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Transform DateTime into simple Date in Ruby on Rails
....to_date
NoMethodError: undefined method 'to_date' for #<DateTime: -1/2,0,2299161>
from (irb):1
>> require 'active_support/core_ext'
=> true
>> DateTime.new.to_date
=> Mon, 01 Jan -4712
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Does uninstalling a package with “pip” also remove the dependent packages?
...ze # all the packages here are dependencies of specloud package
figleaf==0.6.1
nose==1.1.2
pinocchio==0.3
specloud==0.4.5
$ pip uninstall specloud
$ pip freeze
figleaf==0.6.1
nose==1.1.2
pinocchio==0.3
As you can see those packages are dependencies from specloud and they're still there, but no...
Ruby: Merging variables in to a string
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answered Feb 16 '09 at 21:42
Mike WoodhouseMike Woodhouse
47.6k1212 gold badges8585 silver badges123123 bronze badges
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Why does 'continue' behave like 'break' in a Foreach-Object?
...on a particular iteration, thus, it simulates the continue in a loop.
1..100 | ForEach-Object {
if ($_ % 7 -ne 0 ) { return }
Write-Host "$($_) is a multiple of 7"
}
There is a gotcha to be kept in mind when refactoring. Sometimes one wants to convert a foreach statement block into a pipe...
Bash empty array expansion with `set -u`
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20
The only safe idiom is ${arr[@]+"${arr[@]}"}
This is already the recommendation in ikegami's an...
Add a new element to an array without specifying the index in Bash
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edited Dec 23 '09 at 9:18
answered Dec 23 '09 at 9:02
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Convert int to char in java
...ascii value 49 (one corresponding to '1')
If you want to convert a digit (0-9), you can add 48 to it and cast, or something like Character.forDigit(a, 10);.
If you want to convert an int as in ascii value, you can use Character.toChars(48) for example.
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JavaScript equivalent to printf/String.Format
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50 Answers
50
Active
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dplyr: “Error in n(): function should not be called directly”
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120
I presume you have dplyr and plyr loaded in the same session. dplyr is not plyr. ddply is not a ...
防挂马：apache禁止访问文件或目录执行权限、禁止运行脚本PHP文件的设置方...
...权限的目录路径，例如：D:/piaoyun.cc/upload">
ErrorDocument 404 /404/404.html
ErrorDocument 403 /404/403.html
<FilesMatch "\.(?i:php|php3|php4)$"> // ?是尽可能多的匹配.php的字符串,i是不区分大小写,然后冒号后面跟上正则表达式，也可以写成：<FilesMat...