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How to define @Value as optional
...r example was @Value("${myValue:DEFAULT}").
You are not limited to plain strings as default values. You can use SPEL expressions, and a simple SPEL expression to return null is:
@Value("${myValue:#{null}}")
share
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GCC -g vs -g3 GDB Flag: What is the Difference?
...ging information. On most systems that use stabs format, -g
enables use of extra debugging information that only GDB can use; this
extra information makes debugging work better in GDB but probably
makes other debuggers crash or refuse to read the program. If you want
to control for certain whether t...
Iterate a list as pair (current, next) in Python
...
This should really be the answer, it doesn't rely on any extra imports and works great.
– jamescampbell
Sep 27 '18 at 13:09
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How to write a foreach in SQL Server?
...e hints.
This is the proc code:
CREATE PROC [dbo].[PRC_FOREACH] (@TBL VARCHAR(100) = NULL, @EXECUTE NVARCHAR(MAX)=NULL, @DB VARCHAR(100) = NULL) AS BEGIN
--LOOP BETWEEN EACH TABLE LINE
IF @TBL + @EXECUTE IS NULL BEGIN
PRINT '@TBL: A TABLE TO MAKE OUT EACH LINE'
PRINT '@EX...
Call a “local” function within module.exports from another function in module.exports?
...d answer. If you define functions outside of the exports scope, it adds an extra level of indirection, and while it can be desirable sometimes, it makes it more complicated, to refactor, e.g. rename the function, of find usage of the function, etc.
– Pierre Henry
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How to reshape data from long to wide format
...
And, as of data.table v1.9.6 we can cast on multiple columns
## add an extra column
dat1[, value2 := value * 2]
## cast multiple value columns
dcast(dat1, name ~ numbers, value.var = c("value", "value2"))
# name value_1 value_2 value_3 value_4 value2_1 value2_2 value2_3 ...
Converting numpy dtypes to native python types
...pn.item()
print('{0} ({1!r}) -> {2}'.format(name, npn.dtype.char, type(nat)))
except:
pass
There are a few NumPy types that have no native Python equivalent on some systems, including: clongdouble, clongfloat, complex192, complex256, float128, longcomplex, longdo...
Django rest framework nested self-referential objects
... For anyone new viewing this question, I found that for each extra recursive level, I had to a repeat of the last line in the second edit. Strange workaround, but seems to work.
– Jeremy Blalock
Apr 11 '13 at 0:55
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Is there a JavaScript function that can pad a string to get to a determined length?
...und this solution here and this is for me much much simpler:
var n = 123
String("00000" + n).slice(-5); // returns 00123
("00000" + n).slice(-5); // returns 00123
(" " + n).slice(-5); // returns " 123" (with two spaces)
And here I made an extension to the string object:
String.prototype.pa...
How can you determine a point is between two other points on a line segment?
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Yes, the extra parenthesis is just a typo. 4 years have passed before someone said something. :)
– Cyrille Ka
Nov 22 '12 at 3:36
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