partial

Workaround in mysql for partial Index or filtered Index?

假如想象 提交于 2019-12-01 14:41:01
问题 I am using mysql db. I know postgresql and SQL server supports partial Indexing. In my case I want to do something like this: CREATE UNIQUE INDEX myIndex ON myTable (myColumn) where myColumn <> 'myText' I want to create a unique constraint but it should allow duplicates if it is a particular text. I couldn't find a direct way to do this in mysql. But, is there a workaround to achieve it? 回答1: I suppose there is only one way to achieve it. You can add another column to your table, create index

Python - Convert partial sublist's elements into int

眉间皱痕 提交于 2019-12-01 13:02:09
Suppose you have a list like: [["a", "1", "2", "3"], ["b", "4", "5", "6"], ["c", "7", "8", "9"]] And I want to convert the elements from index 1 to 2 of every sublist into integers as you can see they are themselves strings. Is it possible? If it is, then what is the shortest way to do it? What have I done uptil now is this: lists = [["a", "1", "2", "3"], ["b", "4", "5", "6"], ["c", "7", "8", "9"]] for l in lists: l[1:4] = [int(x) for x in l[1:4]] print(lists) If you want to convert the lists inplace, your code is good enough. BTW, the list comprehension can be replaced with map : l[1:4] = map

Python - Convert partial sublist's elements into int

ぐ巨炮叔叔 提交于 2019-12-01 11:40:21
问题 Suppose you have a list like: [["a", "1", "2", "3"], ["b", "4", "5", "6"], ["c", "7", "8", "9"]] And I want to convert the elements from index 1 to 2 of every sublist into integers as you can see they are themselves strings. Is it possible? If it is, then what is the shortest way to do it? What have I done uptil now is this: lists = [["a", "1", "2", "3"], ["b", "4", "5", "6"], ["c", "7", "8", "9"]] for l in lists: l[1:4] = [int(x) for x in l[1:4]] print(lists) 回答1: If you want to convert the

Find variables in base Workspace with partial string match (Matlab)

最后都变了- 提交于 2019-12-01 11:28:13
I'd like to know how to find a variable in the base MATLAB Workspace by entering only a part of its name. I have a long list of variables & I don't know the exact variable name. Is there a function that compares/matches character order in a list of variable strings? Thanks, You can use who to obtain a list of all variable names currently in your workspace. From there, you can use regexpi to do a case insensitive regular expression lookup to find those variables that match your query. Something like: namesWorkspace = who; outStr = regexpi(namesWorkspace, 'nameOfVariable'); ind = ~cellfun(

Decode part of JPEG file

十年热恋 提交于 2019-12-01 08:08:11
I'm trying to load part of big JPEG file (hundreds of megapixels) with a limited memory footprint. I need only about a 1000 scanlines of 20000. It seems that current implementation of libjpeg (as well as its fork libjpeg-turbo) doesn't provide a way to skip unneeded 19k scanlines without decoding them. Is there a workaround for it without digging into libjpeg internals? Partial JPEG decoding was implemented in jpeglib-turbo one year ago. I didn't try it, but I guess it should work. Check it: Add further partial decoding optimization #34 You can't avoid having to decode the scan lines you want

jQuery ready event not fired on partial page load

戏子无情 提交于 2019-12-01 05:41:30
Here's the situ: A page which contains html and using the jQuery libray and tabs jQuery UI plugin loads another page when some tab is clicked. The problem is that when the page/html is loaded/rendered (let's simplify this and say it's just doing something like $("#myDiv").load(url);), the ready event is not fired because of course the "window" has already loaded and fired the load event. This means that none of the jQuery things I want to do on load (partial load) of the page are executed. The UI.tabs plugin is designed to load pages into other tabs and we can assume that other pages may

Rails: Show form from different model in a view

我怕爱的太早我们不能终老 提交于 2019-12-01 05:38:52
I have a location model and a post model. I want to allow the user to create new posts from the index page of the location model. How do I do that? I tried rendering the post new.html.erb as a partial in location index.html.erb , but this leads to errors as post new.html.erb references the @post variable. How should I accomplish this? Try something like this LocationController def index @location = Location.find(:all) @post = Post.new end Now ur location view would have access to the instance variable @post . Render a partial using that render :partial => 'posts/post', :object => @post You can

jQuery ready event not fired on partial page load

点点圈 提交于 2019-12-01 03:39:28
问题 Here's the situ: A page which contains html and using the jQuery libray and tabs jQuery UI plugin loads another page when some tab is clicked. The problem is that when the page/html is loaded/rendered (let's simplify this and say it's just doing something like $("#myDiv").load(url);), the ready event is not fired because of course the "window" has already loaded and fired the load event. This means that none of the jQuery things I want to do on load (partial load) of the page are executed.

Rails: Show form from different model in a view

浪子不回头ぞ 提交于 2019-12-01 02:22:19
问题 I have a location model and a post model. I want to allow the user to create new posts from the index page of the location model. How do I do that? I tried rendering the post new.html.erb as a partial in location index.html.erb , but this leads to errors as post new.html.erb references the @post variable. How should I accomplish this? 回答1: Try something like this LocationController def index @location = Location.find(:all) @post = Post.new end Now ur location view would have access to the

ASP.NET partial page upload without Updatepanel /With jQuery

北战南征 提交于 2019-12-01 01:58:01
I have an ASPX page .In the Top i am displaying 5 categories (Ex : Pen,Book,Shoe,Mobile,Mirror) When i click on any of the categories,I want to show the products under that category below the header. I dont want to reload the entire page for this.I want to maintain my page as it is (The header,footer and side panels would ) when a click happens except the center place of the image (may be a DIV or Table to show Product). Whats the best way to do this ?.I dont want to go for the ASP.NET Ajax update panel.I am already using jQuery in my project.So is there anyway to do this with jQuery ? Please