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Alter a MySQL column to be AUTO_INCREMENT
I’m trying to modify a table to make its primary key column AUTO_INCREMENT after the fact. I have tried the following SQL, but got a syntax error notification.
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Is it possible to update a localized storyboard's strings?
I localized a part of my application with creating a base.lproj storyboard and 3 string files for it. It was a month ago and after that I added new view controller to app, but this controller's buttons and labels not appear in string files
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The tilde operator in Python
What's the usage of the tilde operator in Python?
7 Answers
7
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MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
as the title says, I want to perform a find (one) for a document, by _id, and if doesn't exist, have it created, then whether it was found or was created, have it returned in the callback.
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Socket.io rooms difference between broadcast.to and sockets.in
Socket.io's readme contains the following example:
5 Answers
5
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Replace values in list using Python [duplicate]
...w list with a list comprehension:
new_items = [x if x % 2 else None for x in items]
You can modify the original list in-place if you want, but it doesn't actually save time:
items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for index, item in enumerate(items):
if not (item % 2):
items[index...
Why is $$ returning the same id as the parent process?
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$$ is defined to return the process ID of the parent in a subshell; from the man page under "Special Parameters":
$ Expands to the process ID of the shell. In a () subshell, it expands to the process ID of the current shell,...
Reshaping data.frame from wide to long format
...e to get used to, just as melt/cast. Here is a solution with reshape, assuming your data frame is called d:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:...
WHERE vs HAVING
...columns you create yourself (for example select 1 as "number" ) after HAVING and not WHERE in MySQL?
7 Answers
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Creating and Update Laravel Eloquent
What's the shorthand for inserting a new record or updating if it exists?
13 Answers
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