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Fastest way to count exact number of rows in a very large table?
...tract a good estimate by using query optimization tools, table statistics, etc. In the case of PostgreSQL, for instance, you could parse the output of explain count(*) from yourtable and get a reasonably good estimate of the number of rows. Which brings me to your second question.
I have a table...
What is a pre-revprop-change hook in SVN, and how do I create it?
...et action=%5
:: Only allow the log message to be changed, but not author, etc.
if /I not "%propertyName%" == "svn:log" goto ERROR_PROPNAME
:: Only allow modification of a log message, not addition or deletion.
if /I not "%action%" == "M" goto ERROR_ACTION
:: Make sure that the new svn:log message...
Access-control-allow-origin with multiple domains
...ains fairly easy and support multiple Top-Level domains (e.g com, org, net etc.).
– Merlin
Nov 11 '15 at 6:35
4
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psycopg2: insert multiple rows with one query
... do you have to dick around with escaping strings and timestamps etc?
– CpILL
Jun 13 '17 at 9:35
Yes, you'll...
Putting git hooks into repository
...cution>
</executions>
</plugin>
<!-- ... etc ... -->
</plugins>
</build>
When you run your project build the plugin will configure git to run hooks out of the directory specified. This will effectively set up the hooks in that directory for everyo...
How do I make an asynchronous GET request in PHP?
...ycle. Any method of sending a request for a URL (or a SQL statement, or a etc.) is going to wait for some kind of response. You'll need some kind of secondary system running on the local machine to achieve this (google around for "php job queue")
...
Gradients in Internet Explorer 9
...he gradient, or make it more sophisticated (radial gradients, transparency etc.) but this is great for those simple (vertical) linear gradients.
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System.currentTimeMillis vs System.nanoTime
...urrentTimeMillis will not (e.g. if you change the date, hit a leap second, etc.) This is an extremely important distinction for some types of systems.
– charstar
Apr 10 '11 at 10:32
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Most concise way to convert a Set to a List
...set to a list I can't perform any iterative operation on it foreach, sort, etc. I get a NullPointerException, however when I expect my list none of the elements are null, and the only weird I notice is that the index starts at 1. However, if I just create a normal list the index starts at 0. Weird?
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List of standard lengths for database fields
...ng roles, such as LEGAL, MARITAL, MAIDEN, PREFERRED, SOBRIQUET, PSEUDONYM, etc. You might have business rules, such as "a person can only have one legal name at a time, but multiple pseudonyms at a time".
Some examples:
names: [
{
type:"POLYNYM",
role:"LEGAL",
given:"George",
mi...