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What is the difference between Non-Repeatable Read and Phantom Read?
...ransaction reads committed UPDATES from another transaction. The same row now has different values than it did when your transaction began.
Phantom reads are similar but when reading from committed INSERTS and/or DELETES from another transaction. There are new rows or rows that have disappeared s...
How to set session timeout in web.config
... Wait for a minute to pass, then hit refresh. The session id will change.
Now, if my guess is correct, you want to make your users log out as soon as the session times out. For doing this, you can rig up a login page which will verify the user credentials, and create a session variable like this -
...
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...avoid for large data, and why := and set() were introduced to data.table.
Now, with our copied newDT we can modify it by reference :
newDT
# a b
# [1,] 1 11
# [2,] 2 200
newDT[2, b := 400]
# a b # See FAQ 2.21 for why this prints newDT
# [1,] 1 11
# [2,] 2 400
.Internal(in...
Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie
...ename value"
(Use multiple lines if you want to set multiple variables)
Now save (⌘+s) as File format: Application. Finally open System Settings → Users & Groups → Login Items and add your new application.
[Original answer]: To work around this place all the variables you wish to defin...
What is the exact difference between currentTarget property and target property in javascript
...ag you will get two alert and a single alert on clicking the form tag.
And now see the following code,
<style>
body * {
margin: 10px;
border: 1px solid blue;
}
</style>
<script>
function fun(event){
alert(event.target+" "+event.currentTarget);
}
</...
How to convert List to int[] in Java? [duplicate]
...r approach. That's a significantly stronger assertion than saying I don't know whether or not there is a better approach.
– Jon Skeet
Jun 20 '16 at 13:50
|...
How do I tell Maven to use the latest version of a dependency?
...
Now I know this topic is old, but reading the question and the OP supplied answer it seems the Maven Versions Plugin might have actually been a better answer to his question:
In particular the following goals could be of use...
C# vs C - Big performance difference
...employ some expert level optimization. 99% of programmers don't have the knowledge to use such optimization techniques just to get their code to run slightly faster than the c# code. Use cases for for c/c++ are narrowing.
– user2074102
Aug 23 '16 at 16:11
...
How to downgrade from Internet Explorer 11 to Internet Explorer 10?
...
Tried this. now, when I'm trying to install IE10 it says "more recent version of IE is installed on your computer"
– Yaniv
Nov 18 '13 at 9:58
...
How to paste yanked text into the Vim command line
... registers. What you can do with registers is extraordinary, and once you know how to use them you cannot live without them.
Registers are basically storage locations for strings. Vim has many registers that work in different ways:
0 (yank register: when you use y in normal mode, without specifyi...