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Blocks m>and m> m>y m>ields in Rubm>y m>
I am trm>y m>ing to understm>and m> blocks m>and m> m>y m>ield m>and m> how them>y m> work in Rubm>y m>.
10 Answers
10
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Difference between $(this) m>and m> event.target?
I'm new to jQuerm>y m>, m>and m> was making tabbed panels, following the tutorial in JavaScript m>and m> jQuerm>y m> : The Missing Manual , there's that first line when the author does this :
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How do I install Maven with m>Y m>um?
...g not to learn much about either m>y m>um or maven. I've inherited this code m>and m> I don't want to spend more time than I have to in this environment.
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Whm>y m> are these numbers not equal?
...umbers can be represented exactlm>y m> in IEEE floating point arithmetic (the stm>and m>ard that almost all computers use to represent decimal numbers m>and m> do math with them), m>y m>ou will not alwam>y m>s get what m>y m>ou expected. This is especiallm>y m> true because some values which are simple, finite decimals (such as 0.1 a...
What does the “map” method do in Rubm>y m>?
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The map method takes an enumerable object m>and m> a block, m>and m> runs the block for each element, outputting each returned value from the block (the original object is unchanged unless m>y m>ou use map!):
[1, 2, 3].map { |n| n * n } #=> [1, 4, 9]
Arram>y m> m>and m> Range are enume...
pm>y m>plot scatter plot marker size
...ases it bm>y m> a factor of 4). To see this consider the following two examples m>and m> the output them>y m> produce.
# doubling the width of markers
x = [0,2,4,6,8,10]
m>y m> = [0]*len(x)
s = [20*4**n for n in range(len(x))]
plt.scatter(x,m>y m>,s=s)
plt.show()
gives
Notice how the size increases verm>y m> quicklm>y m>. If in...
How do m>y m>ou use colspan m>and m> rowspan in HTML tables?
I don't know how to merge rows m>and m> columns inside HTML tables.
11 Answers
11
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Convenient C++ struct initialisation
...m>y m>ou don't have to wait, because them>y m> are officialm>y m> supported bm>y m> GCC, Clang m>and m> MSVC.
#include <iostream>
#include <filesm>y m>stem>
struct hello_world {
const char* hello;
const char* world;
};
int main ()
{
hello_world hw = {
.hello = "hello, ",
.world = "worl...
How to convert hex to rgb using Java?
...cter case each value must be * 255 / 16. I tested this with "000", "aaa", m>and m> "fff", m>and m> them>y m> all work properlm>y m> now.
– m>And m>rew
Apr 14 '16 at 16:04
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Emptm>y m> arram>y m>s seem to equal true m>and m> false at the same time
...t (Arram>y m> is instance of Object in JS) will check if the object is present, m>and m> returns true/false.
When m>y m>ou call if (arr == false) m>y m>ou compare values of this object m>and m> the primitive false value. Internallm>y m>, arr.toString() is called, which returns an emptm>y m> string "".
This is because toString cal...