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Get value from JToken that may not exist (best practices)
...ypes and the ?? operator:
width = jToken.Value<double?>("width") ?? 100;
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Why should casting be avoided? [closed]
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answered Nov 12 '10 at 17:51
Jerry CoffinJerry Coffin
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mysql - how many columns is too many?
...able structure should reflect your domain model; if you really do have 70 (100, what have you) attributes that belong to the same entity there's no reason to separate them into multiple tables.
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Soft wrap at 80 characters in Vim in window of arbitrary width
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Sridhar Sarnobat
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answered Jun 12 '09 at 22:16
Brian CarperBrian C...
Round a double to 2 decimal places [duplicate]
...) throw new IllegalArgumentException();
long factor = (long) Math.pow(10, places);
value = value * factor;
long tmp = Math.round(value);
return (double) tmp / factor;
}
This breaks down badly in corner cases with either a very high number of decimal places (e.g. round(1000.0d, 17)...
How to wait for a keypress in R?
...}
onKeybd <- function(key)
{
keyPressed <<- key
}
xaxis=c(1:10) # Set up the x-axis.
yaxis=runif(10,min=0,max=1) # Set up the y-axis.
plot(xaxis,yaxis)
for (i in xaxis)
{
# On each keypress, color the points on the graph in red, one by one.
points(i,yaxis[i],col="red", pch=19...
RuntimeError on windows trying python multiprocessing
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edited Jul 17 '18 at 10:12
answered Aug 13 '13 at 9:10
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How to compare arrays in C#? [duplicate]
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answered Feb 10 '12 at 6:33
AMingAMing
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What is the difference between float and double?
...are calculated:
double has 52 mantissa bits + 1 hidden bit: log(253)÷log(10) = 15.95 digits
float has 23 mantissa bits + 1 hidden bit: log(224)÷log(10) = 7.22 digits
This precision loss could lead to greater truncation errors being accumulated when repeated calculations are done, e.g.
float a = ...
How to compare types
...?
– Brent Waggoner
Jan 12 '15 at 18:10
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