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Efficiently test if a port is open on Linux?
...o use:
exec 6<>/dev/tcp/ip.addr.of.server/445
echo -e "GET / HTTP/1.0\n" >&6
cat <&6
I'm using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes used by Bash for child processes, so 3,4,6,7,8, and 9 should be safe.
As per the comment below, ...
Is there any boolean type in Oracle databases?
...read on asktom. From recommending CHAR(1) 'Y'/'N' they switch to NUMBER(1) 0/1 when someone points out that 'Y'/'N' depends on the English language, while e.g. German programmers might use 'J'/'N' instead.
The worst thing is that they defend this stupid decision just like they defend the ''=NULL st...
WPF ToolBar: how to remove grip and overflow
...
answered Jun 26 '09 at 20:57
rmoorermoore
14.2k44 gold badges5656 silver badges5959 bronze badges
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Simplest code for array intersection in javascript
... Ry-♦
192k4444 gold badges392392 silver badges403403 bronze badges
answered Dec 11 '09 at 3:08
Anon.Anon.
49.5k88 gold badges...
C dynamically growing array
...lSize) {
a->array = malloc(initialSize * sizeof(int));
a->used = 0;
a->size = initialSize;
}
void insertArray(Array *a, int element) {
// a->used is the number of used entries, because a->array[a->used++] updates a->used only *after* the array has been accessed.
// Th...
How to add a spinner icon to button when it's in the Loading state?
...
101
If you look at the bootstrap-button.js source, you'll see that the bootstrap plugin replaces th...
How do I check in SQLite whether a table exists?
...
1045
I missed that FAQ entry.
Anyway, for future reference, the complete query is:
SELECT name FR...
In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
The following shows that "0" is false in Javascript:
12 Answers
12
...
Cost of len() function
...
360
It's O(1) (constant time, not depending of actual length of the element - very fast) on every ty...
How do I iterate over an NSArray?
...d idiom to iterate over an NSArray. My code needs to be suitable for OS X 10.4+.
8 Answers
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