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Opposite of %in%: exclude rows with values specified in a vector
... use
`%not in%` <- function (x, table) is.na(match(x, table, nomatch=NA_integer_))
Another way is:
function (x, table) match(x, table, nomatch = 0L) == 0L
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How could I ignore bin and obj folders from git repository?
...l .gitignore file from one of my Visual Studio/git projects:
*.suo
*.user
_ReSharper.*
bin
obj
packages
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Age from birthdate in python
...t(True) is 1 and int(False) is 0:
from datetime import date
def calculate_age(born):
today = date.today()
return today.year - born.year - ((today.month, today.day) < (born.month, born.day))
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String comparison in Python: is vs. == [duplicate]
...ython allows anything to be used as a boolean expression. If you have bool_a == 3 and bool_b == 4, then bool_a != bool_b, but bool_a xor bool_b is false (because both terms are true).
– dan04
Jun 7 '10 at 12:57
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How to get memory available or used in C#
...nitializeRAMCounter();
updateTimer.Start();
}
private void updateTimer_Tick(object sender, EventArgs e)
{
this.textBox1.Text = "CPU Usage: " +
Convert.ToInt32(cpuCounter.NextValue()).ToString() +
"%";
this.textBox2.Text = Convert.ToInt32(ramCounter.NextValue()).ToString()+"Mb";...
Relative frequencies / proportions with dplyr
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Try this:
mtcars %>%
group_by(am, gear) %>%
summarise(n = n()) %>%
mutate(freq = n / sum(n))
# am gear n freq
# 1 0 3 15 0.7894737
# 2 0 4 4 0.2105263
# 3 1 4 8 0.6153846
# 4 1 5 5 0.3846154
From the dplyr vigne...
Finding most changed files in Git
...og --pretty=format: --name-only | Where-Object { ![string]::IsNullOrEmpty($_) } | Sort-Object | Group-Object | Sort-Object -Property Count -Descending | Select-Object -Property Count, Name -First 10
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How to rename a table in SQL Server?
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To rename a table in SQL Server, use the sp_rename command:
exec sp_rename 'schema.old_table_name', 'new_table_name'
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Shortcut to exit scale mode in VirtualBox [closed]
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@jj_ I hope they never fix it, I've been riding the karma from this question for 5 years.
– Mike Miller
Jun 9 '17 at 14:58
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How do I change the IntelliJ IDEA default JDK?
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May I ask IntelliJ IDEA to use my %JAVA_HOME% system variable as a value of JDK home path? I want IntelliJ IDEA to reflect changes of JAVA_HOME sys variable automatically.
– Ivan_Bereziuk
Nov 16 '17 at 10:48
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