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Suppose I have the following regex that matches a string with a semicolon at the end: ".+"; It will match any ... 't have to put any characters in the string? Question&Answers:os...

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java - Could not reserve enough space for object heap

I am getting the following exception repeatedly each time I try to run the program. Error occurred during ... avail. How can I eliminate this error? Question&Answers:os...

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c++ - Why does modulus division (%) only work with integers?

I recently ran into an issue that could easily be solved using modulus division, but the input was a float: Given a periodic ... ) % (2 * math.pi) - math.pi) Question&Answers:os...

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How to generate in PHP all combinations of items in multiple arrays

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string - Extract substring in Bash

Given a filename in the form someletters_12345_moreleters.ext, I want to extract the 5 digits and put them ... different ways that this can be accomplished. Question&Answers:os...

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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...

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A quick and easy way to join array elements with a separator (the opposite of split) in Java

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image processing - Converting RGB to grayscale/intensity

When converting from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to ... See also these previous questions: here and here. Question&Answers:os...

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javascript - Working with select using AngularJS's ng-options

I have read about it in other posts, but I couldn't figure it out. I have an array, $scope.items = [ {ID: ... read select and tried, but I can't figure it out. Question&Answers:os...

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python - psycopg2: insert multiple rows with one query

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sql - Does PostgreSQL support "accent insensitive" collations?

In Microsoft SQL Server, it's possible to specify an "accent insensitive" collation (for a database, table or ... " collations so the SELECT above would work. Question&Answers:os...

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sql - How to generate a range of numbers between two numbers?

I have two numbers as input from the user, like for example 1000 and 1050. How do I generate the numbers between ... want this: 1000 1001 1002 1003 . . 1050 Question&Answers:os...

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c - self referential struct definition?

I haven't been writing C for very long, and so I'm not sure about how I should go about doing these sorts ... struct Cell { int isParent; Cell child; } Cell; Question&Answers:os...

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javascript - Are there performance concerns with `return await`?

I see there is an eslint rule, no-return-await, for disallowing return await. In the rule's description, it states ... the eslint docs suggest? And if so, how? Question&Answers:os...

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Is it possible to set code behind a resource dictionary in WPF for event handling?

Is it possible to set code behind a resource dictionary in WPF. For example in a usercontrol for a button ... it's button click within the resource dictionary. Question&Answers:os...

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javascript - How can I wait for set of asynchronous callback functions?

I have code that looks something like this in javascript: forloop { //async call, returns an array to its ... call the continuing method. Thanks in advance. Question&Answers:os...

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sql - Auto Increment after delete in MySQL

I have a MySQL table with a primary key field that has AUTO_INCREMENT on. After reading other posts on here I' ... to look neat and have a bit more consistency. Question&Answers:os...

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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...

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ms access - SQL multiple join statement

When I had only one inner join in my SQL statement, it worked perfectly. I tried joining a second table, and now ... AND [course_number]='" & myCourseNum & "'" Question&Answers:os...

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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...

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c++ - What is the difference between char a[] = ?string?; and char *p = ?string?;?

As the heading says, What is the difference between char a[] = ?string?; and char *p = ?string?; This ... part of a string or it has some specific meaning? Question&Answers:os...

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python - What do ellipsis [...] mean in a list?

I was playing around in python. I used the following code in IDLE: p = [1, 2] p[1:1] = [ ... helpful. Any link to official documentation would be really useful. Question&Answers:os...

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C# catch a stack overflow exception

I have a recursive call to a method that throws a stack overflow exception. The first call is surrounded by a ... by Assembly.LoadFrom(...).CreateInstance(...) Question&Answers:os...

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python - Spark Equivalent of IF Then ELSE

I have seen this question earlier here and I have took lessons from that. However I am not sure why I am ... exactly 2 arguments (3 given) Any idea why? Question&Answers:os...

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javascript - Issue in returning data retrieved from DB queries called in the loop

I making multiple mongoDB queries in loop. and want to send the all results as one data array.But when I ... finalData;}*/ } } finalData is returned undefined. Question&Answers:os...

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database - What is the difference between single and double quotes in SQL?

What is the difference between single quotes and double quotes in SQL? Question&Answers:os...

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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...

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How do I use SwingWorker in Java?

Related to my previous question: Call repaint from another class in Java? I'm new to Java and I've had a look ... have looked but I'm not sure I understand yet. Question&Answers:os...

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