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Java List.add() UnsupportedOperationException
...tation supports the add() method.
One common example is the List returned by Arrays.asList(): it is documented not to support any structural modification (i.e. removing or adding elements) (emphasis mine):
Returns a fixed-size list backed by the specified array.
Even if that's not the specifi...
Maven parent pom vs modules pom
...s, common plugins etc. (I'm assuming the parent but I've often been bitten by this and they've ended up in each project rather than a common one).
Honestly, I don't know how to not give a general answer here (like "use the level at which you think it makes sense to mutualize things"). And anywa...
Test for existence of nested JavaScript object key
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You have to do it step by step if you don't want a TypeError because if one of the members is null or undefined, and you try to access a member, an exception will be thrown.
You can either simply catch the exception, or make a function to test the...
Good open source django project for learning [closed]
... and Fein-CMS are both good CMS projects to dive into, and the screencasts by Eric are terrific - I absolutely suggest any noob to Django watch all 13 of those screencasts.
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Java: getMinutes and getHours
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From the Javadoc for Date.getHours
As of JDK version 1.1, replaced by Calendar.get(Calendar.HOUR_OF_DAY)
So use
Calendar rightNow = Calendar.getInstance();
int hour = rightNow.get(Calendar.HOUR_OF_DAY);
and the equivalent for getMinutes.
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How do .gitignore exclusion rules actually work?
...n optional prefix ! which negates the pattern; any matching file excluded by a previous pattern will become included again.
i.e., the file has to have been excluded already to be included again. Hope that sheds some light.
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See line breaks and carriage returns in editor
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VI shows newlines (LF character, code x0A) by showing the subsequent text on the next line.
Use the -b switch for binary mode. Eg vi -b filename or vim -b filename --.
It will then show CR characters (x0D), which are not normally used in Unix style files, as the cha...
Trust Anchor not found for Android SSL Connection
...r, and it will even tell you the solution:
"The certificate is not signed by a trusted authority (checking against Mozilla's root store). If you bought the certificate from a trusted authority, you probably just need to install one or more Intermediate certificates. Contact your certificate provide...
Can I call memcpy() and memmove() with “number of bytes” set to zero?
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As said by @You, the standard specifies that the memcpy and memmove should handle this case without problem; since they are usually implemented somehow like
void *memcpy(void *_dst, const void *_src, size_t len)
{
unsigned char ...
Difference Between Cohesion and Coupling
...ting Staff related data. They don't perform actions that should be managed by another class.
– Antonio Pantano
Oct 14 '16 at 22:09
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