighted I found it and I’ll be bookmarking and checking back frequently!
Howdy! Someone in my Myspace group shared
this website with us so I came to check it out.
I’m definitely loving the information. I’m bookmarking and will be tweeting this to
my followers! Fantastic blog and outstanding style and design.
Hello, its good paragraph regarding media print, we all understand media is a
enormous source of information.
I was pretty pleased to fin this web site. I need to to thank you for ones time for this fantastic
read!! I definitely enjoyed every bit of it and i also have you saved to fav tto look at new things on your website.