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file io - How do I read in the contents of a directory in Perl?

How do I get Perl to read the contents of a given directory into an array? Backticks can do it, but is there ... 'scandir' or a similar term? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Why don't audio and video events bubble?

I was wondering why some Javascript of mine would not work until I figured that the audio events did not bubble ... audio- and video-tag bubble? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - how to get a client's MAC address from HttpServlet?

I was asked to write a servlet that collects client's details such as ip, mac address etc. getting his IP is ... 'm working on top of Tomcat6) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - ggplot2: change order of display of a factor variable on an axis

When I use geom_tile() with ggplot2 and discrete scales the labels are in ascending order on the x-axis and in ... a quick way to do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring + Hibernate : a different object with the same identifier value was already associated with the session

In my application, which uses Spring and Hibernate, I parse a CSV file and populate the db by calling handleRow( ... Cascade.java:268) Any tips? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Access my entire browsing history via Javascript

If i click on the history tab on my browser I can reach a folder with all of the links ive visited organized ... in my own browser? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Excel VBA - Range.Copy transpose paste

I'm trying to something very simple, but I seem to be stuck. I am following the help menu for PasteSpecial ... simple way to accomplish this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Parse JavaScript with jsoup

In a HTML page, i want to pick the value of a javascript variable. Below is the snippet of HTML page. <input ... with jsoup? if yes then how? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Material UI v4 makeStyles exported from a single file doesn't retain the styles on refresh

I am using Material UI v4, i'm exporting my styles from a single file, But the styles won't work in other ... why? and how i can fix this See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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datetime - Convert 12-hour date/time to 24-hour date/time

I have a tab delimited file where each record has a timestamp field in 12-hour format: mm/dd/yyyy hh:mm ... addition to the usual Windows tools. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - What are techniques to get around the IE file download security rules?

Internet Explorer (with default settings, which I generally assume will be in effect on the desktops of the Great ... break the impasse for me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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.net - Best way to use StructureMap to implement Strategy pattern

My web app has some slight variations in business logic and presentation logic depending on the type of user that is ... Version B")); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scala - Processing multiple files as independent RDD's in parallel

I have a scenario where a certain number of operations including a group by has to be applied on a number ... and operate on them independently. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Make SimpleDateFormat.parse() fail on invalid dates (e.g. month is greater than 12)

I'm using java.text.SimpleDateFormat to parse strings of the form "yyyyMMdd". If I try to parse a ... plain JDK without external libraries. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Json.net serialize specific private field

I have the following class: public class TriGrid { private List<HexTile> _hexes; //other private fields... //other ... I am doing wrong here? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - orderBy array item value in Angular ng-repeat

How can I get Angular's ng-repeat directive to sort a list by each item's actual value, rather than by the ... , but is that my only option? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to check if all items in a list are there in another list?

I have two lists say List1 = ['a','c','c'] List2 = ['x','b','a','x','c','y','c'] Now I ... List2. Is there a better way to do this? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Is it okay to use array[key] in PHP?

Is it okay to use array without single or double quotion like $array[key]? I thought it is bad because PHP look ... . What do you guys think? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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floating point - Arithmetic expressions in Bash?

I had used several ways to do some simple integer arithmetic in BASH (3.2). But I can't figure out the best ( ... result=`echo "7/354" | bc` See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Use a trigger to stop an insert or update

Since MySQL ignores check constraints, how does one go about using a trigger to stop an insert or update ... doing check constraints in MySQL? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Can I use arrow function in constructor of a react component?

This question is similar to When using React Is it preferable to use fat arrow functions or bind functions in ... these two ways? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - Rotating a CGImage

I have a UIImage that I'm getting from a UIImagePickerController. When I receive the image from the - (void) ... rotation appears to not work. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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html - css "left" not working

I have 2 divs, parent and child, I want that child left side (left border) will in center of parent. Why ... demo http://jsfiddle.net/vrse2/5/ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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google apps script - What happens when I "sleep" in GAS ? (execution time limit workaround)

Behind this (not so much I admit...) funny question is a real question about a workaround I use without really ... min+':'+sec return st } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - mysql dynamic query in stored procedure

i am creating a dynamic query in stored procedure. my stored procedure is as follows: CREATE PROCEDURE `test1`(IN ... . Thanks for your help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Send SMS until it is successful

I am trying to send an urgent SMS from my application. I have to make sure that the SMS is being sent ... message, receivers[0]); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Java HashSet contains duplicates if contained element is modified

Let's say you have a class and you create a HashSet which can store this instances of this class. If you try ... I don't like this solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - How do nested vertical margin collapses work?

I am having a hard time grasping the concept of vertical margins collapsing in nested elements. I came an ... CSS in a simplified manner? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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