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Rails: update_attribute vs update_attributes
... the long description but what I want to say is important. save(perform_validation = true), if perform_validation is false it bypasses (skips will be the proper word) all the validations associated with save.
For second question
Also, what is the correct syntax to pass a hash to update_attribu...
Difference between @OneToMany and @ElementCollection?
...
Thanks Peder for the answer! You've a valid point there since @OneToMany can only relate entities.
– n_g
Jan 23 '12 at 9:03
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What's wrong with foreign keys?
...t get Orphaned Rows
you can get nice "on delete cascade" behavior, automatically cleaning up tables
knowing about the relationships between tables in the database helps the Optimizer plan your queries for most efficient execution, since it is able to get better estimates on join cardinality.
FKs gi...
how does array[100] = {0} set the entire array to 0?
...ory.
int foo(void)
{
char array[100] = {0};
...
}
In this case at every call of the function foo you will have a hidden memset.
The code above is equivalent to
int foo(void)
{
char array[100];
memset(array, 0, sizeof(array));
....
}
and if you omit the initializer your array will contain ra...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...enchAdvisor {
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3 private static final String PERSPECTIVE_ID = " cn.blogjava.youxia.rcp_start.perspective " ;
4
5 public WorkbenchWindowAdvisor createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer configurer) {
6 return new ApplicationWorkbenchWindo...
Convert generic List/Enumerable to DataTable?
...ble table = new DataTable();
using(var reader = ObjectReader.Create(data, "Id", "Name", "Description")) {
table.Load(reader);
}
Editor's Dis/claimer: FastMember is a Marc Gravell project. It's gold and full-on flies!
Yes, this is pretty much the exact opposite of this one; reflection would suf...
T-SQL query to show table definition?
... name, type_desc, is_unique, is_primary_key
FROM sys.indexes
WHERE [object_id] = OBJECT_ID('dbo.Customers')
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Multiple submit buttons on HTML form – designate one button as default [duplicate]
...our. You can effectively alter the order using floats. For example:
<p id="buttons">
<input type="submit" name="next" value="Next">
<input type="submit" name="prev" value="Previous">
</p>
with:
#buttons { overflow: hidden; }
#buttons input { float: right; }
will effecti...
Placement of the ng-app directive (html vs body)
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Thanks for the answer! This is basically the conclusion I'd come to, so it's good to hear that others are thinking along the same lines. I'm interested in exactly why it's faster and how much faster it could be, are you able to explain that more or do you hav...
How to give System property to my test via Gradle and -D
..."
println "# test environment: " + systemProperties['env']
...
}
I'm calling my test task using -Penv=dev and I get my 'dev' value in my print, or 'prod' if I do not send any value, which is the expected behavior for me.
Value is also accessible on java side, using System.getProperty("env").
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