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How to synchronize a static variable among threads running different instances of a class in Java?
...s on the class object.
public class Test {
private static int count = 0;
public static synchronized void incrementCount() {
count++;
}
}
Explicitly synchronize on the class object.
public class Test {
private static int count = 0;
public void incrementCount() {
...
Asterisk in function call
...
answered Mar 9 '11 at 0:01
CameronCameron
81.8k1818 gold badges172172 silver badges213213 bronze badges
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Why is printing to stdout so slow? Can it be sped up?
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I ran your file writing test on my machine, and with buffering, it also 0.05s here for 100,000 lines.
However, with the above modifications to write unbuffered, it takes 40 seconds to write only 1,000 lines to disk. I gave up waiting for 100,000 lines to write, but extrapolating from the previou...
Simple way to create matrix of random numbers
...
Take a look at numpy.random.rand:
Docstring: rand(d0, d1, ..., dn)
Random values in a given shape.
Create an array of the given shape and propagate it with random
samples from a uniform distribution over [0, 1).
>>> import numpy as np
>>> np....
GraphViz - How to connect subgraphs?
...ue statement is required.
digraph G {
compound=true;
subgraph cluster0 {
a -> b;
a -> c;
b -> d;
c -> d;
}
subgraph cluster1 {
e -> g;
e -> f;
}
b -> f [lhead=cluster1];
d -> e;
c -> g [ltail=cluster0,lhead=cluster1];
c -> e [...
Following git-flow how should you handle a hotfix of an earlier release?
...e.
This thread has more information, with these examples:
git checkout 6.0
git checkout -b support/6.x
git checkout -b hotfix/6.0.1
... make your fix, then:
git checkout support/6.x
git merge hotfix/6.0.1
git branch -d hotfix/6.0.1
git tag 6.0.1
or using git flow commands
git flow support st...
jQuery find element by data attribute value
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Use Attribute Equals Selector
$('.slide-link[data-slide="0"]').addClass('active');
Fiddle Demo
.find()
it works down the tree
Get the descendants of each element
in the current set of matched elements, filtered by a selector, jQuery object, or element.
...
How to run a background task in a servlet based web application?
...ples:
@Singleton
public class BackgroundJobManager {
@Schedule(hour="0", minute="0", second="0", persistent=false)
public void someDailyJob() {
// Do your job here which should run every start of day.
}
@Schedule(hour="*/1", minute="0", second="0", persistent=false)
pu...
Better techniques for trimming leading zeros in SQL Server?
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SUBSTRING(str_col, PATINDEX('%[^0]%', str_col+'.'), LEN(str_col))
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Python strptime() and timezones?
...ormat. This is equivalent to datetime(*(time.strptime(date_string, format)[0:6])).
See that [0:6]? That gets you (year, month, day, hour, minute, second). Nothing else. No mention of timezones.
Interestingly, [Win XP SP2, Python 2.6, 2.7] passing your example to time.strptime doesn't work but if ...