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Regular expression for a hexadecimal number?
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How about the following?
0[xX][0-9a-fA-F]+
Matches expression starting with a 0, following by either a lower or uppercase x, followed by one or more characters in the ranges 0-9, or a-f, or A-F
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What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
...en I explain it to myself in one of two ways:
If you think of the columns starting out horizontally, then you can choose when you want them to stack.
For example, if you start with columns:
A B C
You decide when should they stack to be like this:
A
B
C
If you choose col-lg, then the colum...
Get raw POST body in Python Flask regardless of Content-Type header
...):
self.application = application
def __call__(self, environ, start_response):
length = int(environ.get('CONTENT_LENGTH') or 0)
body = environ['wsgi.input'].read(length)
environ['body_copy'] = body
# replace the stream since it was exhausted by read()
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git rebase, keeping track of 'local' and 'remote'
...into),
remote is B
A rebase switches ours (current branch before rebase starts) and theirs (the branch on top of which you want to rebase).
kutschkem points out that, in a GUI mergetool context:
local references the partially rebased commits: "ours" (the upstream branch)
remote refers to ...
Find if variable is divisible by 2
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@sadmicrowave: we all start out as beginners at some point. The real problem is the lack of informative tutorials out there. The tutorials for absolute beginners should clarify the difference between JavaScript and jQuery and they just dive stra...
Opposite of %in%: exclude rows with values specified in a vector
...y operators can be used as operators. and operators are either built-in or start and end with %. To create an operator, you need to assign a function with two operands to a name starting and ending with %.
– flying sheep
Mar 15 '19 at 16:41
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Select mySQL based only on month and year
...an index on the Date column.
<?php
$date = $_POST['period'];
$start = strtotime($date);
$end = strtotime($date . ' 1 month - 1 second');
$query = sprintf(
'SELECT *
FROM projects
WHERE Date BETWEEN FROM_UNIXTIME(%u) AND FROM_UNIXTIME(%u)',
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Javascript Equivalent to PHP Explode()
...where 0 is the first
//Since we skipped the first element in the array, we start at 1
var myvar = myarr[1] + ":" + myarr[2];
// Show the resulting value
console.log(myvar);
// 'TEMP:data'
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Transaction isolation levels relation with locks on table
... on the table
For example, you have 3 concurrent processes A, B and C. A starts a transaction, writes data and commit/rollback (depending on results). B just executes a SELECT statement to read data. C reads and updates data. All these process work on the same table T.
READ UNCOMMITTED - no lock...
Python name mangling
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You shouldn't start with private data and make it public as necessary. Rather, you should start by figuring out the interface of your object. I.e. you should start by figuring out what the world sees (the public stuff) and then figure out ...