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Create a variable name with “paste” in R?
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125
You can use assign (doc) to change the value of perf.a1:
> assign(paste("perf.a", "1", sep="...
How do I declare and initialize an array in Java?
...d(0, 100).toArray(); // From 0 to 100
int [] myIntArray = IntStream.of(12,25,36,85,28,96,47).toArray(); // The order is preserved.
int [] myIntArray = IntStream.of(12,25,36,85,28,96,47).sorted().toArray(); // Sort
For classes, for example String, it's the same:
String[] myStringArray = new Strin...
Boolean literals in PowerShell
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JoeyJoey
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add a...
Is there a Java equivalent to C#'s 'yield' keyword?
... i = 0; i < 10; i++) {
yieldReturn(i);
if (i == 5) yieldBreak();
}
}
};
While Jim's is way more complicated, requiring you to adept a generic Collector which has a collect(ResultHandler) method... ugh. However, you could use something like this wrapper around...
Transform DateTime into simple Date in Ruby on Rails
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answered Jul 10 '09 at 16:57
Ryan McGearyRyan McGeary
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How to convert list of key-value tuples into dictionary?
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answered Jul 5 '11 at 17:28
ninjageckoninjagecko
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Assign multiple columns using := in data.table, by group
...1 hi hello
# 2: 2 2 hi hello
# 3: 3 3 hi hello
# 4: 1 4 hi hello
# 5: 2 5 hi hello
# 6: 3 6 hi hello
x[ , c("mean", "sum") := list(mean(b), sum(b)), by = a][]
# a b col1 col2 mean sum
# 1: 1 1 hi hello 2.5 5
# 2: 2 2 hi hello 3.5 7
# 3: 3 3 hi hello 4.5 9
# 4: 1 4 h...
Comparing two CGRects
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250
Use this:
if (CGRectEqualToRect(self.view.frame, rect)) {
// do some stuff
}
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Ruby: Merging variables in to a string
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edited Mar 9 '17 at 14:51
Chucky
52377 silver badges1414 bronze badges
answered Feb 16 '09 at 21:42
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