move | 易学教程

Batch file to copy files from a file contents

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问题 I have a master file ( File1.txt ) where some names are maintained in the contents. I have to find all the files which has those kind of names (wild cards) in a folder and move them to a different folder using batch file program. Eg : File1.txt has contents abcd efgh now in the folder say c:\temp\Source i have files like 12abcd34.asc 56efgh78.asc testing.asc I have to move only those 2 files to a folder say c:\temp\Target. Here's my code, but it gives error saying i*.* is unexpected at this

How to move decimal?

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问题 In JavaScript, I want to define where the decimal place goes. I can only really show it in example. Lets say the input value is 1234 . I want the output to be 123.4 . Or, if the input is 12345 , I want the output to be 123.45 . Or, if the input is 123456 , I want the output to be 123.456 . You get the picture. To clarify, I just want three digits on the left side of the decimal. The total number of digits is unknown. So, how could this be done? 回答1: var n = 1234; var l = n.toString().length-3

Am I using std::move() too often?

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问题 I finally feel like I understand move semantics in Modern C++, and it's had a dramatic change on the way I write code. Right now, I'm working on an application that uses dependency injection and I'm incorporating my newfound knowledge of move semantics, but I end up using std::move() so much that I'm worried I'm using it incorrectly. Previously, if I wanted to inject a dependency that I needed a copy of in my object, I'd write my constructor like this: class NeedsCopyOfFoo { public:

Move construction from const reference

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问题 I have the following situation where I need to move construct t2 from t1. Unfortunately it is not possible to do that (constness violation I suppose) What is the right approach to handle that transparently from the caller of foo ? (ie. without requiring a passing by value and an explicit std::move) struct T { T() = default; ~T() = default; T(T&&) = default; }; T foo(const T& t) { T t3; if (predicate) return t3; else return std::move(t); } int main() { T t1; T t2 = foo(t1); return 0; } 回答1:

shutil.move deleted all my photos

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问题 for i in os.listdir(): if "jpeg" in i or "png" in i: shutil.move(os.path.join(os.getcwd(),i),"my photos") I wanted to move all photos to a folder called "my photos" which is not exist. It created a txt file called "my photos" but it is just 300 kb and when I quickview it it only shows one of my photo. So how can I get my photos back? where are they now? 回答1: I believe shutil.move simply took each file and interpreted "my photos" as the name to save each file as rather than a directory to copy

Extracting move only type from std::set

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问题 I have a std::set<std::unique_ptr<T>> and I'd like to move it to a std::vector<std::unique_ptr<T>> #include <set> #include <vector> #include <memory> class C {}; int main() { std::set<std::unique_ptr<const C>> s; std::vector<std::unique_ptr<const C>> v; std::move(s.begin(), s.end(), std::back_inserter(v)); } This gives the following error on VS2017: error C2280: 'std::unique_ptr>::unique_ptr(const std::unique_ptr<_Ty,std::default_delete<_Ty>> &)': attempting to reference a deleted function

Fn FnMut FnOnce以及move的区别

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There are three different "kinds" of closure in Rust, Fn, FnMut, and FnOnce, these differ in that their calling methods take &self, &mut self, and self respectively. This means that Fn closures have immutable access to their captures, FnMut get mutable access, and FnOnce can move out of their environment. As a result, Fns can be called through an & reference, FnMuts require an &mut reference, and FnOnce requires ownership. Since Iron calls Handlers with only an & reference, only Fn's can be used as Handlers. Sometimes Rust can infer the kind of a closure from its usage site, but in many cases

Windows batch script to move files

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问题 I need to move files from one directory to another in windows, and I need to write this in a batch script. We have written a SQL job where backup files will be created every 4 hours on the D: drive and last 4 backup files will be saved and others will be deleted. I need to write a batch script to move these files from the D: drive to the E: drive every 10 hours. Can anyone help me to write this script. 回答1: Create a file called MoveFiles.bat with the syntax move c:\Sourcefoldernam\*.* e:

jQuery: Move element by relative value

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问题 (Meaning an elements left-value): What's the easiest way to move an element - e.g. 10px to the left (from its current position)? 回答1: It might be that jQuery is overkill and setting margin-left: -10px will do the trick. You can get an element's offset() relative to the document: http://docs.jquery.com/CSS/offset That'd give you the left,top,etc. Then you might have to position the element using the css like so. subMenu.css({ position: 'absolute', zIndex: 5000, left: left, top: top }); 回答2:

Default move constructor and reference members

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问题 From [12.8] [11] of N3337: The implicitly-defined copy/move constructor for a non-union class X performs a memberwise copy/move of its bases and members. [ Note: brace-or-equal-initializers of non-static data members are ignored. See also the example in 12.6.2. —end note ] The order of initialization is the same as the order of initialization of bases and members in a user-defined constructor (see 12.6.2). Let x be either the parameter of the constructor or, for the move constructor, an