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PDO closing connection
... to keep in mind when using persistent connections. One is that when using table locking on a persistent connection, if the script for whatever reason cannot release the lock, then subsequent scripts using the same connection will block indefinitely and may require that you either restart the httpd ...
Can I concatenate multiple MySQL rows into one field?
...ead of a group—and concatenate on a certain field.
Let's say you have a table of product ids and their names and prices:
+------------+--------------------+-------+
| product_id | name | price |
+------------+--------------------+-------+
| 13 | Double Double | 5 |...
Assembly code vs Machine code vs Object code?
... machine code file in a text editor you would see garbage, including unprintable characters (no, not those unprintable characters ;) ).
Object code is a portion of machine code not yet linked into a complete program. It's the machine code for one particular library or module that will make up the co...
HashMap and int as key
...putForNullKey(value);
int hash = hash(key);
int i = indexFor(hash, table.length);
for (Entry<K,V> e = table[i]; e != null; e = e.next) {
Object k;
if (e.hash == hash && ((k = e.key) == key || key.equals(k))) {
V oldValue = e.value;
e....
What is the difference between Trap and Interrupt?
..., I/O ports, etc). These are asynchronous (i.e. they don't happen at predictable places in the user code) or "passive" since the interrupt handler has to wait for them to happen eventually.
You can also see a trap as a kind of CPU-internal interrupt since the handler for trap handler looks like an ...
MySQL Results as comma separated list
... you can use just concat()
Select concat(Col1, ',', Col2) as Foo_Bar from Table1;
edit this only works in mySQL; Oracle concat only accepts two arguments. In oracle you can use something like select col1||','||col2||','||col3 as foobar from table1;
in sql server you would use + instead of pipes....
Do I have to guard against SQL injection if I used a dropdown?
...yway would look something like this:
curl --data "size=%27%29%3B%20DROP%20TABLE%20*%3B%20--" http://www.example.com/profile/save
(This might not be a totally valid curl command, but again, I hope I've gotten my point across.)
So, I'll reiterate:
NEVER trust user input. ALWAYS protect yourself....
LINQ: “contains” and a Lambda query
...
here I'm try to match my userType form user type table to user table for t collect department head name hope sa
– mohit vijay chaudhari
Sep 4 at 9:31
...
jquery change class name
...<option>Jen</option>
</select>
</div>
<table id="theTable">
<tr><td id="cellToChange">Bob</td><td>Sam</td></tr>
<tr><td>Sue</td><td>Jen</td></tr>
</table>
</body>
So...
Remove all whitespace in a string
...ctly one argument (2 given) for me. Docs says that argument is a translate table, see string.maketrans(). But see comment by Amnon Harel, below.
– user405
Sep 3 '17 at 21:07
...