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How do I use a PriorityQueue?
...which compares in the appropriate way for your sort order. If you give an example of how you want to sort, we can provide some sample code to implement the comparator if you're not sure. (It's pretty straightforward though.)
As has been said elsewhere: offer and add are just different interface meth...
sed one-liner to convert all uppercase to lowercase?
I have a textfile in which some words are printed in ALL CAPS. I want to be able to just convert everything in the textfile to lowercase, using sed . That means that the first sentence would then read, 'i have a textfile in which some words are printed in all caps.'
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Programmatically obtain the Android API level of a device?
...level programatically by the system constant (Build.VERSION.SDK_INT). For example you can run some piece of code which requires newer API in the following way (it will execute if the current device's API level is at least 4)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.DONUT) {
}
To obtai...
SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?
...t puts null values in for the unpopulated fields.
This wikipedia article explains the various types of joins with examples of output given a sample set of tables.
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Objective-C : BOOL vs bool
...T_OS_WATCH
typedef bool BOOL;
#else
typedef signed char BOOL;
// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
// even if -funsigned-char is used.
#endif
#define YES ((BOOL)1)
#define NO ((BOOL)0)
So, yes, you can assume that BOOL is a char. You can use the (C99) bool type,...
How to find all occurrences of an element in a list?
index() will just give the first occurrence of an item in a list. Is there a neat trick which returns all indices in a list for an element?
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How to save a BufferedImage as a File
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Also, make sure that outputfile exists. If it doesn't, write() will (incorrectly) throw a NullPointerException
– Cody S
Oct 23 '14 at 18:52
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How to show line number when executing bash script
... which has a lot of commands and will generate lots of output, I use set -x or set -v and set -e , so the script would stop when error occurs. However, it's still rather difficult for me to locate which line did the execution stop in order to locate the problem.
Is there a method which can outp...
Determine version of Entity Framework I am using?
..., click the item, then check the runtime version number in the Properties explorer, you will see the sub version as well. Mine for instance shows runtime version v4.0.30319 with the Version property showing 4.0.0.0. The EntityFramework.dll can be viewed in this fashion also. Only the Version will be...
How to search for a string in cell array in MATLAB?
...n is good because it works for multiple data types, but it only works for exact matches. If you need a case-insensitive match, see stackoverflow.com/a/9433112/44737. If you need to match something more complex like a regex or a field in a structure, see stackoverflow.com/a/8061808/44737
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