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): 由 翻译 强力驱动 问题: I'm experiencing odd behavior with json_encode after removing a numeric array key with unset . The following code should make the problem clear. I've run it from both the CLI and as an Apache mod: PHP version info: C : \Users\usr\Desktop > php - v PHP 5.3 . 1 ( cli ) ( built : Nov 20 2009 17 : 26 : 32 ) Copyright ( c ) 1997 - 2009 The PHP Group Zend Engine v2 . 3.0 , Copyright ( c ) 1998 - 2009 Zend Technologies PHP Code <? php $a = array ( new stdclass , new stdclass , new stdclass ); $a [ 0 ]-> abc = '123' ; $a [ 1 ]-> jkl = '234

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 have a Pandas DF where I need to filter out some rows that contains values == 0 for feature 'a' and feature 'b'. In order to inspect the values, I run the following: DF1 = DF[DF['a'] == 0] Which returns the right values. Similarly, by doing this: DF2 = DF[DF['b'] == 0] I can see the 0 values for feature 'b'. However, if I try to combine these 2 in a single line of code using the OR operand: DF3 = DF[DF['a'] == 0 | DF['b'] == 0] I get this: TypeError: cannot compare a dtyped [float64] array with a scalar of type [bool] What's happening here

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 working with a bunch of large numpy arrays, and as these started to chew up too much memory lately, I wanted to replace them with numpy.memmap instances. The problem is, now and then I have to resize the arrays, and I'd preferably do that inplace. This worked quite well with ordinary arrays, but trying that on memmaps complains, that the data might be shared, and even disabling the refcheck does not help. a = np.arange(10) a.resize(20) a >>> array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) a = np.memmap('bla.bin',

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 have basic 2-D numpy arrays and I'd like to "downsample" them to a more coarse resolution. Is there a simple numpy or scipy module that can easily do this? I should also note that this array is being displayed geographically via Basemap modules. SAMPLE: 回答1: scikit-image has implemented a working version of downsampling here, although they shy away from calling it downsampling for it not being a downsampling in terms of DSP, if I understand correctly: http://scikit-image.org/docs/dev/api/skimage.measure.html#skimage.measure.block_reduce

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: Consider the following code: class AA { } class BB extends AA { } public class Testing { public static void main ( String [] args ) { BB [] arr = new BB [ 10 ]; AA [] arr2 = arr ; BB b = new BB (); AA a = new AA (); arr2 [ 0 ] = a ; // ArrayStoreException at runtime arr2 [ 1 ] = b ; List < BB > listBB = new ArrayList <>(); List listAA = listBB ; listAA . add ( "hello world.txt" ); } } In the above example, I get the ArrayStoreException when I try arr2[0] = a . That means the array remembers what type it must accept. But the List

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 would like to be able to use javascript to find every id (or name) for every object in an html document so that they can be printed at the bottom of the page. To understand more fully what I'm trying to accomplish, let me explain. I build large forms from time to time for things such as property applications, rental listings, detailed medical website user registration forms and such. As I do it now, I build the form, assign the id's and names and decide which values are required and such. Then when I build the php form validation and

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: Building websockets app based off of actioncable-examples. When starting server, running rake, etc. I keep getting the message: Array values in the parameter to `Gem.paths=` are deprecated. Haven't seen a solution here, but did find one. I wanted to post the question and answer here so that it's available. 回答1: I found the answer in RubyGems issue #1551 here . The binstubs, the files in the bin folder, need to be updated. The best way to do this is: bundle update spring bundle exec spring binstub --remove --all bundle exec spring binstub -

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: When writing a project, I ran into a strange issue. This is the minimal code I managed to write to recreate the issue. I am intentionally storing an actual string in the place of something else, with enough space allocated. // #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> #include <stddef.h> // For offsetof() typedef struct _pack{ // The type of `c` doesn't matter as long as it's inside of a struct. int64_t c; } pack; int main(){ pack *p; char str[9] = "aaaaaaaa"; // Input size_t len = offsetof(pack, c) +

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 have the following which works well: def steps %w[hello billing confirmation] end steps.first But I want to do this: def step_title %w['Upload a photo' 'Billing Info' 'Confirmation Screen'] end steps.first How does %w allow for that? I tried a google search but google is weak with these types of characters. Thanks 回答1: %w creates an "array of words," and uses whitespace to separate each value. Since you want to separate on another value (in this case, whitespace outside sets of quotation marks), just use a standard array: ['Upload a photo'

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 writing 2 functions in matlab, an initialize function and a function to insert items into an array treating it like a doubly-linked list. However, my initialize function only returns "ans =" and the initialized array. How can I have it also set values of my other variables? Here's my code: function [ array, listp, freep ] = initialize( size ) array = zeros(size, 3); listp = 0; freep = 1; end 回答1: Matlab allows you to return multiple values as well as receive them inline. When you call it, receive individual variables inline: [array,