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Looping through a hash, or using an array in PowerShell
... property. Here is an example how:
$hash = @{
a = 1
b = 2
c = 3
}
$hash.Keys | % { "key = $_ , value = " + $hash.Item($_) }
Output:
key = c , value = 3
key = a , value = 1
key = b , value = 2
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Preferred way to create a Scala list
...end is O(1).
– Daniel C. Sobral
Aug 31 '15 at 19:33
@pgoggijr That is not true. First, there's no "change" anywhere, b...
Get decimal portion of a number with JavaScript
I have float numbers like 3.2 and 1.6 .
22 Answers
22
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Should all Python classes extend object?
... new-style classes.
Finally, old-style classes have disappeared in Python 3, and inheritance from object has become implicit. So, always prefer new style classes unless you need backward compat with old software.
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Return multiple values in JavaScript?
...
1380
No, but you could return an array containing your values:
function getValues() {
return [...
Re-ordering columns in pandas dataframe based on column name [duplicate]
...
399
df = df.reindex(sorted(df.columns), axis=1)
This assumes that sorting the column names will ...
Check if something is (not) in a list in Python
...
532
The bug is probably somewhere else in your code, because it should work fine:
>>> 3 n...
Split column at delimiter in data frame [duplicate]
...me.
I added a "x|y" line to avoid ambiguities:
df <- data.frame(ID=11:13, FOO=c('a|b','b|c','x|y'))
foo <- data.frame(do.call('rbind', strsplit(as.character(df$FOO),'|',fixed=TRUE)))
Or, if you want to replace the columns in the existing data.frame:
within(df, FOO<-data.frame(do.call('r...
Is there an R function for finding the index of an element in a vector?
... function match works on vectors :
x <- sample(1:10)
x
# [1] 4 5 9 3 8 1 6 10 7 2
match(c(4,8),x)
# [1] 1 5
match only returns the first encounter of a match, as you requested. It returns the position in the second argument of the values in the first argument.
For multiple matching, ...
Validate phone number with JavaScript
...ctly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
26 Answers
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