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What does 'var that = this;' mean in JavaScript?
...llustration:
var colours = ['red', 'green', 'blue'];
document.getElementById('element').addEventListener('click', function() {
// this is a reference to the element clicked on
var that = this;
colours.forEach(function() {
// this is undefined
// that is a reference to ...
Explain which gitignore rule is ignoring my file
...ge for more details.
Original answer follows:
git does not currently provide anything like this. But after seeing your question I did some googling and found that back in 2009 this feature was requested and partially implemented. After reading the thread, I realised it would not be too much work...
Best approach to converting Boolean object to string in java
...
* @param args the command line arguments
*/
public static void main(String[] args) {
Boolean b = true;
boolean z = false;
echo (b);
echo (z);
echo ("Value of b= " + b +"\nValue of z= " + z);
}
public static void echo(Object obj){
...
git merge: apply changes to code that moved to a different file
... but my colleague moved that code to a new file in his branch. So when I did git merge my_branch his_branch , git did not notice that the code in the new file was the same as the old, and so none of my changes are there.
...
What is the purpose of setting a key in data.table?
...two things:
reorders the rows of the data.table DT by the column(s) provided (a, b) by reference, always in increasing order.
marks those columns as key columns by setting an attribute called sorted to DT.
The reordering is both fast (due to data.table's internal radix sorting) and memory effic...
Difference between git stash pop and git stash apply
...de, allowing you to nicely resolve such conflicts… and neither will get rid of the stash, even though perhaps you’re expecting pop too. Since a lot of people expect stashes to just be a simple stack, this often leads to them popping the same stash accidentally later because they thought it was g...
java.net.URLEncoder.encode(String) is deprecated, what should I use instead?
...n byte order
UTF-16 Sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order mark
Example:
import java.net.URLEncoder;
String stringEncoded = URLEncoder.encode(
"This text must be encoded! aeiou áéíóú ñ, peace!", "UTF-8");
...
How to overcome TypeError: unhashable type: 'list'
...;
TypeError: unhashable type: 'list'
This happens because of the list inside a list which is a list which cannot be hashed. Which can be solved by converting the internal nested lists to a tuple,
>>> set([1, 2, 3, 4, (5, 6, 7), 8, 9])
set([1, 2, 3, 4, 8, 9, (5, 6, 7)])
Explicitly hashi...
Under what circumstances is an SqlConnection automatically enlisted in an ambient TransactionScope T
...stributed transaction, which can be confirmed by checking for a non-null GUID at Transaction.Current.TransactionInformation.DistributedIdentifier.
*Update: I read somewhere that this is fixed in SQL Server 2008, so that MSDTC is not used when the same connection string is used for both connections (...
Git submodule update
...try in the parent repo index), and you will need to add, commit and push said references from the main repo.
Next time you will clone that parent repo, it will populate the submodules to reflect those new SHA1 references.
The rest of this answer details the classic submodule feature (reference to a...