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What is a good Hash Function?
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Hsieh's hash function is awful, with an order of magnitude more collisions than we want. In particular, strings that differ only in the last 4 bytes can collide easily. If you have a 30 character string, that differ in the last 4 bytes, after 28 bytes have been pro...
error opening HPROF file: IOException: Unknown HPROF Version
...s directory nevertheless. I had to chmod permissions in that directory in order for it to work.
– IgorGanapolsky
Feb 23 '12 at 23:56
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How do I use JDK 7 on Mac OSX?
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Note that in order to make applications use Oracle's Java 1.7 in favor of Apple's Java 1.6, I had to run /Library/Java/JavaVirtualMachines/1.7.0.jdk and drag "Java SE 7" to the top of the list on the "General" tab. This will also make jav...
Remove empty strings from a list of strings
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Instead of if x, I would use if X != '' in order to just eliminate empty strings. Like this:
str_list = [x for x in str_list if x != '']
This will preserve None data type within your list. Also, in case your list has integers and 0 is one among them, it will also b...
How to solve “Plugin execution not covered by lifecycle configuration” for Spring Data Maven Builds
... like that error is due to a missing <pluginManagement> tag. So, in order to avoid the exceptions in Eclipse, one needs to simply enclose all the plugin tags inside a <pluginManagement> tag, like so:
<build>
<pluginManagement>
<plugins>
<plu...
Collections.emptyMap() vs new HashMap()
... then returning a view to the underlying collection makes perfect sense in order to make sure that a "bad" client does not accidentally modify collections owned by you. Returning an empty collection instead of null means that your client does not have to make a null check before using the collection...
Why can't I use an alias in a DELETE statement?
...ble to other tables/views to get a reduced set of rows. E.g. delete o from Order as o inner join Customer as c on c.CustomerID = o.CustomerID where c.ArchiveOrders = 1
– Andrew Jens
Aug 31 '17 at 2:03
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'App not Installed' Error on Android
... version of my App1 (note the original App1 was at the top in Alphabetical order which was deleted as above). When clicking on the pale version it said "Not installed for this user". (I had set up my nexus to have more than one user). But in the top right corner there is a three dot button. I presse...
Array versus linked-list
...t, i.e. that data structure that allows duplicate elements in an arbitrary order, that’s not suitable and you would have to go great lengths to make a data structure like LinkedList a concurrently updatable thing. If you only need a concurrent queue or deque, well yes, there are even existing exam...
How can I bring my application window to the front? [duplicate]
.... Form has inherited this from Control, and it can be used to change the z-order of the Form when it is an MDI child - i.e. the Form is hosted in another Form. It will not bring a form in front of another application.
– jo0ls
Nov 5 '15 at 10:22
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