copy | 易学教程

Copy file permissions, but not files [closed]

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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 6 years ago . I have two copies of the same directory tree. They almost have the same files in both (one version may have a couple extra or missing files). However, most of the files are in common to both directories (have the same relative paths and everything). Assume these are in directories: version1/ version2/ The

Copy DOM element with its events in variable (jQuery)

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I wanted to copy DOM element in variable, so I did this: var before=$("#someid").html(); Then my script does a bunch of stuff in this "someid" DOM and after that is completed I restored DOM like it was before: $("#someid").html(before); This works ok but the problem is that I had some events in this DOM and those events can not be copied like this... So is there another way to do this? The clone() method can preserve both event handlers and element data. You can write: var $before = $("#someid").clone(true); Then later: $("#someid").replaceWith($before); 来源： https://stackoverflow.com/questions

How to copy SKSpriteNode with SKPhysicsBody?

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I am curious about a situation that I came across today when trying to unarchive and copy a SKSpriteNode from one SKScene to another. In the output from the playground below you can see that both linearDamping and angularDamping or not being maintained after the copy (they seem to be dropping back to default values) // PLAYGROUND_SW1.2 - SKSpriteNode Copy import UIKit import SpriteKit // ORIGINAL let spriteNode = SKSpriteNode() spriteNode.name = "HAPPY_NODE" let size = CGSize(width: 55.0, height: 150.0) let physics = SKPhysicsBody(rectangleOfSize: size) physics.linearDamping = 0.123 physics

How can I get the standard iPhone Copy bubble to appear on a UIImage?

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问题 In iPhoto, I can simply hold my finger over an image to get a "Copy" popup (like the popup you see in text boxes). In my UIImageView's, this is not the case. How can I enable it? 回答1: You can manually display the Cut / Copy / Paste menu using the UIMenuController class. For example, the following code will display the menu, centered on your image: [self becomeFirstResponder]; UIMenuController *copyMenuController = [UIMenuController sharedMenuController]; [copyMenuController setTargetRect

Python ctypes: copying Structure's contents

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I want to mimic a piece of C code in Python with ctypes, the code is something like: typedef struct { int x; int y; } point; void copy_point(point *a, point *b) { *a = *b; } in ctypes it's not possible to do the following: from ctypes import * class Point(Structure): _fields_ = [("x", c_int),("y", c_int)] def copy_point(a, b): a.contents = b.contents p0 = pointer(Point()) p1 = pointer(Point()) copy_point(p0,p1) as the contents still is a Python ctypes Structure object, that is managed as a reference itself. An obvious workaround would be to manually copy each field (that is represented as

How can one detect copying a link in a browser?

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Yesterday I had a chat with a taxi driver and upon mentioning that I am a programmer, he told me that a couple of days earlier he had experienced the following: upon trying to copy the URL from the address bar of his browser, a messagebox appeared with a message like "Please don't copy this link, rather register" . I am not a web developer, so this might be a lame question :-) but I wonder how such a thing is accomplished? What technology or language gives one this level of control over the events within the browser? The site was some sort of a movie downloading service, as far as I understood

What's the difference between cloning and copying a git repo?

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问题 The same question exists for mercurial, and I'm wondering how this applies to git? In particular, I'm interested in cases where there are two local repos, and copying between servers using rsync or such. Also, if the original repo is itself cloned from, say gitorious, and I copy it, then gitorious will still exist as a remote (tracked by the master branch) in the copy, right? Does this happen if the copy is cloned instead? 回答1: Cloning a repository gives you a copy of that repository and

The correct COPY command to load postgreSQL data from csv file that has single-quoted data?

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I have csv file that has contents like this: 10,53073,0,0,'Y','2008-05-30 21:46:55',0,'2008-05-30 21:48:04',0,53071,2 I want to load the csv data into my_table. CREATE TABLE my_table ( ad_tree_id numeric(10,0) NOT NULL, node_id numeric(10,0) NOT NULL, ad_client_id numeric(10,0) NOT NULL, ad_org_id numeric(10,0) NOT NULL, isactive character(1) NOT NULL DEFAULT 'Y'::bpchar, created timestamp without time zone NOT NULL DEFAULT now(), createdby numeric(10,0) NOT NULL, updated timestamp without time zone NOT NULL DEFAULT now(), updatedby numeric(10,0) NOT NULL, parent_id numeric(10,0), seqno

How can i clone an image in javascript

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I'm trying to clone an image in javascript, bud without loading a new one. Normally new browsers will load an image once and there are several ways to use that image again. The problem is that when I test it in IE 6 the image will request a new image from the server. Anyone how has some info on how to do this in older browsers? 3 methods that not work: <html> <head> <title>My Image Cloning</title> <script type="text/javascript"> sourceImage = new Image(); sourceImage.src = "myImage.png"; function cloneImageA () { imageA = new Image(); imageA.src = sourceImage.src; document.getElementById(

Copying a column from one DataFrame to another gives NaN values?

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问题 This question has been asked so many times, and it seemed to work for others, however, I am getting NaN values when I copy a column from a different DataFrame( df1 and df2 are same length). df1 date hour var1 a 2017-05-01 00:00:00 456585 b 2017-05-01 01:00:00 899875 c 2017-05-01 02:00:00 569566 d 2017-05-01 03:00:00 458756 e 2017-05-01 04:00:00 231458 f 2017-05-01 05:00:00 986545 df2 MyVar1 MyVar2 0 6169.719338 3688.045368 1 5861.148007 3152.238704 2 5797.053347 2700.469871 3 5779.102340 2730