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How to set time delay in javascript
...var tid = setInterval(function(){
//called 5 times each time after one second
//before getting cleared by below timeout.
alert("I am setInterval");
},1000); //delay is in milliseconds
alert("after setInterval"); //called second
setTimeout(function(){
clearInterv...
What are the uses for Cross Join?
...g very practical if you were given 2 sets of id's (perhaps in csv format), one set would contain the employee ids and the other would contain task ids. The idea is that you have a M2M table for EmployeeTask. You could use the cross join to assign every given task to every given employee, granted you...
How to move Jenkins from one PC to another
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Got the solution to my problem mentioned in my previous comment: Goto Manage Jenkins > configure system. Here in section 'Jenkins Location', under 'Jenkins URL' field, change the URL to point it to new jenkins server.
– merlachandra
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Is Zookeeper a must for Kafka?
...ke to use only a single broker, single topic and a single partition having one producer and multiple consumers (each consumer getting its own copy of data from the broker). Given this, I do not want the overhead of using Zookeeper; Can I not just use the broker only? Why is a Zookeeper must?
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postgresql COUNT(DISTINCT …) very slow
...nd this thread on www.postgresql.org which discusses the same thing: link. One of the replies (by Jeff Janes) says that COUNT(DISTINCT()) sorts the table to do its work instead of using hash.
– Ankur
Dec 9 '14 at 10:58
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psycopg2: insert multiple rows with one query
I need to insert multiple rows with one query (number of rows is not constant), so I need to execute query like this one:
1...
How do I upload a file with metadata using a REST web service?
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One advantage to sending the content first is that by the time the metadata exists, the content is already present. Ultimately the right answer depends on the organisation of the data in the system.
– Gr...
What is an Intent in Android?
... a messaging object you can use to request an action from another app component
An Intent is basically a message to say you did or want something to happen. Depending on the intent, apps or the OS might be listening for it and will react accordingly. Think of it as a blast email to a bunch of fri...
UITableView : viewForHeaderInSection: not called during reloadData:
...also implement the tableView:titleForHeaderInSection:. You should only use one or the other (viewForHeader or titleForHeader).
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How can I process each letter of text using Javascript?
... represented as either UTF-8 or UTF-16 but not have this problem. The only ones that have the problem are the ones that require four bytes in UTF-16 rather than two bytes. ???? is a character that requires four bytes in UTF-16. Key terms to look up for more info are "astral plane", "non-BMP", and "s...