大约有 21,000 项符合查询结果（耗时：0.0319秒） [XML]
looping through an NSMutableDictionary
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A standard way would look like this
for(id key in myDict) {
id value = [myDict objectForKey:key];
[value doStuff];
}
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Is there an auto increment in sqlite?
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You get one for free, called ROWID. This is in every SQLite table whether you ask for it or not.
If you include a column of type INTEGER PRIMARY KEY, that column points at (is an alias for) the automatic ROWID column.
ROWID (by whatever name you call it)...
Change the name of the :id parameter in Routing resources for Rails
...he post is https://thoughtbot.com/blog/rails-patch-change-the-name-of-the-id-parameter-in
5 Answers
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UPDATE multiple tables in MySQL using LEFT JOIN
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UPDATE t1
LEFT JOIN
t2
ON t2.id = t1.id
SET t1.col1 = newvalue
WHERE t2.id IS NULL
Note that for a SELECT it would be more efficient to use NOT IN / NOT EXISTS syntax:
SELECT t1.*
FROM t1
WHERE t1.id NOT IN
(
SELECT id
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Unable to copy ~/.ssh/id_rsa.pub
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DISPLAY=:0 xclip -sel clip < ~/.ssh/id_rsa.pub didn't work for me (ubuntu 14.04), but you can use :
cat ~/.ssh/id_rsa.pub
to get your public key
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SQL query for finding records where count > 1
I have a table named PAYMENT . Within this table I have a user ID, an account number, a ZIP code and a date. I would like to find all records for all users that have more than one payment per day with the same account number.
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Print Current Mercurial Revision Hash?
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Try:
hg id -i
Example:
$ hg id -i
adc56745e928
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Is there a “not in” operator in JavaScript for checking object properties?
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Just negate your condition, and you'll get the else logic inside the if:
if (!(id in tutorTimes)) { ... }
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Yii2 data provider default sorting
...nk there's proper solution. Configure the yii\data\Sort object:
$dataProvider = new ActiveDataProvider([
'query' => $query,
'sort'=> ['defaultOrder' => ['topic_order' => SORT_ASC]],
]);
Official doc link
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How to get a Docker container's IP address from the host
...{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_name_or_id
Old Docker client syntax is:
docker inspect --format '{{ .NetworkSettings.IPAddress }}' container_name_or_id
These commands will return the Docker container's IP address.
As mentioned in the comments: if you are on W...