concatenation

Append an array to another array in JavaScript [duplicate]

由 筅森魡賤 提交于 2019-12-03 03:23:06
问题 This question already has answers here : Closed 7 years ago . This question is an exact duplicate of: How to append an array to an existing JavaScript Array? How do you append an array to another array in JavaScript? Other ways that a person might word this question: Add an array to another Concat / Concatenate arrays Extend an array with another array Put the contents of one array into another array I spent some time looking for the answer to this question. Sometimes the simplest ones like

How can you concatenate two huge files with very little spare disk space? [closed]

由 北城余情 提交于 2019-12-03 03:08:42
Closed. This question is off-topic. It is not currently accepting answers. Learn more . Want to improve this question? Update the question so it's on-topic for Stack Overflow. Suppose that you have two huge files (several GB) that you want to concatenate together, but that you have very little spare disk space (let's say a couple hundred MB). That is, given file1 and file2 , you want to end up with a single file which is the result of concatenating file1 and file2 together byte-for-byte, and delete the original files. You can't do the obvious cat file2 >> file1; rm file2 , since in between the

Reversing a List in Prolog

由 心已入冬 提交于 2019-12-03 02:58:53
I have finished a homework assignment for my programming class. I was supposed to create a Prolog program that reverses a list. I, however, am having trouble understanding why exactly it works. %1. reverse a list %[a,b,c]->[c,b,a] %reverse(list, rev_List). reverse([],[]). %reverse of empty is empty - base case reverse([H|T], RevList):- reverse(T, RevT), conc(RevT, [H], RevList). %concatenation What exactly is RevT in this case? I know it is supposed to represent the reverse of T or the rest of the given list, but I don't see how it could have any value as I haven't assigned it to anything.

Understanding the syntax of numpy.r_() concatenation

由 纵饮孤独 提交于 2019-12-03 01:58:53
I read the following in the numpy documentation for the function r_ : A string integer specifies which axis to stack multiple comma separated arrays along. A string of two comma-separated integers allows indication of the minimum number of dimensions to force each entry into as the second integer (the axis to concatenate along is still the first integer). and they give this example: >>> np.r_['0,2', [1,2,3], [4,5,6]] # concatenate along first axis, dim>=2 array([[1, 2, 3], [4, 5, 6]]) I don't follow, what does exactly the string '0,2' instruct numpy to do? Other than the link above, is there

Concatenate JSONArrays

由 て烟熏妆下的殇ゞ 提交于 2019-12-03 01:22:01
I am using JSONArray under the org.json Package. My first JSONArray is like: [["249404","VPR249404"],["249403","VPR249403"],["249391","M249391"]] and Second [["249386","M249386"],["249385","M249385(I)"],["249384","I249384"]] So I'd like to append new JSONArray to my first JSONArray. I am working on Java and Android. I have heard about google-gson library, but I don't know whether it can help me or not but I don't want any other dependency in my Android Application. I would try something like this: private JSONArray concatArray(JSONArray arr1, JSONArray arr2) throws JSONException { JSONArray

Combining multiple bash parameter substitutions within same variable set line without using any other commands [closed]

由 帅比萌擦擦* 提交于 2019-12-03 01:21:58
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . Example of what I want to combine: sVar=$(whoami) sVar=${sVar^} sVar=${sVar::1} Output: Uppercase first character of username Requirements: One-liner Do the rest of the processing with parameter substitutions except for the initial command substitution above $(whoami) I realize

Need to combine lots of files in a directory

由 隐身守侯 提交于 2019-12-03 00:29:47
问题 I've got 50 to 60 files in a directory that I need to concatenate into a single file on a regular basis. I thought about using notepad++ thinking there was probably a plug-in that would help but haven't been able to find one. Any other thoughts? 回答1: Assuming these are text files (since you are using notepad++) and that you are on Windows, you could fashion a simple batch script to concatenate them together. For example, in the directory with all the text files, execute the following: for %f

format date as mm/dd/yyyy text

由 試著忘記壹切 提交于 2019-12-02 23:53:03
问题 Once a date in the "mm/dd/yyyy" format has been concatenated with a space and with text (e.g. "05/03/2015 Summary Report"), how could you copy this concatenated cell into another cell AS TEXT, but without the date turning into "42127 Summary Report?" 回答1: =CONCATENATE(TEXT(A1,"mm/dd/yyyy")," Summary Report") Where A1 is your cell with the date. 来源： https://stackoverflow.com/questions/30032963/format-date-as-mm-dd-yyyy-text

What is reason for syntax error of print statement of given python code [closed]

由 流过昼夜 提交于 2019-12-02 23:52:02
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . xString = input("Enter a number: ") x = int(xString) yString = input("Enter a second number: ") y = int(yString) print('The sum of ', x, ' and ', y, ' is ', x+y, '.', sep='') on executing above code, interpretor throwing syntax error saying syntax error as below. print(?The sum of ?, x, ? and ?, y, ? is ?, sum,

Form a large matrix from n numbers of small matrices

由 自作多情 提交于 2019-12-02 22:45:02
问题 I am a new to MATLAB. I have generated n smaller matrices of numbers, say 3 x 1 by using a FOR loop. All the matrices are having random values like so: m1 = [3;2;1]; m2 = [5;1;6]; m3 = [0.2;0.8;7] m4 = [8;3;0] m5 = [3;7;6] m6 = [8;2;1.3]. Now I want to concatenate all the values into a larger matrix M such that M can be represented like this: M = [m1 m2 m3; m4 m5 m6] So that the output of M shall be: M = [3 5 0.2; 2 1 0.8; 1 6 7; 8 3 8; 3 7 2; 0 6 1.3]; How do I initialize that by using a FOR
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