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How to find the size of an array in postgresql
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112
As vyegorov mentioned, array_length will do the trick. Or if you know that the array is 1-dim...
How do I make an html link look like a button?
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219
Apply this class to it
.button {
font: bold 11px Arial;
text-decoration: none;
ba...
How do I validate a date string format in python?
...ncorrect data format, should be YYYY-MM-DD")
>>> validate('2003-12-23')
>>> validate('2003-12-32')
Traceback (most recent call last):
File "<pyshell#20>", line 1, in <module>
validate('2003-12-32')
File "<pyshell#18>", line 5, in validate
raise Valu...
How to check a string for specific characters?
...# original answer given, but less Pythonic than the above...
s.find('$')==-1 # not found
s.find('$')!=-1 # found
And so on for other characters.
... or
pattern = re.compile(r'\d\$,')
if pattern.findall(s):
print('Found')
else
print('Not found')
... or
chars = set('0123456789$,')
if an...
How to share my Docker-Image without using the Docker-Hub?
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251
Docker images are stored as filesystem layers. Every command in the Dockerfile creates a layer. ...
Create a variable name with “paste” in R?
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125
You can use assign (doc) to change the value of perf.a1:
> assign(paste("perf.a", "1", sep...
Prevent flicker on webkit-transition of webkit-transform [duplicate]
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edited May 23 '17 at 12:18
Community♦
111 silver badge
answered Oct 13 '10 at 8:21
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Is there a better way to write this null check, and a non-empty check, in groovy?
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212
There is indeed a Groovier Way.
if(members){
//Some work
}
does everything if members is...
Convert dmesg timestamp to custom date format
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182
Understanding dmesg timestamp is pretty simple: it is time in seconds since the kernel started...
Maven: best way of linking custom external JAR to my project?
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