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How to get key names from JSON using jq
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edited Nov 20 '17 at 19:05
answered Jul 6 '17 at 18:21
Ch...
Comparing two dataframes and getting the differences
...hat almost worked for me, except for the filtering step (where I get: ValueError: cannot reindex from a duplicate axis), here is the final solution I used:
# join the dataframes
united_data = pd.concat([data1, data2, data3, ...])
# group the data by the whole row to find duplicates
united_data_grou...
PHP Sort a multidimensional array by element containing date
...s example, does $array need to contain elements $a and $b? - im getting an error invalid compare function
– Tim
May 26 '10 at 6:52
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Django - “no module named django.core.management”
I get the following error when trying to run Django from the command line.
21 Answers
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Check whether variable is number or string in JavaScript
...on assertTrue(value, message) {
if (!value) {
alert("Assertion error: " + message);
}
}
function assertFalse(value, message)
{
assertTrue(!value, message);
}
assertTrue(isString("string literal"), "number literal");
assertTrue(isString(new String("String object")), "String obje...
Symfony 2: How do I check if a user is not logged in inside a template?
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@Ronan, that doesn't work as it results in the following error: No Authentication Provider found for token of class "Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken".
– Harold
Jun 20 '14 at 10:26
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Can gcc output C code after preprocessing?
...s. This is also looks like a useful way to preprocess the code looking for errors in your macros. Great question and a great answer (IALCTHW).
– lee8oi
Dec 11 '18 at 16:07
add...
What is the use case of noop [:] in bash?
...o" != "1" ]
then
#echo Success
fi
Which causes bash to give a syntax error:
line 4: syntax error near unexpected token `fi'
line 4: `fi'
Bash can't have empty blocks (WTF). So you add a no-op:
if [ "$foo" != "1" ]
then
#echo Success
:
fi
or you can use the no-op to comment out...
composer: How to find the exact version of a package?
Suppose I'm writing a library A, that depends on another library, monolog for instance.
5 Answers
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Fix a Git detached head?
...
Why does this error occur in the first place? This is one of the things I hate git for - totally random behavior at times. Never had such problems with Mercurial.
– Violet Giraffe
Oct 7 '14 at 20:36
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