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Where does 'Hello world' come from?
' hello, world ' is usually the first example for any programming language. I've always wondered where this sentence came from and where was it first used.
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Select the values of one property on all objects of an array in PowerShell
...e:
$results = $objects.Name
Which should fill $results with an array of all the 'Name' property values of the elements in $objects.
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How do I make a list of data frames?
...to your question, but you want to use = and not <- within the function call. If you use <-, you'll end up creating variables y1 and y2 in whatever environment you're working in:
d1 <- data.frame(y1 <- c(1, 2, 3), y2 <- c(4, 5, 6))
y1
# [1] 1 2 3
y2
# [1] 4 5 6
This won't have the s...
Java: using switch statement with enum under subclass
... case VALUE_A: {
//..
break;
}
}
The clue is in the error. You don't need to qualify case labels with the enum type, just its value.
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git ignore vim temporary files
...t is the correct way to make git ignore temporary files produced by vim in all directories (either globally across the system or locally for a single project)?
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How do you programmatically set an attribute?
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Damn shame it doesn't work in all cases, as that would be really useful, for example, for adding the dirty attribute to user input...
– brice
Feb 28 '12 at 18:32
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Switch on ranges of integers in JavaScript [duplicate]
...");
break;
}
Keep in mind that this adds an extra point of human error - someone may try to update a range, but forget to change it in both places, leaving an overlap or gap that is not covered. e.g. here the case of 8 will now not match anything when I just edit the case that used to matc...
Center content of UIScrollView when smaller
... the scroll view, everything works fine. However, when the image becomes smaller than the scroll view, it sticks to the top left corner of the scroll view. I would like to keep it centered, like the Photos app.
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Fastest check if row exists in PostgreSQL
...for picture) If rows already exist and subquery is omitted I think ill get errors with duplicate unique key thrown or? (userid&right form that unique key)
– Valentin Kuzub
Sep 19 '11 at 14:00
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foreach vs someList.ForEach(){}
... The most common one is described in the comments to this question.
Generally, if you are looking to remove multiple items from a list, you would want to separate the determination of which items to remove from the actual removal. It doesn't keep your code compact, but it guarantees that you do n...