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What does the PHP error message “Notice: Use of undefined constant” mean?
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You should quote your array keys:
$department = mysql_real_escape_string($_POST['department']);
$name = mysql_real_escape_string($_POST['name']);
$email = mysql_real_escape_string($_POST['email']);
$message = mysql_real_escape_string($_POST['mess...
hexadecimal string to byte array in python
...f values of different types. I wish to convert this Hex String into a byte array so that I can shift each value out and convert it into its proper data type.
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Generate unique random numbers between 1 and 100
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For example: To generate 8 unique random numbers and store them to an array, you can simply do this:
var arr = [];
while(arr.length < 8){
var r = Math.floor(Math.random() * 100) + 1;
if(arr.indexOf(r) === -1) arr.push(r);
}
console.log(arr);
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Large Object Heap Fragmentation
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The CLR uses the LOH to preallocate a few objects (such as the array used for interned strings). Some of these are less than 85000 bytes and thus would not normally be allocated on the LOH.
It is an implementation detail, but I assume the reason for this is to avoid unnecessary garbage...
Mongoose subdocuments vs nested schema
...ing the Schema adding _id, that makes sense but I created a schema with an array of sub-docs and an array of object literals and an _id was added to both. Has the behavior changed?
– Drew Goodwin
May 3 '16 at 17:12
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Format bytes to kilobytes, megabytes, gigabytes
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function formatBytes($bytes, $precision = 2) {
$units = array('B', 'KB', 'MB', 'GB', 'TB');
$bytes = max($bytes, 0);
$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
$pow = min($pow, count($units) - 1);
// Uncomment one of the following alternatives
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initializer_list and move semantics
...surprised by this, as I'd thought that initializer_list existed to keep an array of temporaries until they were move'd.
begin and end for initializer_list return const T *, so the result of move in your code is T const && — an immutable rvalue reference. Such an expression can't meaningfu...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...
...什么了，这个模式也不是说改了数据库就可以在生产环境使用。更改 innodb_force_recovery=1 ， 如果不成修改为 2,3,4,5,6。直到可以 查询出数据为止，然后dump出来。数据就备份出来了。 h、把所有数据导出后，在新的数据库导入。所...
Explicitly select items from a list or tuple
... the same as the 4th.
Another option would be to start out with a numpy.array which allows indexing via a list or a numpy.array:
>>> import numpy
>>> myBigList = numpy.array(range(1000))
>>> myBigList[(87, 342, 217, 998, 500)]
Traceback (most recent call last):
File ...
Why start an ArrayList with an initial capacity?
The usual constructor of ArrayList is:
11 Answers
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