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Float vs Decimal in ActiveRecord
... a Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
That's why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.10000000000000000555111512312578270...
Shuffle two list at once with same order
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– Jaroslav Klimčík
Apr 25 '14 at 10:15
4
(noob question) - what does the * mean?
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Specified argument was out of the range of valid values. Parameter name: site
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Adil B
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answered Aug 21 '13 at 8:22
MustafaPMustafaP
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JSON.parse vs. eval()
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110
You are more vulnerable to attacks if using eval: JSON is a subset of Javascript and json.pars...
How to declare constant map
... a pseudo-constant), you can do:
var romanNumeralDict = map[int]string{
1000: "M",
900 : "CM",
500 : "D",
400 : "CD",
100 : "C",
90 : "XC",
50 : "L",
40 : "XL",
10 : "X",
9 : "IX",
5 : "V",
4 : "IV",
1 : "I",
}
Inside a func you can declare it like:
romanNum...
Comment out text in R Markdown (Rmd file)
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edited Mar 10 at 6:10
answered Apr 24 '19 at 2:18
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No “pull” in Git Gui?
...um post:
http://git.661346.n2.nabble.com/No-quot-pull-quot-in-git-gui-td1121058.html
A fetch and merge should be done.
It seems you need to go to "Remote" menu, then "Fetch from" option , in my case origin, and then go to "Merge Menu" and then "Local Merge...".
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How to open emacs inside bash
I'm using Ubuntu 11.10. When I type command "emacs" in terminal, it opens emacs as a seperate window. How can I open it inside the terminal, like nano editor?
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Unique combination of all elements from two (or more) vectors
... GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11 DEF 2012-05-04
12 GHI 2012-05-04
13 ABC 2012-05-05
14 DEF 2012-05-05
15 GHI 2012-05-05
If the resulting order isn't what you want, you can sort afterwards. If you name the arguments to expand.grid...
ASP.NET MVC Performance
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edited Oct 16 '09 at 10:41
GateKiller
66.4k7070 gold badges165165 silver badges203203 bronze badges
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