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How to check if string input is a number? [duplicate]
How do I check if a user's string input is a number (e.g. -1 , 0 , 1 , etc.)?
24 Answers
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Commenting in a Bash script inside a multiline command
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207
This will have some overhead, but technically it does answer your question:
echo abc `#Put you...
How do I add a submodule to a sub-directory?
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edited Jul 9 '18 at 11:30
mbx
5,51066 gold badges5454 silver badges8585 bronze badges
answered Jan 27 ...
How do I tell git to always select my local version for conflicted merges on a specific file?
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140
On the specific instance of a config file, I would agree with Ron's answer:
a config should be "...
Sort Go map values by keys
...as input
m := make(map[int]string)
m[1] = "a"
m[2] = "c"
m[0] = "b"
// To store the keys in slice in sorted order
keys := make([]int, len(m))
i := 0
for k := range m {
keys[i] = k
i++
}
sort.Ints(keys)
// To perform the opertion you want
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What should I do if the current ASP.NET session is null?
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edited Jun 20 at 9:12
Community♦
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answered Sep 5 '09 at 8:51
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Java SafeVarargs annotation, does a standard or best practice exist?
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edited Dec 11 '18 at 13:30
Blake
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answered Jan 10 '13 at 6:43
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Include intermediary (through model) in responses in Django Rest Framework
...yanph, serializers.field was renamed to serializers.ReadOnlyField in DRF 3.0, so this should read:
class MembershipSerializer(serializers.HyperlinkedModelSerializer):
id = serializers.ReadOnlyField(source='group.id')
name = serializers.ReadOnlyField(source='group.name')
class Meta:
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Algorithm to detect intersection of two rectangles?
...e = v(n) - v(n-1)
You can get a perpendicular to this by rotating it by 90°. In 2D this is easy as:
rotated.x = -unrotated.y
rotated.y = unrotated.x
So no trigonometry or slopes involved. Normalizing the vector to unit-length is not required either.
If you want to test if a point is on o...
Check for changes to an SQL Server table?
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answered Aug 2 '08 at 5:20
Jon GallowayJon Galloway
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