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Filter rows which contain a certain string
...n easily extend to more than one column.
Below also a solution with filter_all in order to find the string in any column,
using diamonds as example, looking for the string "V"
library(tidyverse)
String in only one column
# for only one column... extendable to more than one creating a column list in...
How to remove last n characters from every element in the R vector
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117
Here is an example of what I would do. I hope it's what you're looking for.
char_array = c("...
Scala equivalent of Java java.lang.Class Object
...type of getClass.
(James Moore reports that the ticket is "now", ie Nov. 2011, two years later, fixed.
In 2.9.1, getClass now does:
scala> "foo".getClass
res0: java.lang.Class[_ <: java.lang.String] = class java.lang.String
)
Back in 2009:
It would be useful if Scala were to treat th...
BASH copy all files except one
I would like to copy all files out of a dir except for one named Default.png. It seems that there are a number of ways to do this. What seems the most effective to you?
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.NET Process.Start default directory?
...ctory property.
– Brain2000
Sep 13 '11 at 14:39
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Difference between passing array and array pointer into function in C
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115
First, some standardese:
6.7.5.3 Function declarators (including prototypes)
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7 A declara...
Can mustache iterate a top-level array?
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edited Feb 11 '13 at 14:35
answered Apr 4 '12 at 15:15
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String formatting in Python 3
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Mark ReedMark Reed
76.8k1313 gold badges110110 silver badges143143 bronze badges
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Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
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The regular expression for this is really simple. Just use a character class. The hyphen is a special character in character classes, so it needs to be first:
/[-!$%^&*()_+|~=`{}\[\]:";'<>?,.\/]/
You also need to escape the other regular expressio...
How to set current working directory to the directory of the script in bash?
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If you called the script as ./script, . is the correct directory, and changing to . it will also end up in the very directory where script is located, i.e. in the current working directory.
– ndim
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