大约有 36,010 项符合查询结果（耗时：0.0492秒） [XML]
Best way to convert strings to symbols in hash
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In Ruby >= 2.5 (docs) you can use:
my_hash.transform_keys(&:to_sym)
Using older Ruby version? Here is a one-liner that will copy the hash into a new one with the keys symbolized:
my_hash = my_hash.inject({}){|memo,(k,v)| memo[k.to_sy...
What is an API key? [closed]
...somewhat limited experience, the public/private distinction has nothing to do with public key crypto. The "public" keys I've seen are typically "access lite" -- in other words, a key you can distribute to grant third parties access to non-sensitive data, without giving away the keys to the kingdom....
ggplot2 plot without axes, legends, etc
I want to use bioconductor's hexbin (which I can do) to generate a plot that fills the entire (png) display region - no axes, no labels, no background, no nuthin'.
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What is Linux’s native GUI API?
Both Windows (Win32 API) and OS X (Cocoa) have their own APIs to handle windows, events and other OS stuff. I have never really got a clear answer as to what Linux’s equivalent is?
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What is aria-label and how should I use it?
...r to type their name into the input box where id="fmUserName".
aria-label does much the same thing, but it's for those cases where it isn't practical or desirable to have a label on screen. Take the MDN example:
<button aria-label="Close" onclick="myDialog.close()">X</button>`
Most p...
Validating parameters to a Bash script
...^[0-9]+$' || die "Numeric argument required, $1 provided"
while read dir
do
[ -d "$dir" ] || die "Directory $dir does not exist"
rm -rf "$dir"
done <<EOF
~/myfolder1/$1/anotherfolder
~/myfolder2/$1/yetanotherfolder
~/myfolder3/$1/thisisafolder
EOF
edit: I missed the part about ch...
How to commit no change and new message?
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There's rarely a good reason to do this, but the parameter is --allow-empty for empty commits (no files changed), in contrast to --allow-empty-message for empty commit messages. You can also read more by typing git help commit or visiting the online documen...
What is the difference between old style and new style classes in Python?
...r need to use type(x). If I'm not subclassing a built in type, then there doesn't seem to be any advantage that I can see of the new-style classes. There is a disadvantage, which is the extra typing of (object).
– recursive
May 3 '11 at 12:45
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Linux, Why can't I write even though I have group permissions?
... directory owned by the staff group which I am a member of. Why can I not do this?
6 Answers
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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
... O(1) to O(n) worst case. Can enumerate the value and keys properties, and do key/val pairs
Dictionary - same as above only strongly typed via generics, such as Dictionary<string, string>
SortedList - a sorted generic list. Slowed on insertion since it has to figure out where to put things. Ca...