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java - When should we use intern method of String on String literals

According to String#intern(), intern method is supposed to return the String from the String pool if the String ... other words when should we use this method? Question&Answers:os...

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

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python - Checking whole string with a regex

I'm trying to check if a string is a number, so the regex "d+" seemed good. However that regex also fits "78.46.92 ... confused, how does "." or ":" match "d"? Question&Answers:os...

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

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java - How do I change a JFreeChart's size

I've added a JFreeChart to a JPanel (using a BorderLayout), and it's huge. Is there something I can do to ... add(cp); middle.add(graph, BorderLayout.CENTER); } Question&Answers:os...

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

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css - Padding for Inline Elements

I am reading a book about CSS basics. It is claimed in the book that an inline element has complete padding properties but no ... </p> </div> </body> </html> Question&Answers:os...

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

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php - Form inside of $.load not posting correctly

Well here's what I got, basically a button is clicked and the following code is executed: Readthis = " ... . Monsterrequest.php: http://pastebin.com/fiFjjBZg Question&Answers:os...

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

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215 views

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node.js - How can I update NodeJS and NPM to the next versions?

I just installed Node.js and npm (for additional modules). How can I update Node.js and the modules which I' ... ? I followed this steps in the npm section. Question&Answers:os...

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

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javascript - How can I make a div stick to the top of the screen once it's been scrolled to?

I would like to create a div, that is situated beneath a block of content but that once the page has been ... becomes fixed in place and scrolls with the page. Question&Answers:os...

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

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How do I create a constant in Python?

Is there a way to declare a constant in Python? In Java we can create constant values in this manner: ... of the above Java constant declaration in Python? Question&Answers:os...

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

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android - How to set the text color of TextView in code?

In XML, we can set a text color by the textColor attribute, like android:textColor="#FF0000". But how do ... is it a resource reference value or anything else? Question&Answers:os...

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

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memory - Detect application heap size in Android

How do you programmatically detect the application heap size available to an Android app? I heard there's a ... solution that works for 1.5 and upwards. Question&Answers:os...

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

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branch - Track all remote git branches as local branches

Tracking a single remote branch as a local branch is straightforward enough. $ git checkout --track -b ${branch_name} ... RTMs, but have come up bunk thus far. Question&Answers:os...

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

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Is __init__.py not required for packages in Python 3.3+

I am using Python 3.5.1. I read the document and the package section here: https://docs.python.org/3/tutorial ... /a and ~/Playground/a/b it works fine. Question&Answers:os...

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

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Convert char to int in C#

I have a char in c#: char foo = '2'; Now I want to get the 2 into an int. I find that ... odd that there's nothing native to directly make the conversion. Question&Answers:os...

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

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javascript - What values can a constructor return to avoid returning this?

What are the exact circumstances for which a return statement in Javascript can return a value other than this when a ... Foo () instanceof Foo) === false? Question&Answers:os...

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

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inversion of control - What is a composition root in the context of dependency injection?

I am exploring dependency injection and the term composition root is used all over the place. So what is it? Question&Answers:os...

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

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How to parse XML using vba

I work in VBA, and want to parse a string eg <PointN xsi:type='typens:PointN' xmlns:xsi='http://www.w3.org/2001/ ... of the field I work in. How do I do this? Question&Answers:os...

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

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rust - Cannot move out of borrowed content / cannot move out of behind a shared reference

I don't understand the error cannot move out of borrowed content. I have received it many times and I have always ... What is the origin of this kind of error? Question&Answers:os...

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

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linux - How to pass command output as multiple arguments to another command

I want to pass each output from a command as multiple argument to a second command, e.g.: grep "pattern" input ... like: grep "pattern" input | cp $1 $1.bac Question&Answers:os...

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

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Why Android app crashes for initializing variable with findViewById(R.id.******) at the beginning of the class?

I was just testing input/output, there was no special purpose, this is the last code that had run successfully: ... Is there better or easier way to do that? Question&Answers:os...

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

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batch file - How do I measure execution time of a command on the Windows command line?

Is there a built-in way to measure execution time of a command on the Windows command line? Question&Answers:os...

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

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470 views

1 answer

Android: How can I get the current foreground activity (from a service)?

Is there a native android way to get a reference to the currently running Activity from a service? I have a ... do that (like the one I suggested above)? Question&Answers:os...

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

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321 views

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CSS @font-face not working with Firefox, but working with Chrome and IE

The following code works in Google Chrome beta as well as IE 7. However, Firefox seems to have a problem with this ... How is this possible? What am I missing? Question&Answers:os...

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

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492 views

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c# - How to get the Display Name Attribute of an Enum member via MVC Razor code?

I've got a property in my model called Promotion that its type is a flag enum called UserPromotion. Members of my enum ... of "currentPromotion".</li> } } </ul> Question&Answers:os...

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

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113 views

1 answer

ios - How do I URL encode a string

I have a URL string (NSString) with spaces and & characters. How do I url encode the entire string (including the & ampersand character and spaces)? Question&Answers:os...

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

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460 views

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python - psycopg2: insert multiple rows with one query

I need to insert multiple rows with one query (number of rows is not constant), so I need to execute query ... VALUES "+args_str) but I want some simpler way. Question&Answers:os...

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

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454 views

1 answer

asp.net - Content-Disposition:What are the differences between "inline" and "attachment"?

What are the differences between Response.AddHeader("Content-Disposition", "attachment;filename=somefile.ext") and Response. ... the specs, but it is clueless. Question&Answers:os...

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

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512 views

1 answer

xhtml - Can an HTML element have multiple ids?

I understand that an id must be unique within an HTML/XHTML page. For a given element, can I assign multiple ... m just curious about using ids in this manner. Question&Answers:os...

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

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621 views

1 answer

mysql - ERROR 1452: Cannot add or update a child row: a foreign key constraint fails

I have created tables in MySQL Workbench as shown below : ORDRE table: CREATE TABLE Ordre ( OrdreID INT NOT ... overseeing something or any idea what to do? Question&Answers:os...

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

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