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How can I build a small operating system on an old desktop computer? [closed]
...stems, and everything else your OS kernel needs to do to get it up to a bootable state. From that point on it's basically a matter of writing device drivers for the hardware you need to support, and offering implementations of the C library functions to make kernel calls for things like opening file...
How to use null in switch
... return null;
}
}
For me, this typically aligns with a look-up table in a database (for rarely-updated tables only).
However, when I try to use findByTypeId in a switch statement (from, most likely, user input)...
int userInput = 3;
PersonType personType = PersonType.findByTypeId(userI...
What are fixtures in programming?
...
and fixed environment in which tests are run so that results are
repeatable. Some people call this the test context.
Examples of fixtures:
Loading a database with a specific, known set of data
Erasing a hard disk and installing a known clean operating system installation
Copyin...
How to “properly” print a list?
...ed characters from a string using its translate() method with None for the table argument followed by a string containing the character(s) you want removed for its deletechars argument.
lst = ['x', 3, 'b']
print str(lst).translate(None, "'")
# [x, 3, b]
If you're using a version of Python befor...
To Workflow or Not to Workflow?
...nderstand and to use WF effectively was considered high. Status transition table describing valid transitions and actions to be taken are used for additional flexibility and developers were comfortable with it, easily understanding the concept and purpose.
Chances of business process changes were sl...
How to remove convexity defects in a Sudoku square?
... :=
ComponentMeasurements[Image[l], "Centroid"][[1, 2]]
gridCenters =
Table[centerOfGravity[
ImageData[Dilation[Image[h], DiskMatrix[2]]]*
ImageData[Dilation[Image[v], DiskMatrix[2]]]], {h,
horizontalGridLineMasks}, {v, verticalGridLineMasks}];
The last step is to define two i...
IOS7 : UIScrollView offset in UINavigationController
...omaticallyAdjustsScrollViewInsets is deprecated
You should now use:
self.tableView.contentInsetAdjustmentBehavior = .never
I also encourage you to check this question and its answer to get a better understanding of those properties
...
Which one is the best PDF-API for PHP? [closed]
...
mpdf unfortunately doesn't seem to handle large table cells well. As soon as the content exceeds a page, it starts to scale down, which makes it useless for any project that has big tables. Apart from that; it's easy to use, performant, and well documented.
...
How to use HTML to print header and footer on every printed page of a document?
...oters in print media.
And while you might be able to simulate it with:
tables
fixed position blocks
they each have bugs that prevent them from being the ideal general solution.
share
|
improve...
Why use symbols as hash keys in Ruby?
...lso saves memory, because they are only stored once.
Ruby Symbols are immutable (can't be changed), which makes looking something up much easier
Short(ish) answer:
Using symbols not only saves time when doing comparisons, but also saves memory, because they are only stored once.
Symbols in Ruby ...