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Java: Instanceof and Generics
...ok like this:
if (arg0 != null && !(this.type.isAssignableFrom(arg0.getClass()))
{
return -1;
}
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How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
...
This is an old question, yet I had the same problem when moving from JDK 1.8.0_144 to jdk 1.8.0_191
We found a hint in the changelog:
Changelog
we added the following additional system property, which helped in our case to solve this issue:
-Dcom.sun.jndi.ldap.object.disableEndpointId...
Why does ConcurrentHashMap prevent null keys and values?
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From the author of ConcurrentHashMap himself (Doug Lea):
The main reason that nulls aren't allowed in ConcurrentMaps
(ConcurrentHashMaps, ConcurrentSkipListMaps) is that ambiguities that
may be just barely tolerable i...
Are there disadvantages to using a generic varchar(255) for all text-based fields?
...uestion with MySQL, I'll mention a MySQL-specific tip: as rows are copied from the storage engine layer to the SQL layer, VARCHAR fields are converted to CHAR to gain the advantage of working with fixed-width rows. So the strings in memory become padded out to the maximum length of your declared V...
Why should I implement ICloneable in c#?
Can you explain to me why I should inherit from ICloneable and implement the Clone() method?
4 Answers
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img src SVG changing the styles with CSS
...y can write anything on this platform. MDN: "This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped"
– vsync
Sep 15 '18 at 7:05
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How to assign colors to categorical variables in ggplot2 that have stable mapping?
...levels in multiple data frames can become tedious if they are being pulled from separate files and not all factor levels appear in each file.
One way to address this is to create a custom manual colour scale as follows:
#Some test data
dat <- data.frame(x=runif(10),y=runif(10),
grp = re...
byte[] to file in Java
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From the doc: NOTE: As from v1.3, the parent directories of the file will be created if they do not exist.
– bmargulies
Dec 3 '10 at 21:51
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Clojure: cons (seq) vs. conj (list)
...e operation (in this case it would probably reduce to 1 + 3 -- the 1 comes from linear traversal over the first element, the 3 comes from (next (cons 4 '(1 2 3)) being a PersistentList and thus Counted).
The intention behind the names is, I believe, that cons means to cons(truct a seq)1, whereas co...
jQuery on window resize
... (win.width() >= 1280) { /* ... */ }
});
How do I stop my resize code from executing so often!?
This is the first problem you'll notice when binding to resize. The resize code gets called a LOT when the user is resizing the browser manually, and can feel pretty janky.
To limit how often your ...