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Efficiency of purely functional programming
Does anyone know what is the worst possible asymptotic slowdown that can happen when programming purely functionally as opposed to imperatively (i.e. allowing side-effects)?
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How do you delete an ActiveRecord object?
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It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_des...
Hibernate problem - “Use of @OneToMany or @ManyToMany targeting an unmapped class”
I'm finding my feet with Hibernate Annotations and I've hit a problem I hope someone can help with.
7 Answers
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What is the difference between “Include Directories” and “Additional Include Directories”
In configuration properties of my project, under the "VC++ directories" there is an entry for "Include Directories". But under "C/C++" option, there is another entry called "Additional Include Directories". Same thing happens with library directories.
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When increasing the size of VARCHAR column on a large table could there be any problems?
I'm using SQL Server 2008 and I need to make a VARCHAR field bigger, from (200 to 1200) on a table with about 500k rows. What I need to know is if there are any issues I have not considered.
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Multiple select statements in Single query
I am generating a report in php (mysql),
6 Answers
6
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Why start a shell command with a backslash?
Why is the command starting with \ ?
This is the site where I saw it.
2 Answers
2
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django 1.5 - How to use variables inside static tag
I'm currently migrating all the static files references in my project to the new {% static %} tag that django 1.5 introduced, but I'm having a problem, in some places I use variables to get the content. With the new tag I can't, is there any way to solve this?
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Spring CrudRepository findByInventoryIds(List inventoryIdList) - equivalent to IN clause
...pring CrudRepository, do we have support for "IN clause" for a field? ie something similar to the following?
3 Answers
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How to add \newpage in Rmarkdown in a smart way?
I wonder if one could simply use LaTeX \newpage command in R markdown v2 in a different way than this:
3 Answers
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