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How can I get the SQL of a PreparedStatement?
...aining placeholders
it is sent to the DB server
and prepared there
which means the SQL statement is "analysed", parsed, some data-structure representing it is prepared in memory
And, then, you have bound variables
which are sent to the server
and the prepared statement is executed -- working on...
Where can I get a list of Ansible pre-defined variables?
...e pretty weak in some areas, I think it's probably off-putting to newbs. I mean, I can't make head-nor-tail of using tags with include_tasks, seems to result in odd behaviour
– Tom H
Mar 17 '18 at 22:46
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Wait until all jQuery Ajax requests are done?
...ects as arguments, and executes a function when all of them resolve.
That means, if you want to initiate (for example) four ajax requests, then perform an action when they are done, you could do something like this:
$.when(ajax1(), ajax2(), ajax3(), ajax4()).done(function(a1, a2, a3, a4){
// t...
How to use php serialize() and unserialize()
...cture beyond a single run of a script, you need to serialize it. That just means to put the structure into a "lower common denominator" that can be handled by things other than PHP, like databases, text files, sockets. The standard PHP function serialize is just a format to express such a thing, it ...
What is difference between cacerts and keystore?
...e of using self-signed certificates for test servers: a mistake because it means you're using different code paths in test and in production.
– Marquis of Lorne
Oct 26 '15 at 22:21
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Sending websocket ping/pong frame from browser
...
Ping is meant to be sent only from server to client, and browser should answer as soon as possible with Pong OpCode, automatically. So you have not to worry about that on higher level.
Although that not all browsers support standard...
Select objects based on value of variable in object using jq
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I'm not sure what you mean by parent (do you mean key?)... it's just jq 'keys' json. If you meant the keys after the filter, giving "FOO" "BAR", use this answer and use .key instead of [.key, .value.name].
– ggorlen
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Does Ruby have a string.startswith(“abc”) built in method?
... though:
if SomeString.match(/^abc/)
# SomeString starts with abc
^ means "start of string" in regular expressions
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psycopg2: insert multiple rows with one query
...... ] # as many as you have columns.
sqlrows = []
rowsPerInsert = 3 # more means faster, but with diminishing returns..
for row in getSomeData:
# row == [1, 'a', 'yolo', ... ]
sqlrows += row
if ( len(sqlrows)/len(valueSQL) ) % rowsPerInsert == 0:
# sqlrows == ...
Simulate airplane mode in iPhone Simulator
...some workplaces have computers that have real authentication problems that mean killing your network connection isn't always an option (as everything goes haywire).
– occulus
Feb 22 '11 at 9:23
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