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UIView's frame, bounds, center, origin, when to use what?
...coordinate system and bounds is using coordinate of the local view (therefore its x and y are 0, but not always), but it's still confusing to me when to use what.
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C# - Multiple generic types in one list
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+10 for this! I don't know why this compiles.. Exactly what I needed!
– Odys
Dec 20 '11 at 22:45
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C++ const map element access
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at() is a new method for std::map in C++11.
Rather than insert a new default constructed element as operator[] does if an element with the given key does not exist, it throws a std::out_of_range exception. (This is similar to the behaviour of at...
What is the difference between compile code and executable code?
... process where source code files are converted into executable code.
While for simple programs the process consists of a single file being compiled, for complex software the source code may consist of many files and may be combined in different ways to produce many different versions.
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How to get and set the current web page scroll position?
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You're looking for the document.documentElement.scrollTop property.
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Rails mapping array of hashes onto single hash
...an array sort of like sticking a method call between each element of it.
For example [1, 2, 3].reduce(0, :+) is like saying 0 + 1 + 2 + 3 and gives 6.
In our case we do something similar, but with the merge function, which merges two hashes.
[{:a => 1}, {:b => 2}, {:c => 3}].reduce({}, ...
Is there an equivalent to e.PageX position for 'touchstart' event as there is for click event?
...r fingers, you can find them in other indices of the touches list.
UPDATE FOR NEWER JQUERY:
$(document).on('touchstart', '#box', function(e) {
var xPos = e.originalEvent.touches[0].pageX;
});
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Example for sync.WaitGroup correct?
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Yes, this example is correct. It is important that the wg.Add() happens before the go statement to prevent race conditions. The following would also be correct:
func main() {
var wg sync.WaitGroup
wg.Add(1)
go dosomething(200, &wg)
wg.Add(1)
go dosomething(400, &wg)
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Plot logarithmic axes with matplotlib in python
...d look like:
import pylab
import matplotlib.pyplot as plt
a = [pow(10, i) for i in range(10)]
fig = plt.figure()
ax = fig.add_subplot(2, 1, 1)
line, = ax.plot(a, color='blue', lw=2)
ax.set_yscale('log')
pylab.show()
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make arrayList.toArray() return more specific types
... ArrayList<String>();
String[] a = list.toArray(new String[0]);
Before Java6 it was recommended to write:
String[] a = list.toArray(new String[list.size()]);
because the internal implementation would realloc a properly sized array anyway so you were better doing it upfront. Since Java6 t...