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How to check a string for specific characters?
...# original answer given, but less Pythonic than the above...
s.find('$')==-1 # not found
s.find('$')!=-1 # found
And so on for other characters.
... or
pattern = re.compile(r'\d\$,')
if pattern.findall(s):
print('Found')
else
print('Not found')
... or
chars = set('0123456789$,')
if an...
Order data frame rows according to vector with specific order
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Try match:
df <- data.frame(name=letters[1:4], value=c(rep(TRUE, 2), rep(FALSE, 2)))
target <- c("b", "c", "a", "d")
df[match(target, df$name),]
name value
2 b TRUE
3 c FALSE
1 a TRUE
4 d FALSE
It will work as long as your target contains exact...
What is the difference between '/' and '//' when used for division?
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13 Answers
13
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Cleaning `Inf` values from an R dataframe
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121
Option 1
Use the fact that a data.frame is a list of columns, then use do.call to recreate a ...
What is the most efficient way to concatenate N arrays?
...oncat() is the way to go for convenience and likely performance.
var a = [1, 2], b = ["x", "y"], c = [true, false];
var d = a.concat(b, c);
console.log(d); // [1, 2, "x", "y", true, false];
For concatenating just two arrays, the fact that push accepts multiple arguments consisting of elements to ...
How to remove single character from a String
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231
You can also use the StringBuilder class which is mutable.
StringBuilder sb = new StringBuilder...
Getting distance between two points based on latitude/longitude
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215
Edit: Just as a note, if you just need a quick and easy way of finding the distance between two...
Is there a better way to iterate over two lists, getting one element from each list for each iterati
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answered Dec 17 '09 at 2:03
Roberto BonvalletRoberto Bonvallet
25.9k55 gold badges3737 silver badges5555 bronze badges
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How to strip all non-alphabetic characters from string in SQL Server?
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18 Answers
18
Active
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