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Which cryptographic hash function should I choose?

...ese properties. A hash function for securing passwords on a server will usually only require preimage resistance, while message digests require all three. It has been shown that MD5 is not collision resistant, however, that does not preclude its use in applications that do not require collision res...
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Postgresql: password authentication failed for user “postgres”

I have installed PostgreSQL 8.4, Postgres client and Pgadmin 3. Authentication failed for user "postgres" for both console client and Pgadmin. I have typed user as "postgres" and password "postgres", because it worked before. But now authentication is failed. I did it before a couple of times withou...
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What package naming convention do you use for personal/hobby projects in Java?

...ge names for personal projects. I assume because this is because this is really a matter of personal taste. 12 Answers ...
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Mipmap drawables for icons

...when building an APK for hdpi devices. If you're building a single APK for all devices, then this doesn't really matter as the launcher can access the drawable resources for the desired density. The actual mipmap API from 4.3. I haven't used this and am not familiar with it. It's not used by the And...
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How does the ARM architecture differ from x86? [closed]

Is the x86 Architecture specially designed to work with a keyboard while ARM expects to be mobile? What are the key differences between the two? ...
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Nginx 403 forbidden for all files

I have nginx installed with PHP-FPM on a CentOS 5 box, but am struggling to get it to serve any of my files - whether PHP or not. ...
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What is the difference between XMLHttpRequest, jQuery.ajax, jQuery.post, jQuery.get

...w what these are, you should check HTTP protocol and learn a little. Internally these two functions use jQuery.ajax but they use particular settings that you don't have to set yourself thus simplifying GET or POST request compared to using jQuery.ajax. GET and POST being the most used HTTP methods a...
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How does MySQL process ORDER BY and LIMIT in a query?

...not 1): SELECT * FROM tbl LIMIT 5,10; # Retrieve rows 6-15 To retrieve all rows from a certain offset up to the end of the result set, you can use some large number for the second parameter. This statement retrieves all rows from the 96th row to the last: SELECT * FROM tbl LIMIT 95,18446744073...
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How does Apple know you are using private API?

...since I do not work in the Apple review team. 1. otool -L This will list all libraries the app has linked to. Something clearly you should not use, like IOKit and WebKit can be detected by this. 2. nm -u This will list all linked symbols. This can detect Undocumented C functions such as _UIIma...
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ExpandableListView - hide indicator for groups with no children

... Try this >>> for all items getExpandableListView().setGroupIndicator(null); In xml android:groupIndicator="@null" share | improve this...