I tried to access the following value in an multidimensional array:
var temp = allSliderData[i]['slider_full'][j].path;
and it works fine, but the following not
var temp2 = allSliderData[i]['slider_thumbs'][j].285x255;
with the answer
"SyntaxError: identifier starts immediately after numeric literal"
I now tried escapings, array functions .. this message is good known in stackoverflow .. but still no luck.
Could anybody help out?
THANKS!!
Something like that won't work. You can't have a property named "2" there. What exactly do you want to do?
Related
Im trying to create a sql query dynamically with the following syntax:
Company.joins(:founder_persons)
.where("people.first_name like people[:first_name]", {people: {first_name: 'm%'}})
But running this on the rails console gives me TypeError: can't quote Array. Im guessing this is not how we use the where string? What's the right way to fix this error? Thanks.
One reason this error can occur is with a nested array used as SQL value.
Example:
Article.where(author: ['Jane', 'Bob'])
works, but:
Article.where(author: ['Jane', ['Bob']])
would give the error. A quick fix would be to run flatten on the array.
(Mentioning this since this page comes up when searching for the confusing error "Can't quote array".)
You could bind any value and then assign it, this way they should coincide in numbers, like:
Model.joins(:join_table)
.where('models.first_attribute LIKE ? AND models.second_attribute LIKE ?', value_for_first_attr, value_for_second_attr)
If using an array you should access each index you want to compare, or you can precede a splat *, and specify just one value, like:
Model.joins(:join_table)
.where('models.first_attribute LIKE ? AND models.second_attribute LIKE ?', *array_of_values)
Note although this way you're passing the "whole" array it should also coincide in size or numbers, otherwise it'd raise an ActiveRecord::PreparedStatementInvalid error depending if there are more or less elements than needed.
I have array like this:
{
toNumber = +79995840405;
type = 9;
}
{
toNumber = +79995840405;
type = 65;
}
{
toNumber = +79995840405;
type = 9;
}
{
toNumber = +79995840405;
type = 65;
}
How can I group items by toNumber & type? thanks
You have provided little detail, which makes it hard for people to help you; and haven't shown what you have tried yourself and explained where you got stuck, which is the SO approach - people here will help you, not do the work for you.
The above is why you are getting close votes.
That said let's see if we can point you in the right direction, but understand this is based on guesswork about what you have and your problem.
So it sounds like you have an array (NSArray) of dictionaries (NSDictionary) and wish to produce a dictionary of arrays. A straightforward iteration can be used for that:
Create an empty result dictionary (NSMutableDictionary)
Iterate over your array looking at each element (foreach)
Using the type value of your element as the key value of your result dictionary:
3.1. If there is no entry in your result dictionary for the key create a new array (NSMutableArray), add the element's toNumber value to it, and add the array to your result dictionary.
3.2 Otherwise simply add to toNumber value to the existing array at the key entry of your result dictionary.
That's it, each bullet is a line or two of code.
If you get stuck as a new question, providing details, showing your code, and explaining what you problem is. Someone will undoubtedly help you from there.
HTH
Am trying to find whether one field is sub string of another field by using INDEXOF(f1,f2) > -1 where f1,f2 are both char arrays. But am getting error message as "Scalars can be only used with projections".
Is this error message because of, lack of support for two variables comparison in INDEXOF or something else? Can some one help with this?
Thanks in advance.
If someone would be so kind as to help me get the highlighted line in to a variable, I would be very grateful.
I tried the following:
Dim Fromid = FBrequest.data(0)(3)("from")(2)
but it said the key was not present in the array.
Image is at imageshack.us
/img33/1491/wtfjsondeserialized.png
I would suggest doing a foreach to see what keys are present in your array. Example:
For Each entry As String In FBrequest.data(0)(3)
Console.WriteLine(entry)
Assuming that the "from" is the key that is missing. Additionally, I would also suggestion setting a breakpoint on this line and adding a watch statement. Inspect your FBRequest.data variable to see what the contents are.
Here is the single line from one of my functions to test if any objects in my array have a given property with a matching value
Return ((From tag In DataCache.Tags Where (tag.FldTag = strtagname) Select tag).Count = 1)
WHERE....
DataCache.Tags is an array of custom objects
strtagname = "brazil"
and brazil is definitely a tag name stored within one of the custom objects in the array.
However the function continually returns false.
Can someone confirm to me that the above should or should not work.
and if it wont work can someone tell me the best way to test if any of the objects in the array contain a property with a specific value.
I suppose in summary I am looking for the equivalent of a SQL EXISTS statement.
Many thanks in hope.
Your code is currently checking whether the count is exactly one.
The equivalent of EXISTS in LINQ is Any. You want something like:
Return DataCache.Tags.Any(Function(tag) tag.FldTag = strtagname)
(Miraculously it looks like that syntax may be about right... it looks like the docs examples...)
Many Thanks for the response.
Your code did not work. Then I realised that I was comparing to an array value so it would be case sensitive.
However glad I asked the question, as I found a better way than mine.
Many thanks again !