大约有 43,066 项符合查询结果（耗时：0.0305秒） [XML]
How can I check if character in a string is a letter? (Python)
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195
You can use str.isalpha().
For example:
s = 'a123b'
for char in s:
print(char, char.isa...
Bash if statement with multiple conditions throws an error
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251
Use -a (for and) and -o (for or) operations.
tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01....
What do (lambda) function closures capture?
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163
Your second question has been answered, but as for your first:
what does the closure captu...
Can I change the viewport meta tag in mobile safari on the fly?
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148
I realize this is a little old, but, yes it can be done. Some javascript to get you started:
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PHP Sort Array By SubArray Value
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edited May 23 '17 at 12:10
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answered Mar 19 '10 at 13:14
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Count number of occurences for each unique value
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Mapping a function on the values of a map in Clojure
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How do you convert epoch time in C#?
...ow do you convert Unix epoch time into real time in C#? (Epoch beginning 1/1/1970)
14 Answers
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How to count TRUE values in a logical vector
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179
There are some problems when logical vector contains NA values.
See for example:
z <- c(TR...
Responsive website zoomed out to full width on mobile
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
This tells smaller device browsers how to scale the page. You can read more about this here: https://developer.apple.com/library/content/documentation/AppleApplications/Reference/SafariWebContent/Usi...