How can I check if an anonymous object that was created as such:
var myObj = {
prop1: 'no',
prop2: function () { return false; }
}
does indeed have a prop2 defined?
prop2 will always be defined as a function, but for some objects it is not required and will not be defined.
I tried what was suggested here: http://stackoverflow.com/questions/595766/how-to-determine-if-native-javascript-object-has-a-property-method but I don't think it works for anonymous objects .
Hi, I was writing a script to check if a number is Armstrong or not. This is my Code
echo "Enter Number"
read num
sum=0
item=$num
while [ $item -ne 0 ]
do
rem='expr $item % 10'
cube='expr $rem \* $rem \* $rem'
sum='expr $sum + $cube'
item='expr $item / 10'
done
if [ $sum -eq $num ]
then
echo "$num is an Amstrong Number"
else
echo "$num is not an Amstrong Number"
fi
After I run this script,
$ ./arm.sh
I always get this error
./arm.sh: line 5: [: too many arguments
./arm.sh: line 12: [: too many arguments
I am on cygwin.
How do I check if the user accepted a file download in javascript. Example: if the site pops up a download link, and the web browser asks the user to download the file, how do I determine on that page if the user accepted the download or not?
I want to log web site visits' IP, datetime, client and refferer data to access database but I'm planning to log every days log data in separate tables in example logs for 06.06.2010 will be logged in 2010_06_06 named table. When date is changed I'll create a table named 2010_06_07. But the problem is if this table is already created.
Any suggestions how to check if table exists in Access?
I am attempting to wipe and repopulate test data on SQL CE. I am getting an error due to FK constraints existing. Typically in Sql2005 I would
ALTER TABLE [tablename] CHECK/NOCHECK CONSTRAINT ALL to enable/disable all constraints. From what I could find in my searching, it seems that this might not be supported in CE. Is that true? If so, is there an alternative?
I install a sphinx search engine a couple months ago, as time pass, I don't remember that sphinx version I installed.
how to check my system sphinx version?
Is there a way in C# to check if an object is suspend? I have a TreeView that I need to know if it is still suspend.
myTreeView.BeginUpdate();
myTreeView.SuspendLayout();
// Do Stuff.
myTreeView.EndUpdate();
myTreeView.ResumeLayout();
Because i have this code in a recursive function I want to know if the TreeView is already been suspended.
I am creating a calendar in PHP and in the database have a date, let's say 6-10-10.
Sometimes I have repeating events, stored as weekly repeating, so if the date is 6-10-10, and I am repeating an event every two weeks from that day (including that day) what is the best way to find dates for every two weeks from 6-10-10?
For example, let's say the date is 7-8-10, how can I check to see that date meets my criteria?
Hello,
i have the follow code:
searchResults.SearchResultCollection.Add(
new SearchResult()
{
Header =
HttpUtility.HtmlDecode(
htmlDocument.DocumentNode
.SelectSingleNode(initialXPath + "h3")
.InnerText),
Link = HttpUtility.HtmlDecode(
htmlDocument.DocumentNode
.SelectSingleNode(initialXPath + "div/cite")
.InnerText)
}
);
Sometimes htmlDocument.DocumentNode.SelectSingleNode(....) returns null and my application crashed with NullReferenceException. Ofcourse i can write code which check returned value on null reference but then code will be overly verbose. What is graceful way to do that?
In < Modern C++ Design ,it introduces a way to check if a type fundamental type by introducing the so called type list. but what if I don't want to include so many loki code and just want a simple function to implement that? What is the simplest way to do that?
I'm using ADO .NET and MS SQL Server 2008.
I have a connection object to a server and a command:
SqlConnection conn = /* my connection*/;
string cmd = "some_sql_command";
I want to check if SQL Server can execute cmd. I don't want to execute cmd, but I want to know If SQL Server can execute it.
cmd can be any single SQL statement, it's not a procedure, transaction or multiple commands etc..
How do I check that a stored procedure exists using ADO.Net? Is there a specific way to do this (apart from executing SELECT OBJECT_ID() and checking the result)?
How do i check if a sheet exists in a excel using interop. I tried the following but it throws an COMException if not there.. Is there a better way of finding out than actually looking at the exception
Worksheet sheet = null;
Sheets worksheets = some;
sheet = (Worksheet)worksheets.get_Item("sheetName");
if(sheet!=null)
{
//do something
}
I need to update an old classic asp, and I have to call a function that normally returns an array, but under certain circumstances might return either Nothing or an undefined value.
How can I check that the result actually returns an array?
I find it curious that the most obvious way to create Date objects in Java has been deprecated and appears to have been "substituted" with not so obvious to use lenient calendar. So...
How do you check that a date given as a combination of day, month and year is a valid date? For instance a date 2008-02-31 (as in yyyy-mm-dd) would be invalid date.
I added datagridview to my win forms app and I also added one Check Box for marking rows.
ChekBox work as I accepted until user do sorting of DataGridView, After that previous selection of checkbox column get lost.
Is there a way to I make my datagridview remember which row is selected and after user do a sorting.
How in TFS do you check-in a file over the server version (no matter what).
I see the option to Compare, Resolve, and revert local to the latest server version.
Where is the copy over server version option?
I have a BigInteger value, let's say it is 282 and is inside the variable x. I now want to write a while loop that states:
while b2 isn't a perfect square:
a ? a + 1
b2 ? a*a - N
endwhile
How would I do such a thing using BigInteger?
EDIT: The purpose for this is so I can write this method. As the article states one must check if b2 is not square.
Hi, i need to check the type of a variable in javascript, i know 3 ways to do it:
instanceof operator: if(a instanceof Function)
typeof operator: if(typeof a=="function"
toString method (jQuery uses this): Object.prototype.toString.call(a) == "[object Function]"
Which is the most secure way to do type checking beetween these solutions? and why? Please don't tell me that the last solution is better only because jQuery uses that.
Hi all,
I have a Java app that has an icon in the system tray.
How can I check if the tray (or tray icon) has current focus?
Tray and TrayIcon don't seem to have .isFocused() or similar.
Is this possible?
Thanks!