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Why were pandas merges in python faster than data.table merges in R in 2012?
...sely with R's own global string hash table. Some benchmark results are already reported by test.data.table() but that code isn't hooked up yet to replace the levels to levels match.
Are pandas merges faster than data.table for regular integer columns? That should be a way to isolate the algorithm ...
How to force JS to do math instead of putting two strings together
I need javascript to add 5 to an integer variable, but instead it treats the variable as a string, so it write out the variable, then add 5 onto the end of the "string". How can I force it to do math instead?
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Is there a MySQL option/feature to track history of changes to records?
...it becomes unwieldy. For instance, if the business wants to know "find the addresses of the letters we should have sent to customers who had outstanding, unpaid invoices on the first day of the month", you likely have to trawl half a dozen audit tables.
Instead, you can bake the concept of change o...
What are the benefits of dependency injection containers?
...se another component to mimic a banking integration, or do a performance load), this can be easily handled (this does come under the benefits of configuring the DI side of an IoC though.
Additionally if your app is used either at multiple sites (with different server and component configuration) or...
Performance optimization strategies of last resort [closed]
There are plenty of performance questions on this site already, but it occurs to me that almost all are very problem-specific and fairly narrow. And almost all repeat the advice to avoid premature optimization.
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How to assign bean's property an Enum value in Spring config file?
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Michael
31.9k99 gold badges5252 silver badges9494 bronze badges
answered Feb 5 '09 at 17:18
krosenvoldkrosenvold
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What are transparent comparators?
...ainers work?
No, not by default.
The new member function template overloads of find etc. allow you to use a type that is comparable with the container's key, instead of using the key type itself. See N3465 by Joaquín Mª López Muñoz for rationale and a detailed, carefully written proposal to ...
Show pending migrations in rails
...d Sep 20 '19 at 6:57
Malik Shahzad
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answered Jan 25 '11 at 17:58
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AngularJs: Reload page
I want to reload the page. How can I do this?
13 Answers
13
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Difference between Role and GrantedAuthority in Spring Security
...eals with "roles" (like the RoleVoter, the hasRole expression etc.) always adds the ROLE_ prefix for you. So hasAuthority('ROLE_ADMIN') means the the same as hasRole('ADMIN') because the ROLE_ prefix gets added automatically. See the spring security 3 to 4 migration guide for futher information.
Bu...