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How do I use reflection to call a generic method?
...the method name as a string in Type.GetMethod and arguments as the objects array in MethodInfo.Invoke.
Below is a simple example that illustrates how some errors can be caught at compile time (commented code) and other at runtime. It also shows how the DLR tries to resolve which method to call.
in...
Using StringWriter for XML Serialization
...s sense. If you want to store data in a different encoding, you use a byte array instead.
SQL Server works on a similar principle; any string passed into an xml column must be encoded as UTF-16. SQL Server will reject any string where the XML declaration does not specify UTF-16. If the XML declarat...
How to change the CHARACTER SET (and COLLATION) throughout a database?
... separately.
I simply used a Perl script to return all these alters as an array and iterated over them, fixed the columns that were too long (generally they were varchar(256) when the data generally only had 20 characters in them so that was an easy fix).
I found some data was corrupted when alter...
Difference between Python's Generators and Iterators
...uples, lists, dictionaries, sets, frozen sets, strings, byte strings, byte arrays, ranges and memoryviews:
>>> all(isinstance(element, collections.Iterable) for element in (
(), [], {}, set(), frozenset(), '', b'', bytearray(), range(0), memoryview(b'')))
True
Iterators require a...
How do I pass variables and data from PHP to JavaScript?
...code()d.
// You can json_encode() any value in PHP, arrays, strings,
//even objects.
index.php (or whatever the actual page is named like)
<!-- snip -->
<script>
function reqListener () {
console.log(this.responseText);
}
...
Fastest hash for non-cryptographic uses?
...e others.
<?php
set_time_limit(720);
$begin = startTime();
$scores = array();
foreach(hash_algos() as $algo) {
$scores[$algo] = 0;
}
for($i=0;$i<10000;$i++) {
$number = rand()*100000000000000;
$string = randomString(500);
foreach(hash_algos() as $algo) {
$start =...
How do I choose grid and block dimensions for CUDA kernels?
...nGridSize, &blockSize, MyKernel, 0, N);
// Round up according to array size
gridSize = (N + blockSize - 1) / blockSize;
cudaEventRecord(stop, 0);
cudaEventSynchronize(stop);
cudaEventElapsedTime(&time, start, stop);
printf("Occupancy calculator elapsed time: %3....
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...y
[['foo'], [], []]
>>> l
[['foo'], [], []]
The list is just an array of pointers to the contents, so a shallow copy just copies the pointers, and so you have two different lists, but they have the same contents. To make copies of the contents, you need a deep copy.
Deep copies
To make ...
How to access property of anonymous type in C#?
...s type too. The easiest way to do this is to project a sequence such as an array into a list, e.g.
var nodes = (new[] { new { Checked = false, /* etc */ } }).ToList();
Then you'll be able to access it like:
nodes.Any(n => n.Checked);
Because of the way the compiler works, the following then...
Integrating the ZXing library directly into my Android application
...final String NOTE_KEY = "NOTE_KEY";
// When using Type.CONTACT, these arrays provide the keys for adding or retrieving multiple phone numbers and addresses.
public static final String[] PHONE_KEYS = {
ContactsContract.Intents.Insert.PHONE, ContactsContract.Intents.Insert.SECONDA...