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How can I parse a string with a comma thousand separator to a number?
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Removing commas is potentially dangerous because, as others have mentioned in the comments, many locales use a comma to mean something different (like a decimal place).
I don't know where you got your string from, but in some places in the world "2,299.00" = 2.299
The Intl object could have b...
Why use a ReentrantLock if one can use synchronized(this)?
...'m trying to understand what makes the lock in concurrency so important if one can use synchronized (this) . In the dummy code below, I can do either:
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MySQL “incorrect string value” error when save unicode string in Django
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None of these answers solved the problem for me. The root cause being:
You cannot store 4-byte characters in MySQL with the utf-8 character set.
MySQL has a 3 byte limit on utf-8 characters (yes, it's wack, nicely summed up...
What is android:weightSum in android, and how does it work?
... the sum of the weights inside the layout accomplishes nothing, but if someone changes it in the future it could cause headaches as now there is an unnecessary modifier to the layout that would have to be found and changed. This answer is incorrect and should not be the accepted answer.
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How to change a module variable from another module?
...ile bar.py. You could set bar.bar.a if you wanted to change that.
This is one of the dangers of using the from foo import bar form of the import statement: it splits bar into two symbols, one visible globally from within foo which starts off pointing to the original value and a different symbol vis...
What does {0} mean when initializing an object?
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One thing to be aware of is that this technique will not set padding bytes to zero. For example:
struct foo
{
char c;
int i;
};
foo a = {0};
Is not the same as:
foo a;
memset(&a,0,sizeof(a));
In the first ...
How to copy yanked text to VI command prompt
...;ctl-w>
This eschews yanking to paste into the command line; instead, one pastes the word under one's cursor directly onto the command line. E.g.:
:%s/<ctl-r><ctl-w>/foo/g
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What is meant by Scala's path-dependent types?
..., giving a sort of type safety that is dependent on values and not types alone.
This might sound like dependent types, but it is more limited. For example, the type of occupied is dependent on the value of Board. Above, the last line doesn't work because the type of c2 is b2.Coordinate, while occup...
Enumerable.Empty() equivalent for IQueryable
...causes e.g. Union queries to be broken up into multiple queries instead of one.
– NetMage
May 22 '17 at 23:11
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Double decimal formatting in Java
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One of the way would be using NumberFormat.
NumberFormat formatter = new DecimalFormat("#0.00");
System.out.println(formatter.format(4.0));
Output:
4.00
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