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How can I pass a list as a command-line argument with argparse?
....add_argument('--default')
# Telling the type to be a list will also fail for multiple arguments,
# but give incorrect results for a single argument.
parser.add_argument('--list-type', type=list)
# This will allow you to provide multiple arguments, but you will get
# a list of lists which is not d...
In Perl, how can I read an entire file into a string?
...
Add:
local $/;
before reading from the file handle. See How can I read in an entire file all at once?, or
$ perldoc -q "entire file"
See Variables related to filehandles in perldoc perlvar and perldoc -f local.
Incidentally, if you can pu...
Automatic Retina images for web sites
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There is a new attribute for the img tag that allows you to add a retina src attribute, namely srcset. No javascript or CSS needed, no double loading of images.
<img src="low-res.jpg" srcset="high-res.jpg 2x">
Browser Support: http://caniuse....
Flat file databases [closed]
... "and_one" => "more");
and to save or update the db record for that user.
$dir = "../userdata/"; //make sure to put it bellow what the server can reach.
file_put_contents($dir.$user['name'],serialize($user));
and to load the record for the user
function &get_user($name){
...
LEN function not including trailing spaces in SQL Server
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NOTE: For DATALENGTH you'll also need to divide the result by 2 if the expression being tested is a wide character type (Unicode; nchar, nvarchar or ntext), since the result is in bytes, not characters.
– devs...
mysqli or PDO - what are the pros and cons? [closed]
In our place we're split between using mysqli and PDO for stuff like prepared statements and transaction support. Some projects use one, some the other. There is little realistic likelihood of us ever moving to another RDBMS.
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C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术
...&lSecondLBound);
SafeArrayGetUBound(psa, 2, &lSecondUBound);
for (long i = lFirstLBound; i <= lFirstUBound; i++)
{
index[0] = i;
for (long j = lSecondLBound; j <= lSecondUBound; j++)
{
index[1] = j;
lon...
What is JSONP, and why was it created?
...t not JSONP. Wikipedia's document on JSON is (was) the top search result for JSONP. It says this:
10 Answers
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How do I force Postgres to use a particular index?
How do I force Postgres to use an index when it would otherwise insist on doing a sequential scan?
6 Answers
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How to define object in array in Mongoose schema correctly with 2d geo index
I'm currently having problems in creating a schema for the document below. The response from the server always returns the "trk" field values as [Object]. Somehow I have no idea how this should work, as I tried at least all approaches which made sense to me ;-)
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