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What are the benefits to marking a field as `readonly` in C#?
...instance, there is no danger of passing an immutable structure to another random portion of code. They can't changed it ever so you can program reliably against that structure.
Here is a good entry about one of the benefits of immutability: Threading
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Convert column classes in data.table
... dt[, Quarter:=as.character(Quarter)]
str(dtnew)
Classes ‘data.table’ and 'data.frame': 10 obs. of 3 variables:
$ ID : Factor w/ 2 levels "A","B": 1 1 1 1 1 2 2 2 2 2
$ Quarter: chr "1" "2" "3" "4" ...
$ value : num -0.838 0.146 -1.059 -1.197 0.282 ...
Using lapply and as.charac...
What does Maven Update Project do in Eclipse?
...ava version, you will find that Eclipse will ask you to update the project and afterwards the configured Java runtime in the project will have changed to reflect what your Maven pom indicates.
That is an important thing to keep in mind: the Maven pom is the lead in this kind of project setup. If yo...
What does “not run” mean in R help pages?
...isible on help pages, but will
be run both by the package checking tools, and the
'example()' function. This was previously 'testonly', and
that form is still accepted.
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How to change the indentation width in emacs javascript mode
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Using this mechanism the tab width remains at 8 and so tabs are only used if indent level is 4 (2x4=8) or more. How do you set tab width to 2 or 4 so that tabs instead of spaces are used? I've tried a bunch of settings, e.g. (setq tab-width 4) but to no avail. My goal: use...
Get visible items in RecyclerView
...d to work with View.getGlobalVisibleRect(...) , but that hack is too ugly and does not always work too.
9 Answers
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Sending email in .NET through Gmail
...sages using my Gmail account. The emails are personalized emails to the bands I play on my show.
22 Answers
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How to get Maven project version to the bash command line
...evious I issued a question on how to change Maven project vesion from command line which lead me to a new issue.
28 Answe...
CSS background image to fit width, height should auto-scale in proportion
...e can set length values, it's usually used with the special values contain and cover. In your specific case, you should use cover:
body {
background-image: url(images/background.svg);
background-size: cover; /* <------ */
background-repeat: no-repeat;
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Why main does not return 0 here?
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That rule was added in the 1999 version of the C standard. In C90, the status returned is undefined.
You can enable it by passing -std=c99 to gcc.
As a side note, interestingly 9 is returned because it's the return of printf which just wrote 9 characters.
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