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Adding 'serial' to existing column in Postgres
...imary key) which currently contains unique sequential integers starting at 1, but which was not created using the 'serial' keyword.
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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...
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....
Explain the use of a bit vector for determining if all characters are unique
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12 Answers
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Background image jumps when address bar hides iOS/Android/Mobile Chrome
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21 Answers
21
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Responsive website zoomed out to full width on mobile
...ead..
<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...
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...
What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
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281
+100
I create...
Can't connect to local MySQL server through socket '/tmp/mysql.sock
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