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Formatting Decimal places in R
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# [1] "1.20"
format(round(1, 2), nsmall = 2)
# [1] "1.00"
format(round(1.1234, 2), nsmall = 2)
# [1] "1.12"
A more general function is as follows where x is the number and k is the number of decimals to show. trimws removes any leading white space which can be useful if you have a vector of numb...
Serializing class instance to JSON
...dict__) returns proper data in the format of: {"value2": "345", "value1": "123"} I had seen posts like this before, wasn't sure whether I needed a custom serializer for members, needing init wasn't mentioned explicitly or I missed it. Thank you.
– ferhan
Apr 2...
Is it better in C++ to pass by value or pass by constant reference?
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Edit: New article by Dave Abrahams on cpp-next: Want speed? Pass by value.
Pass by value for...
Unable to login to SQL Server + SQL Server Authentication + Error: 18456
I have created login account on my localhost\sql2008 Server (Eg. User123)
6 Answers
6
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Difference between freeze and seal
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123
I wrote a test project which compares these 3 methods:
Object.freeze()
Object.seal()
Object....
Dynamically select data frame columns using $ and a character value
...is a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. S...
File Upload using AngularJS
...de($newfilename);
}
js fiddle (only front-end)
https://jsfiddle.net/vince123/8d18tsey/31/
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How to check if click event is already bound - JQuery
...a namespace on the event so it doesn't drop all handlers like: 'keypup.test123'
– SemanticZen
May 29 '19 at 5:54
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Make body have 100% of the browser height
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123
If you have a background image then you will want to set this instead:
html{
height: 100%;
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Error installing mysql2: Failed to build gem native extension
...t be 127.0.0.1, and if the password is number, it must be put in quote ex '123456' otherwise we can type normally ex admin123
– duykhoa
Oct 30 '12 at 7:46
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