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Why does Ruby 1.9.2 remove “.” from LOAD_PATH, and what's the alternative?
... @Joshua Cheek: Also, as a sort-of counterbalance to removing . from $LOAD_PATH, Ruby 1.9.2 introduces require_relative which ... surprise ... require s a file relative to the location of the currently executing file (i.e. relative to File.dirname(__FILE__) ).
– Jör...
Drop unused factor levels in a subsetted data frame
...- factor(subdf$letters)
> subdf$letters
[1] a b c
Levels: a b c
EDIT
From the factor page example:
factor(ff) # drops the levels that do not occur
For dropping levels from all factor columns in a dataframe, you can use:
subdf <- subset(df, numbers <= 3)
subdf[] <- lapply(subd...
How to get the second column from command output?
...t the lines on "s:
awk -F '"' '{print $2}' your_input_file
or for input from pipe
<some_command> | awk -F '"' '{print $2}'
output:
A B
C
D
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keep rsync from removing unfinished source files
...t of files to disk. mass has a lot of disk space. I want to move the files from speed to mass after they're done downloading. Ideally, I'd just run:
...
How do I find the current executable filename? [duplicate]
...which could be the same assembly as above, if your code is called directly from a class within your executable):
System.Reflection.Assembly.GetCallingAssembly().Location
If you'd like just the filename and not the path, use:
Path.GetFileName(System.Reflection.Assembly.GetEntryAssembly().Location...
Get the subdomain from a URL
Getting the subdomain from a URL sounds easy at first.
16 Answers
16
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What is this date format? 2011-08-12T20:17:46.384Z
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The T is just a literal to separate the date from the time, and the Z means "zero hour offset" also known as "Zulu time" (UTC). If your strings always have a "Z" you can use:
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US)...
How can I remove time from date with Moment.js?
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'day and date key both mean day-of-the-month.' from the docs. day works pre version 2.8.4.
– oldwizard
May 17 '17 at 7:13
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地图组件（高德地图） · App Inventor 2 中文网
...特征的 可见性 属性值）。此列表还包含通过调用 FeatureFromDescription 在 地图 上创建的所有特征点。
高度
设置地图的垂直高度，以像素px为单位。
高度百分比
设置地图的垂直高度相对于整个屏幕高度的百分比。
纬度
获...
How to get filename without extension from file path in Ruby
How can I get the filename from a file path in Ruby?
9 Answers
9
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