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How can query string parameters be forwarded through a proxy_pass with nginx?
... token is ""(empty str) for original request without args,because $is_args concat any var will be `?`
if ($is_args) { # if the request has args update token to "&"
set $token "&";
}
location /test {
set $args "${args}${token}k1=v1&k2=v2"; # update original append custom params ...
How to access pandas groupby dataframe by key
...ionally - turn it all back into a single dataframe object
sampled_df = pd.concat(df_list, axis=0, join='outer')
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Calling dynamic function with dynamic number of parameters [duplicate]
...= ['myarg here'];
for(i=0; i<arguments.length; i++) args = args.concat(arguments[i]);
console.log.apply(this, args);
}
}
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How to sort a dataFrame in python pandas by two or more columns?
... pd.DataFrame(np.random.randint(1, 5, (10,2)), columns=['a','b'])
df1 = pd.concat([df1]*100000)
def pdsort(df1):
return df1.sort_values(['a', 'b'], ascending=[True, False])
def lex(df1):
arr = df1.values
return pd.DataFrame(arr[np.lexsort((-arr[:, 1], arr[:, 0]))])
assert (pdsort(df1)...
Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
...or is expected to for decades. The prime example is compiling X11, macro "Concat3" is broken, it's result is now MISNAMED C Identifier, which of course fails to build. and i'm beginning to thing build fails are their profession.
I think the answer here is "new C that breaks standards is bad C", t...
How can I generate random alphanumeric strings?
...
@Adam: Yes, you could concat the result of multiple calls to GetRandomFileName but then (a) you'd lose your performance advantage, and (b) your code would become more complicated.
– LukeH
Aug 28 '09 at 9:08
...
How to split the name string in mysql?
...
DECLARE delim VARCHAR(1);
SET delim = '|';
SET inipos = 1;
SET fullstr = CONCAT(fullstr, delim);
SET maxlen = LENGTH(fullstr);
REPEAT
SET endpos = LOCATE(delim, fullstr, inipos);
SET item = SUBSTR(fullstr, inipos, endpos - inipos);
IF item <> '' AND item IS NOT NULL THEN ...
How to find index of all occurrences of element in array?
...
array.reduce((a, e, i) => (e === value) ? a.concat(i) : a, [])
– yckart
Dec 21 '16 at 20:46
...
String.Join method that ignores empty strings?
...nce you can do it in SQL directly:
PostgreSQL & MySQL:
SELECT
concat_ws(' / '
, NULLIF(searchTerm1, '')
, NULLIF(searchTerm2, '')
, NULLIF(searchTerm3, '')
, NULLIF(searchTerm4, '')
) AS RPT_SearchTerms;
And even with the glorious MS-SQL-Server it'...
Using LINQ to concatenate strings
...bit slower, actually. Even using Aggregate with a StringBuilder instead of concatenation is slower than String.Join.
– Joel Mueller
May 7 '09 at 20:33
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