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Catching error codes in a shell pipe
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If you really don't want the second command to proceed until the first is known to be successful, then you probably need to use temporary files. The simple version of that is:
tmp=${TMPDIR:-/tmp}/mine.$$
if ./a > $tmp.1
then
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List All Redis Databases
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Or you can just run the following command and you will see all databases of the Redis instance without firing up redis-cli:
$ redis-cli INFO | grep ^db
db0:keys=1500,expires=2
db1:keys=200000,expires=1
db2:keys=350003,expires=1
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UIScrollView Scrollable Content Size Ambiguity
...st sorted out in this way:
Inside the UIScrollView add a UIView (we can call that contentView);
In this contentView, set top, bottom, left and right margins to 0 (of course from the scrollView which is the superView); Set also align center horizontally and vertically;
Finished.
Now you can add ...
Turning a Comma Separated string into individual rows
...F(String, 1, CHARINDEX(',', String + ','), '')
FROM Testdata
UNION all
SELECT
SomeID,
OtherID,
LEFT(String, CHARINDEX(',', String + ',') - 1),
STUFF(String, 1, CHARINDEX(',', String + ','), '')
FROM tmp
WHERE
String > ''
)
SELECT
S...
Sending event when AngularJS finished loading
...at's the best way to detect the finish of page loading/bootstrapping, when all directives done compiling/linking.
12 Answer...
How to create a tag with Javascript?
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FYI, document.head is supported in all major browsers.
– Rob W
Feb 23 '12 at 18:12
30
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How is it possible to declare nothing inside main() in C++ and yet have a working application after
...own in the following question (which I had asked long back):
Is main() really start of a C++ program?
Note that such code is not safe and should be best avoided in general. For example, the std::cout object may not be initialized when print_fibs() is executed, if so then what would std::cout do...
Hide all but $(this) via :not in jQuery selector
...d, if you're clicking something within the table to try and get it to hide all the table rows EXCLUDING the row containing the item you clicked, use: $('tr').not($(this).closest('tr')).hide();
– Jimbo
Jan 18 '13 at 12:54
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psql: FATAL: Peer authentication failed for user “dev”
...t evaluated as a "local" connect as you might see in pg_hba.conf:
local all all peer
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linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... prot opt source destination
Chain RH-Firewall-1-INPUT (0 references)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 ...