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Spark java.lang.OutOfMemoryError: Java heap space
... longer need to play with these values, spark will determine them automatically.
Similar to above but shuffle memory fraction. If your job doesn't need much shuffle memory then set it to a lower value (this might cause your shuffles to spill to disk which can have catastrophic impact on speed). So...
How to properly seed random number generator
...se if you're setting the seed to the time in a fast loop, you'll probably call it with the same seed many times.
In your case, as you're calling your randInt function until you have a different value, you're waiting for the time (as returned by Nano) to change.
As for all pseudo-random libraries, ...
How can I know which radio button is selected via jQuery?
...before needed blah blah ) but for pure performance this works faster especially in older browsers: $("#myform").find("input[type='radio']:checked").val();
– Mark Schultheiss
Aug 3 '15 at 4:45
...
Java: convert List to a String
...
StringJoiner is especially useful if one wants to join to something like [a, b, c] including the braces.
– koppor
Feb 17 '16 at 6:26
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Is it possible to change only the alpha of a rgba background colour on hover?
...solute on the <div> tag
Option 1: ::before psuedo-element:
.before_method{
position:relative;
}
.before_method:before{
display:block;
content:" ";
position:absolute;
z-index:-1;
background:rgb(18, 176, 41);
top:0;
left:0;
right:0;
bottom:0;
opacity:0.5;
}
.before_metho...
Programmatically selecting text in an input field on iOS devices (mobile Safari)
How do you programmatically select the text of an input field on iOS devices, e.g. iPhone, iPad running mobile Safari?
10 A...
How do you unit test a Celery task?
...def add(x, y):
return x + y
And your test:
from nose.tools import eq_
def test_add_task():
rst = add.apply(args=(4, 4)).get()
eq_(rst, 8)
Hope that helps!
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Algorithm to detect intersection of two rectangles?
... if you can find a line that separates the two objects. e.g. the objects / all points of an object are on different sides of the line.
The fun thing is, that it's sufficient to just check all edges of the two rectangles. If the rectangles don't overlap one of the edges will be the separating axis....
how to make svn diff show only non-whitespace line changes between two revisions
... can use
svn diff -r 100:200 -x -b > file.diff
If you want to ignore all whitespaces:
svn diff -x -w | less
Source
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How to use icons and symbols from “Font Awesome” on Native Android Application
...entry in strings.xml for each icon. Eg for a heart:
<string name="icon_heart">&#xf004;</string>
Referenced said entry in the view of my xml layout:
<Button
android:id="@+id/like"
style="?android:attr/buttonStyleSmall"
...
android:text="@string/icon_heart" ...