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Can two different strings generate the same MD5 hash code?
... echo '4dc968ff0ee35c209572d4777b721587d36fa7b21bdc56b74a3dc0783e7b9518afbfa200a8284bf36e8e4b55b35f427593d849676da0d1555d8360fb5f07fea2' | xxd -r -p | tee >/dev/null >(md5) >(sha1sum)
c6b384c4968b28812b676b49d40c09f8af4ed4cc -
008ee33a9d58b51cfeb425b0959121c9
$ echo '4dc968ff0ee35c209572d...
How to find gaps in sequential numbering in mysql?
... next_id, (b - a) -1 AS missing_inbetween
FROM
(
SELECT a1.id AS a , MIN(a2.id) AS b
FROM arrc_vouchers AS a1
LEFT JOIN arrc_vouchers AS a2 ON a2.id > a1.id
WHERE a1.id <= 100
GROUP BY a1.id
) AS tab
WHERE
b > a + 1
This will give you a table showing the id that has ids missing abov...
Any way to properly pretty-print ordered dictionaries?
...dDict
d=OrderedDict([
('a', OrderedDict([
('a1',1),
('a2','sss')
])),
('b', OrderedDict([
('b1', OrderedDict([
('bb1',1),
('bb2',4.5)])),
('b2',4.5)
])),
])
I do
def dict_or_OrdDict_to_formatted_str(OD, mode='dict', s="", in...
PHP function overloading
...tion(string '.$key.')', __function__);
// Get a reference
$a2 =& Overloadable::refAccess($key); // $a2 =& $GLOBALS['val'];
$a2 *= 3; // change the reference value
}
}
//----------------------------------------------------------
// Some data to work with:
$val ...
Return empty cell from formula in Excel
...elf annihilating formula. Put in cell, say B2, the following formula:
=IF(A2=0,GetTrueBlank,A2)
The above formula in B2 will evaluate to trueblank, if you type 0 in A2.
You can download a demonstration file here.
In the example above, evaluating formula to trueblank results in an empty cell. C...
How do I perform the SQL Join equivalent in MongoDB?
...: 'orlando', last: 'becerra' },
age: 27
},
{
_id: 'a2',
name: { first: 'mayra', last: 'sanchez' },
age: 21
}
]);
.- Categories:
db.categories.insert([
{
_id: 'c1',
name: 'sci-fi'
},
{
_id: 'c2',
name: 'romance...
Using fonts with Rails asset pipeline
...c: url("/assets/fontawesome-webfont-d4f5a99224154f2a808e42a441ddc9248ffe78b7a4083684ce159270b30b912a.eot" "?v=4.4.0");
src: url("/assets/fontawesome-webfont-d4f5a99224154f2a808e42a441ddc9248ffe78b7a4083684ce159270b30b912a.eot" "?#iefix&v=4.4.0") format("embedded-opentype"), url("/assets/font...
How to use > in an xargs command?
...
Tudor Timi
6,68511 gold badge1616 silver badges4444 bronze badges
answered May 10 '09 at 18:59
Stephan202Stephan202
...
Get top n records for each group of grouped results
...VALUES('Laura',2,39);
SELECT a.* FROM mytable AS a
LEFT JOIN mytable AS a2
ON a.groupname = a2.groupname AND a.age <= a2.age
GROUP BY a.person
HAVING COUNT(*) <= 2
ORDER BY a.groupname, a.age DESC;
gives me:
a.person a.groupname a.age
---------- ----------- ----------
Sha...
How to do an INNER JOIN on multiple columns
...
something like....
SELECT f.*
,a1.city as from
,a2.city as to
FROM flights f
INNER JOIN airports a1
ON f.fairport = a1. code
INNER JOIN airports a2
ON f.tairport = a2. code
share
|
...