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How to customize the back button on ActionBar
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So you can change it programmatically easily by using homeAsUpIndicator() function that added in android API level 18 and upper.
ActionBar().setHomeAsUpIndicator(R.drawable.ic_yourindicator);
If you use support library
getSupportActionBar().setHomeAsUpI...
Are list-comprehensions and functional functions faster than “for loops”?
...like map() , filter() and reduce() faster than a for loop? Why, technically, they run in a C speed , while the for loop runs in the python virtual machine speed ?.
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How to run a program without an operating system?
...or, and then install it to a disk.
Here we create one with a single printf call:
printf '\364%509s\125\252' > main.img
sudo apt-get install qemu-system-x86
qemu-system-x86_64 -hda main.img
Outcome:
Note that even without doing anything, a few characters are already printed on the screen. Those ...
Should I use Java's String.format() if performance is important?
...tely for each approach, the '+' operator, String.format and StringBuilder (calling toString()), so the memory used will not be affected by other approaches.
I added more concatenations, making the string as "Blah" + i + "Blah"+ i +"Blah" + i + "Blah".
The result are as follow (average of 5 runs eac...
What's the difference between a file descriptor and file pointer?
...other Unix-like systems.
You pass "naked" file descriptors to actual Unix calls, such as read(), write() and so on.
A FILE pointer is a C standard library-level construct, used to represent a file. The FILE wraps the file descriptor, and adds buffering and other features to make I/O easier.
You p...
Pass Method as Parameter using C#
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How would the Func call change if the Method has as signature of returning void and no parameters? I can't seem to get the syntax to work.
– user31673
Jan 17 '10 at 21:38
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Get name of property as a string
... This is badass and very useful for ModelState.AddModelError calls.
– Michael Silver
Dec 12 '15 at 19:09
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How does StartCoroutine / yield return pattern really work in Unity?
... like gameplay triggers, that do nothing most frames, but occasionally are called upon to do critical work. And you’ve got assorted processes between the two.
Whenever you’re creating a process that will take place over multiple frames – without multithreading – you need to find some wa...
How do I programmatically change file permissions?
In Java, I'm dynamically creating a set of files and I'd like to change the file permissions on these files on a linux/unix file system. I'd like to be able to execute the Java equivalent of chmod . Is that possible Java 5? If so, how?
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Creating C formatted strings (not printing them)
...see snprintf for a safer version).
A terminating null character is automatically appended after the
content.
After the format parameter, the function expects at least as many
additional arguments as needed for format.
Parameters:
str
Pointer to a buffer where the resulting C-string is stored. The...