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How to combine multiple conditions to subset a data-frame using “OR”?
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my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics the behavior of this function and would be more appropriate for inclusion within a function body:
new.data <- data[ which( data$V1 > 2 | data$V2 < 4) , ]
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Abusing the algebra of algebraic data types - why does this work?
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140
Disclaimer: A lot of this doesn't really work quite right when you account for ⊥, so I'm goi...
Efficient way to determine number of digits in an integer
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107
Well, the most efficient way, presuming you know the size of the integer, would be a lookup. ...
WARN Could not determine content-length of response body. Set content-length of the response or set
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165
This is a problem of Webrick.
you can use "Thin" instead.
Add this to Gemfile
gem 'thin'
t...
Text Progress Bar in the Console [closed]
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31 Answers
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Run git pull over all subdirectories [duplicate]
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16 Answers
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Python: using a recursive algorithm as a generator
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117
def getPermutations(string, prefix=""):
if len(string) == 1:
yield prefix + string...
Browser detection in JavaScript? [duplicate]
...|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
if(/trident/i.test(M[1])){
tem= /\brv[ :]+(\d+)/g.exec(ua) || [];
return 'IE '+(tem[1] || '');
}
if(M[1]=== 'Chrome'){
tem= ua.match(/\b(OPR|Edge?)\/(\d+)/);
if(tem!= null) return tem.slice(1).join(' ').re...
Bootstrap throws Uncaught Error: Bootstrap's JavaScript requires jQuery [closed]
...trying to use Bootstrap to make an interface for a program. I added jQuery 1.11.0 to the <head> tag and thought that was that, but when I launch the web page in a browser jQuery reports an error:
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How do you round a number to two decimal places in C#?
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15 Answers
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