Ruby Hash coolness September 28th, 2009
Don’t shoot me if you already use this every day, but this is new to me.
In the past I’ve often had code like this
@hosts = {} @accounts.each do |account| @hosts[account[:host]] ||= [] @hosts[account[:host]] << account end
But why do this hen you can just add some initializer code to your hash.
@hosts = Hash.new { |h, k| h[k] = [] } @accounts.each do |account| @hosts[account[:host]] << account end
Where Hash automatically invokes the block when an unknown hash key is called. Great!
l
Seems to be the same as Hash.new([]) ;)
@grosser: It most definitely is not the same thing as Hash.new([]). When you do that, every value will share the exact same Array object. That means if you did: hash[:foo] << 1; hash[:bar] << 2, and then looked at hash[:foo] you’d get [ 1, 2 ]. Same thing if you looked at hash[:bar]. Modifying either of those will also affect the other.
i tried to my server but in localhost with wamp and something went wrong. the tips i forgot the crul php service ;-)) good to know
Thanks Dann, i also thought just like Grosser that it looks to be the same. I tried it and it worked nice.
The Hash is automatically removed with this method. I think is the most simple one. Am I wrong ?
Thanks for this info! I’ve been looking for that for a long time. Cheers!
i tried to my server but in localhost with wamp and something went wrong. the tips i forgot the crul php service ;-)) good to know is pneumonia contagious df Pneumonia Symptoms
This is a good post. This post gives truly quality information. IˇŻm definitely going to look into it. Really very useful tips are provided here. thank you so much. Keep up the good work Minoterie pour farine
SEO India Delhi Offer Reputation Management and Best SEO PPC Services Delhi, Best SEO Packages Call Me 9810267070, Search Engine Optimization India, Search Engine Marketing Delhi, Outsourcing SEO India, SEO Companies in India.
Thanks for this blog about ruby, not easy to find good info regarding this subject!
I haven’t tried that before, it really helped me out!
typography and hand drawing. Also magazine layout is good at some times.
That means if you did: hash[:foo] << 1; hash[:bar] << 2, and then looked at hash[:foo] you’d get [ 1, 2 ]. Same thing if you looked at hash[:bar]. Modifying either of those will also affect the other. Bilverkstäder, verkstäder i växjö.
thanks for sharing such a nice blog.i really need it. good work keep it up!!!!
Thanks Dann, i also thought just like Grosser that it looks to be the same. I tried it and it worked nice.
Thanks for sharing this wonderful code. 31 day fat loss cure review
I believe that natural and organic sources of vitamins and minerals are the best in comparison of any other packaged and plastic products. Always try to grow the stuff you need at your home. It is not only going to be cheaper but it will be a lot more beneficial for your health and your loved ones
Nice article, very informative…best regards…
Informative and interesting. Best regards.
Can you suggest a good web hosting provider at a honest price? Thank you, I appreciate it!
It is not only going to be cheaper but it will be a lot more beneficial for your health and your loved ones..!!
Thanks for providing such useful information. I really appreciate your professional approach. I would like to thank you for the efforts you made in writing this post. I like the way you start and then conclude your thoughts.Thanks for taking the time to discuss this,would you mind updating your blog with more information? It is extremely helpful for me.I am hoping the same best work from you in the future as well.
Thanks for Sharing Your Knowledge
nice posting
Thanks for sharing this wonderful code.looking for that for a long time
very nice informative posting
Thanks for the beautiful code. Love it
lovely work and much success in your business pains! significantly, the article is in reality the sweetest on this costly topic.
so very nice code..
Programming isn’t my strong point so posts on Ruby are very helpful to me. I don’t find that there are many out and about there on the Internet
I was searching around the internet and came across your blogs, great articles. I really enjoy reading them, keep up the great work!
I think most of the peoples are likes your information because lots good comments are present here and i am also get good knowledge. so thanks for your wonderful sharing.
It is proven time and time again that information’s worth is not the main factor which impacts article promotion results. Instead, the degree at which you manage to broadcast information as speedily as possible. And I’m not referring to article distribution, but to the fluency of your writing.
Hi I believe this is a great article I will definetely keep up reading your works, well done. It is very important to have quality contents in the web, we can use them as a reliable source for our projects.
ubmitted with values for all those fields, then a text-only site viewing mode might serve the text-only version of the ad while the banner would otherwise be served.
Fantastic goods from you, man. Ive study your stuff ahead of and you’re just as well amazing. I enjoy what you’ve got right here, adore what you’re stating and the way you say it. You make it entertaining and you even now manage to help keep it wise. I cant wait to go through additional from you.
To me, you are doing the great work. Carry on this. work at home In the end, I would like to thank you for making such a nice website
I appreciated your expert manner of writing this article. You haveve created it simple for me to recognize. Please keep up the good articles.
Nice to be there you have done great work I appreciate you for this one. Mobile Phones For Sale
I really don’t have words to describe how much I liked this article of yours. The author really know his job well. Thanks for this wonderful share. power scooters
this is nice blog to post color diamonds
I appreciated your expert manner of writing this article. You haveve created it simple for me to recognize. Please keep up the good articles.
Run this unchewable of morality is rale someone symptom for, affirmatory senescent for readers and a depletable for you as meliorate definitely supplying the aboveground of the illustrator. It’s lately to earthbound these kinds of articles around to prototypical the noesis tensed deportment. Use those who theoretic can handwork things aright in the deafened secernment! softwarewe
Computer forensics is the practice of collecting, analysing and reporting on digital information in a way that is legally admissible. It can be used in the detection and prevention of crime and in any dispute where evidence is stored digitally. Computer forensics has comparable examination stages to other forensic disciplines and faces similar issues.
Deffo helped me out!
I’m php programmer but I studies about Ruby now.thanks for your tips.
This programming info is very useful, thanks!
I have worked with some Hash before but it really never worked until I saw this. I really appreciate that you shared this to us.
I am always reading about programming forums, blogs, news and all. Really i am sooo lucky to find this blog. Nice blog,,, Keep it up your work.
Just to say thanks, very clear and interesting :) Looking forward to your next one..
This is my first time I visit here, looking for this code for a long time. Finally I found here and it worked nice. Thanks to share this code
Nice article, very informative
Thank you for sharing this valuable information with us. I will keep visiting you post again and again. I hope to get some new ideas in comming days. Thanks!!!
I love your way of writing this article. You have created it simple for me to recognize. Please keep up the good articles. Web Design Companies
I love your way of writing this article. You have created it simple for me to recognize. Please keep up the good articles. Web Design Companies
India retailing is a path-breaking interface portal. Addressed and directed towards the retailing community across the world, the portal provides a wide-angle view and analysis of the business of retail in India.
At images franchise you can learn on how to make the right franchise decision, how to identify the right franchise opportunity that can make you a successful business owner.
I believe that natural and organic waterhouse friderichsen syndrome sources of vitamins and minerals are the best in comparison of any other packaged and plastic products. Always try to grow the stuff you need at your home. It is not only going to be cheaper but it will be a lot more beneficial for your health and your loved ones
I had worked with many Hash just before but it really for no reason performed until finally That i experienced this. I take pleasure in which you common this unique for you to us. warcraft three cheats I appreciate the actual important information one supply in your articles and reviews. Let me book mark your site in addition to go here usually.
I had worked with many Hash just before but it really for no reason performed until finally That i experienced this. I take pleasure in which you common this unique for you to us. warcraft three cheats I appreciate the actual important information one supply in your articles and reviews. Let me book mark your site in addition to go here usually.
Hello.. This is my first time i visit here. I found so many entertaining stuff in your blog, especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the enjoyment here! Keep up the good work…
Good one really appreciated
Thank you for sharing this valuable information with us. I will keep visiting you post again and again. I hope to get some new ideas in comming days. Thanks!!
I’m not going to lie, I’m really impressed. Its rare for me to find something on the internet that’s as entertaining and intriguing as what you’ve got here. Your page is sweet, your graphics are great, and what’s more, you use videos that are relevant to what you’re saying.
Your Accountant’s Office, LLC. was formed to assist small to medium sized businesses and individuals with all of their bookkeeping, accounting, tax, and business start-up needs. We offer full service assistance at local firm prices, with a down home feel.
I found so many entertaining stuff in your blog, especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the enjoyment here! Keep up the good work….
Nice info, Useful for my job…this has made my life (my projects) goes a lot easier. Keep up the good work, thanks very much…