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How to use php serialize() and unserialize()
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edited May 15 '13 at 7:15
answered Dec 27 '11 at 6:54
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How to convert a string of bytes into an int?
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answered Jan 14 '09 at 20:52
Greg HewgillGreg Hewgill
783k167167 gold badges10841084 silver badges12221222 bronze badges
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Find all records which have a count of an association greater than zero
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[10] pry(main)> Comment.distinct.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, 5, 13, 22, 16, 6, 53]
[11] pry(main)> _.size
=> 17
[12] pry(main)> Article.joins(:comments).size
=> 45
[13] pry(main)> Article.joins(:comments).distinct.size
=> 17
[14] pry(ma...
master branch and 'origin/master' have diverged, how to 'undiverge' branches'?
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1045
You can review the differences with a:
git log HEAD..origin/master
before pulling it (fetch +...
How to import CSV file data into a PostgreSQL table?
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785
Take a look at this short article.
Solution paraphrased here:
Create your table:
CREATE TAB...
Passing a method as a parameter in Ruby
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sigma = args.first || 10.0
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end
def weightedknn(data, vec1, k = 5, weightf = gaussian)
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weight = weightf.call(dist)
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end
Just note that you can't set a default argument in a block declaration like that. So you need to use a splat and setup the default in the proc code itsel...
javascript set a variable if undefined
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edited Mar 24 at 6:25
Viktor Borítás
7911 silver badge88 bronze badges
answered Mar 23 '11 at 18...
How to use JNDI DataSource provided by Tomcat in Spring?
...resql.Driver"
initialSize="20"
maxWaitMillis="15000"
maxTotal="75"
maxIdle="20"
maxAge="7200000"
testOnBorrow="true"
validationQuery="select 1"
/>
</GlobalNamingResources>
And r...
What's the common practice for enums in Python? [duplicate]
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Van GaleVan Gale
40.8k99 gold badges6565 silver badges7878 bronze badges
15
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