array

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: i'm getting the error Uncaught TypeError: Cannot set property '0' of undefined for some reason in this line world_map_array[i][z]="grass.gif|ongrass.gif|collision.gif|above.gif"; Why is this happening? thanks for any help var x_world_map_tiles = 100; var y_world_map_tiles = 100; var world_map_array = new Array(x_world_map_tiles); for (i=0; i 回答1: Arrays in JavaScript have quirks of their own that you may not be expecting if you come from other languages. Two important ones for your use case are: You cannot directly declare multidimension

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: For paginating a common array I got this solution, @arr_name = Kaminari.paginate_array(@arr_name).page(params[:page]).per(PER_PAGE_RECORDS) PER_PAGE_RECORDS is a variable with value as per needed for pagination. Any better Ideas?? Also to have an ajax call for using pagination one can use this, In your view, give id to your div tab div id="paginate" and inside it true %> And in js response file put, $('#paginate').html(' true).to_s) %>'); So your requests will be AJAX. Thanks. 回答1: This is the only available helper method to paginate an

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've found some interesting behaviour in PowerShell Arrays, namely, if I declare an array as: $array = @() And then try to add items to it using the $array.Add("item") method, I receive the following error: Exception calling "Add" with "1" argument(s): "Collection was of a fixed size." However, if I append items using $array += "item" , the item is accepted without a problem and the "fixed size" restriction doesn't seem to apply. Why is this? 回答1: When using the $array.Add() -method, you're trying to add the element into the existing array.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: As a new .NET 3.5 programmer, I started to learn LINQ and I found something pretty basic that I haven't noticed before: The book claims every array implements IEnumerable (obviously, otherwise we couldn't use LINQ to objects on arrays...). When I saw this, I thought to myself that I never really thought about that, and I asked myself what else all arrays implement - so I examined System.Array using the object browser (since it's the base class for every array in the CLR) and, to my surprise, it doesn't implement IEnumerable . So my question

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to know how to declare a two dimensional array in Python. arr = [[]] arr[0].append("aa1") arr[0].append("aa2") arr[1].append("bb1") arr[1].append("bb2") arr[1].append("bb3") The first two assignments work fine. But when I try to do, arr[1].append("bb1"), I get the following error, IndexError: list index out of range. Am I doing anything silly in trying to declare the 2-D array [edit]: but i do not know the no. of elements in the array (both rows and columns). 回答1: You do not "declare" arrays or anything else in python. You simply

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm trying to render a cube using an array of 8 vertices and an index-array of 24 (4 * 6) indices into the vertex array. But how can I specify per-face variables, like colors and normals without using deprecated functions? For this I need a separate set of indices, but when I specify two index-arrays ( GL_ELEMENT_ARRAY_BUFFERs ) and point them to different shader-variables (with two calls to glVertexAttribPointer) something goes wrong, and it doesn't render anything (but doesn't report any errors either - checked with glGetError).

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Using standard Python arrays, I can do the following: arr = [] arr . append ([ 1 , 2 , 3 ]) arr . append ([ 4 , 5 , 6 ]) # arr is now [[1,2,3],[4,5,6]] However, I cannot do the same thing in numpy. For example: arr = np . array ([]) arr = np . append ( arr , np . array ([ 1 , 2 , 3 ])) arr = np . append ( arr , np . array ([ 4 , 5 , 6 ])) # arr is now [1,2,3,4,5,6] I also looked into vstack , but when I use vstack on an empty array, I get: ValueError : all the input array dimensions except for the concatenation axis must match

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to create a JSON array using boost property trees. The documentation says: "JSON arrays are mapped to nodes. Each element is a child node with an empty name." So I'd like to create a property tree with empty names, then call write_json(...) to get the array out. However, the documentation doesn't tell me how to create unnamed child nodes. I tried ptree.add_child("", value) , but this yields: Assertion `!p.empty() && "Empty path not allowed for put_child."' failed The documentation doesn't seem to address this point, at least not

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: int i = 0 ; int min = x [ i ]; while ( i I've written the iterative form to find the min number of an array. But I'd like to write a function that with recursion. Please help! 回答1: Because this sounds like homework, here's a hint: The minimum value in an array is either the first element, or the minimum number in the rest of the array, whichever is smaller. 回答2: The minimum number of a single-element array is the one element in the array. The minimum number of an array with size > 1 is the minimum of the first element and the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I was wondering if someone could explain how to use will_paginate on an array of objects? For example, on my site I have an opinion section where users can rate the opinions. Here's a method I wrote to gather the users who have rated the opinion: def agree_list list = OpinionRating . find_all_by_opinion_id ( params [: id ]) @agree_list = [] list . each do | r | user = Profile . find ( r . profile_id ) @agree_list << user end end Thank you 回答1: will_paginate 3.0 is designed to take advantage of the new ActiveRecord::Relation in