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javascript - Stop form refreshing page on submit

How would I go about preventing the page from refreshing when pressing the send button without any data in the fields? The validation ... //////////////// }); Question&Answers:os...

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

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php - Object of class mysqli_result could not be converted to string

I am getting the error: Object of class mysqli_result could not be converted to string This is my code: $result = ... ='data/$result.php'>My account</a>"; Question&Answers:os...

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

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146 views

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windows - What encoding/code page is cmd.exe using?

When I open cmd.exe in Windows, what encoding is it using? How can I check which encoding it is currently using? ... t know what's going on. Can anyone explain? Question&Answers:os...

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

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124 views

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c# - LINQ - Full Outer Join

I have a list of people's ID and their first name, and a list of people's ID and their surname. Some people don't ... -- 1 John Doe 2 Sue What am I doing wrong? Question&Answers:os...

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

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Python 3.x rounding behavior

I was just re-reading What's New In Python 3.0 and it states: The round() function rounding strategy and ... default?, so I will be reading that carefully. Question&Answers:os...

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

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jquery - $(this) inside of AJAX success not working

I am trying to change some old code which uses onclick so that I an use the $(this). The problem is that $(this) is ... $(this).addClass("test"); } } }); }); Question&Answers:os...

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

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74 views

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How to force file download with PHP

I want to require a file to be downloaded upon the user visiting a web page with PHP. I think it has ... is not redirecting to another page. It just stops. Question&Answers:os...

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

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regex - Using regular expressions to validate a numeric range

My input number is an int. But the input number must be in a range from -2055 to 2055 and I want to check ... so I should use regex to check the input number Question&Answers:os...

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

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How can I create a memory leak in Java?

I just had an interview where I was asked to create a memory leak with Java. Needless to say, I felt pretty ... start creating one. What would an example be? Question&Answers:os...

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

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javascript - How to check if a string "StartsWith" another string?

How would I write the equivalent of C#'s String.StartsWith in JavaScript? var haystack = 'hello world'; var ... (2015) browser support is far from complete. Question&Answers:os...

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

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python - How to create a tuple with only one element

In the below example I would expect all the elements to be tuples, why is a tuple converted to a string when it only ... 'str'> <type 'str'> <type 'tuple'> Question&Answers:os...

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

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367 views

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javascript - Can scrapy be used to scrape dynamic content from websites that are using AJAX?

I have recently been learning Python and am dipping my hand into building a web-scraper. It's nothing fancy at ... scrape this betting odds data in real-time? Question&Answers:os...

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

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php - How to access object properties with names like integers or invalid property names?

I am using json_decode() something like: $myVar = json_decode($data) Which gives me output like this: [ ... numerals/integers there seems to be problem. Question&Answers:os...

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

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jsp - How to install JSTL? The absolute uri: http://java.sun.com/jstl/core cannot be resolved

I don't know what I've done incorrectly, but I can't include JSTL. I have jstl-1.2.jar, but unfortunately I get ... html> <head></head> <body></body> </html> Question&Answers:os...

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

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Is it possible to force Excel recognize UTF-8 CSV files automatically?

I'm developing a part of an application that's responsible for exporting some data into CSV files. The application ... accepting Mark's answer as the best one. Question&Answers:os...

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

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Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?

Git has a well-known, or at least sort-of-well-known, empty tree whose SHA1 is: ... have a general aversion to magic numbers.) Question&Answers:os...

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

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162 views

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How to select JSF components using jQuery?

I am trying to implement jQuery with PrimeFaces and JSF components, but it's not working properly. When I tried to do the same ... else { $("#p2").show(); } }); Question&Answers:os...

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

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java - Socket using in a swing applet

I should made a server & client in Java,based on Swing and gui.I neeed to make somehow a socket that will go ... example or can explain how is it being done? Question&Answers:os...

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

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394 views

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node.js - What's the difference between tilde(~) and caret(^) in package.json?

After I upgraded to the latest stable node and npm, I tried npm install moment --save. It saves the entry in ... caret ^? What are the advantages over others? Question&Answers:os...

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

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python - How can I do a line break (line continuation)?

I have a long line of code that I want to break up among multiple lines. What do I use and what is the syntax? For example, adding ... e = 'a' + 'b' + 'c' + 'd' Question&Answers:os...

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

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400 views

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google chrome - Debugging "Element is not clickable at point" error

I see this only in Chrome. The full error message reads: "org.openqa.selenium.WebDriverException: Element ... displayed window without any need for scrolling. Question&Answers:os...

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

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How to change an application icon programmatically in Android?

Is it possible to change an application icon directly from the program? I mean, change icon.png in the ... see the previously selected icon in the launcher. Question&Answers:os...

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

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229 views

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java - How to nicely format floating numbers to string without unnecessary decimal 0's

A 64-bit double can represent integer +/- 253 exactly. Given this fact, I choose to use a double type as a ... args...) is locale-dependent (see answers below). Question&Answers:os...

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

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1.2k views

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groovy - How to access java-classes in the default-package?

I'm working now together with others in a grails project. I have to write some Java-classes. But I need access ... package from a Java-class in a named package? Question&Answers:os...

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

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158 views

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python - Why should exec() and eval() be avoided?

I've seen this multiple times in multiple places, but never have found a satisfying explanation as to why this ... bad. Is it bad in non-web-applications? Question&Answers:os...

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

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65 views

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How do I turn a C# object into a JSON string in .NET?

I have classes like these: class MyDate { int year, month, day; } class Lad { string firstName; ... options besides manually creating a JSON string writer? Question&Answers:os...

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

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230 views

1 answer

javascript - Fastest way to flatten / un-flatten nested JSON objects

I threw some code together to flatten and un-flatten complex/nested JSON objects. It works, but it's a bit slow ... /14/ http://jsperf.com/flatten-un-flatten/4 Question&Answers:os...

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

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59 views

1 answer

How do I read and write CSV files with Python?

I have a file example.csv with the contents 1,"A towel,",1.0 42," it says, ",2.0 1337,is about the most ,- ... )] How do I write data to a CSV file with Python? Question&Answers:os...

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

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