clone

How to create a modified copy of a File object in JavaScript?

由 可紊 提交于 2019-11-27 02:41:28
问题 Properties of files received from an <input type="file"> are read-only. For example, the following attempt to re-write file.name would either fail silently or throw TypeError: Cannot assign to read only property 'name' of object '#<File>' . <input onchange="onchange" type="file"> onchange = (event) => { const file = event.target.files[0]; file.name = 'foo'; } Attempting to create a copy via Object.assign({}, file) fails (creates an empty object). So how does one clone a File object? 回答1: My

git bash: error: RPC failed; result = 18, HTP code = 200B | 1KiB/s

由 拜拜、爱过 提交于 2019-11-27 01:51:30
问题 When I try to clone on git bash, I receive this error: $git clone <link> Cloning into 'name_project'... Password for '<link>': remote: Counting objects: 100% (659/659), done. error: RPC failed; result=18, HTTP code = 200B | 1 KiB/s fatal: The remote end hung up unexpectedly fatal: early EOF fatal: recursion detected in die handler This is the command used: git clone h(double t)ps://account@bitbucket.org/path.git Can anyone help? 回答1: Solution for failed with error: RPC failed; result=18, HTTP

Effective Java: Analysis of the clone() method

由 北战南征 提交于 2019-11-27 01:50:59
问题 Consider the following from Effective Java Item 11 (Override clone judiciously) where Josh Bloch is explaining what is wrong with the clone() contract . There are a number of problems with this contract. The provision that “no constructors are called” is too strong. A well-behaved clone method can call constructors to create objects internal to the clone under construction. If the class is final, clone can even return an object created by a constructor. Can someone explain what Josh Bloch is

Is there a method to clone an array in jQuery?

由 帅比萌擦擦* 提交于 2019-11-27 01:44:08
问题 This is my code : var a=[1,2,3] b=$.clone(a) alert(b) Doesn't jQuery have a 'clone' method? How can I clone an array using jQuery? 回答1: Just use Array.prototype.slice. a = [1]; b = a.slice(); JSFiddle - http://jsfiddle.net/neoswf/ebuk5/ 回答2: What about the jQuery.merge ? copy = $.merge([], a); 回答3: This is how i've done it : var newArray = JSON.parse(JSON.stringify(orgArray)); this will create a new deep copy not related to the first one (not a shallow copy). also this obviously will not

clear text field value in clone object

由 送分小仙女□ 提交于 2019-11-27 01:32:56
问题 I am having trouble to clear text field value created from jQuery clone function. I am just copying add_new_content content and appending that one with last add_new_content element.it works good.But in case, clicking add_new_box after enter some text in the text fields means. it clones with input value.but i want fresh text field. Mark up <div class="add_new_content"> <div class="add_new_box">ADD NEW</div> <input type="text" value="" /> </div> Script $(document).ready(function(){ $(".add_new

Cloning with generics

由 橙三吉。 提交于 2019-11-27 01:24:49
问题 Once upon a time there was a class: public class Scope<C extends Cloneable & Comparable<C>> implements Comparable<Scope<C>>, Cloneable, Serializable { private C starts; private C ends; ... @SuppressWarnings("unchecked") @Override public Object clone() { Scope<C> scope; try { scope = (Scope<C>) super.clone(); scope.setStarts((C) starts.clone()); // The method clone() from the type Object is not visible scope.setEnds((C) ends.clone()); // The method clone() from the type Object is not visible }

Symfony2/Doctrine: How to re-save an entity with a OneToMany as a cascading new row

由 雨燕双飞 提交于 2019-11-27 00:45:44
问题 Firstly, this question is similar to How to re-save the entity as another row in Doctrine 2 The difference is that I'm trying to save the data within an entity that has a OneToMany relationship. I'd like to re-save the entity as a new row in the parent entity (on the "one" side) and then as new rows in each subsequent child (on the "many" side). I've used a pretty simple example of a Classroom having many Pupils to keep it simple. So me might have ClassroomA with id=1 and it has 5 pupils (ids

How do I clone a generic List in Java?

由 不问归期 提交于 2019-11-27 00:15:42
I have an ArrayList<String> that I'd like to return a copy of. ArrayList has a clone method which has the following signature: public Object clone() After I call this method, how do I cast the returned Object back to ArrayList<String> ? ArrayList newArrayList = (ArrayList) oldArrayList.clone(); Why would you want to clone? Creating a new list usually makes more sense. List<String> strs; ... List<String> newStrs = new ArrayList<>(strs); Job done. GeRmAn This is the code I use for that: ArrayList copy = new ArrayList (original.size()); Collections.copy(copy, original); Hope is usefull for you

When I make a draggable clone and drop it in a droppable I cannot drag it again

由 有些话、适合烂在心里 提交于 2019-11-26 23:43:11
When I make a draggable clone and drop it in a droppable I cannot drag it again. How do I do that? Secondly I can only figure out how to us .append to add the clone to the droppable. But then it snaps to the top-left corner after any existing element and not the drop position. $(document).ready(function() { $("#container").droppable({ drop: function(event, ui) { $(this).append($(ui.draggable).clone()); } }); $(".product").draggable({ helper: 'clone' }); }); </script> <div id="container"> </div> <div id="products"> <img id="productid_1" src="images/pic1.jpg" class="product" alt="" title="" />

Cloning a record in rails, is it possible to clone associations and deep copy?

由 假如想象 提交于 2019-11-26 22:52:45
问题 I'm .clone -ing a record in rails... new_blerg = Blerg.find(1).clone This record has loads and loads of associations, and those associations even have associations. Is there a way to deep-copy a record and clone it so it is cloned with all of those associations too? 回答1: You may get some good use out of the Amoeba gem for ActiveRecord 3.2. It supports easy and automatic recursive duplication of has_one , has_many and has_and_belongs_to_many associations, field preprocessing and a highly
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