clone

How to create a “clone”-able enumerator for external iteration?

由 梦想的初衷 提交于 2020-08-07 05:35:00
问题 I want to create an enumerator for external iteration via next that is clone -able, so that the clone retains the current enumeration state. As an example, let's say I have a method that returns an enumerator which yields square numbers: def square_numbers return enum_for(__method__) unless block_given? n = d = 1 loop do yield n d += 2 n += d end end square_numbers.take(10) #=> [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] And I want to enumerate the first 5 square numbers, and for each value, print

How to clone or copy a set in Python?

由 こ雲淡風輕ζ 提交于 2020-07-15 10:06:13
问题 For copying a list: shallow_copy_of_list = old_list[:] . For copying a dict: shallow_copy_of_dict = dict(old_dict) . But for a set , I was worried that a similar thing wouldn't work, because saying new_set = set(old_set) would give a set of a set? But it does work. So I'm posting the question and answer here for reference. In case anyone else has the same confusion. 回答1: Both of these will give a duplicate of a set: shallow_copy_of_set = set(old_set) Or: shallow_copy_of_set = old_set.copy()

How to clone github repo using node.js

由 [亡魂溺海] 提交于 2020-07-06 19:51:26
问题 I need a reliable way to clone a github repo and paste it into a local directory using node.js and any necessary npm packages. This code is using the nodegit library and doesn't work to clone a github repo. it creates a single folder named .git and copies none of the files from the repo. I have tried several libraries most of which have extremely complicated code or don't work. This was working before but now isn't. (it goes on and off as it pleases). pls help, I need a reliable code that

git submodule update --init --recursive hangs

由 末鹿安然 提交于 2020-06-24 11:25:07
问题 When I type git submodule update --init --recursive in order to recursively cloned submodules, it starts to say cloning... and then proceeds to do nothing... just hangs. One apparent fix is getting the paths and repos from the .gitmodule files, navigation to the path they prescribe, and git clone them each manually. Another apparent fix is Cntr-Z to break the action, delete the .git files that are produced by the --init clause, and trying again. It seemly works. I seem to have a broken result

git clone changes file modification time

由 大城市里の小女人 提交于 2020-06-24 07:02:48
问题 When I clone a git repository using " git clone ... " command all cloned files in my local repository have the same modification time with date and time when git clone command was issued. Is there a way to clone remote git repository with actual modification time for each file ? 回答1: Git does not record timestamp for the files, since it is a Distributed VCS (meaning the time on your computer can be different from mine: there is no "central" notion of time and date) The official argument for

Why does java.lang.Cloneable not override the clone() method in java.lang.Object?

由 ℡╲_俬逩灬. 提交于 2020-05-12 16:57:59
问题 The Java specification for the java.lang.Cloneable interface defines itself as signifying that any object that extends it also has implemented the clone() method that rests dormant within java.lang.Object . Specifically, it says that: A class implements the Cloneable interface to indicate to the java.lang.Object#clone() method that it is legal for that method to make a field-for-field copy of instances of that class. To me, this means that it should be assumed that every class that extends

Why does java.lang.Cloneable not override the clone() method in java.lang.Object?

由 本秂侑毒 提交于 2020-05-12 16:57:09
问题 The Java specification for the java.lang.Cloneable interface defines itself as signifying that any object that extends it also has implemented the clone() method that rests dormant within java.lang.Object . Specifically, it says that: A class implements the Cloneable interface to indicate to the java.lang.Object#clone() method that it is legal for that method to make a field-for-field copy of instances of that class. To me, this means that it should be assumed that every class that extends

spawn & drag of SVG elements - approach

由 你。 提交于 2020-05-12 07:12:42
问题 I am on my learning curve for Javascript/SVG combo (animating and making interactive SVGs). I wanted to create a code snippet where menu elements ("inventory") can be dragged over to the main screen ("canvas") while the originating element would remain in its place (as if one would move a copy of it off the original element). Here I crafted the code snippet as best as I could: http://codepen.io/cmer41k/pen/f2b5eea274cdde29b0b2dc8a2424a645 So I sort of managed to do something but its buggy: I

jQuery dynamic added select

由 风流意气都作罢 提交于 2020-04-21 04:36:16
问题 When I add a select dynamic to a DIV via clone, I'm not able to select anything from the new dropdown, any ideas why? $(".inline-form .copyIng:first-child").clone().appendTo(".inline-form"); See this : http://jsfiddle.net/rxwL6/ .trigger("refresh"); Dosen't change anything, I still can't select anything from the new dropdown. 回答1: Problem is that you are cloning html content that has already been 'enhanced' by jQM and not the original markup. Therefore jQM does not know how to create or

Java Object对象之clone方法

由 半腔热情 提交于 2020-03-27 18:16:47
3 月，跳不动了？>>> 克隆的步骤： 创建一个对象 将原有对象的数据导入到新创建的数据中 1. Object的clone()源代码简介 /** * Creates and returns a copy of this {@code Object}. The default * implementation returns a so-called "shallow" copy: It creates a new * instance of the same class and then copies the field values (including * object references) from this instance to the new instance. A "deep" copy, * in contrast, would also recursively clone nested objects. A subclass that * needs to implement this kind of cloning should call {@code super.clone()} * to create the new instance and then create deep copies of the nested, * mutable objects.
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