I wanted to use wild card search in DynamoDB with PHP.
I went through the AWS document but didn't find it. Help me please into this.
I have used filter expression like this:
'FilterExpression' => 'userId = :v1 and entryStamp between :v2 and :v3',
https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Condition.html
ComparisonOperator
CONTAINS :
Checks for a subsequence, or value in a set.
AttributeValueList can contain only one AttributeValue element of type
String, Number, or Binary (not a set type). If the target attribute of
the comparison is of type String, then the operator checks for a
substring match. If the target attribute of the comparison is of type
Binary, then the operator looks for a subsequence of the target that
matches the input. If the target attribute of the comparison is a set
("SS", "NS", or "BS"), then the operator evaluates to true if it finds
an exact match with any member of the set. CONTAINS is supported for
lists: When evaluating "a CONTAINS b", "a" can be a list; however, "b"
cannot be a set, a map, or a list.
'FilterExpression' => 'userId CONTAINS :v1'
Related
I am using data sources in Terraform to fetch a list of ids of my security groups as such:
data "aws_security_groups" "test" {
filter {
name = "group-name"
values = ["the-name"]
}
}
output "security_group_id" {
value = "The id is ${data.aws_security_groups.test.ids[*]}"
}
However, this is giving me the following error:
Error: Invalid template interpolation value
on main.tf line 11, in output "security_group_id":
11: value = "The id is ${data.aws_security_groups.test.ids[*]}"
|----------------
| data.aws_security_groups.test.ids is list of string with 1 element
Cannot include the given value in a string template: string required.
But if I use data.aws_security_groups.test.ids[0] instead it displays the ID.
Can someone help me to display the list of IDs?
First, I want to note that you don't necessarily need to combine this list with a string message at all if you don't want to, because Terraform will accept output values of any type:
output "security_group_ids" {
value = data.aws_security_groups.test.ids
}
If having them included as part of a bigger string is important for your underlying problem then you'll need to make a decision about how you want to present these multiple ids in your single string. There are various different ways you could do that, depending on what you intend to do with this information.
One relatively-straightforward answer would be to make the string include a JSON representation of the list using jsonencode, like this:
output "security_group_id_message" {
value = "The ids are ${jsonencode(data.aws_security_groups.test.ids)}"
}
If you want a more human-friendly presentation then you might prefer to use a multi-line string instead, in which case you can customize the output using string templates.
output "security_group_id_message" {
value = <<-EOT
The ids are:
%{ for id in data.aws_security_groups.test.ids ~}
- ${id}
%{ endfor ~}
EOT
}
Or, for an answer somewhere in between, you could use join to just concatenate the values together with a simple delimiter, like this:
output "security_group_id_message" {
value = "The ids are ${join(",", data.aws_security_groups.test.ids)}"
}
Note that I removed the [*] from your reference in all of these examples, since it isn't really doing anything here: data.aws_security_groups.test.ids is already an iterable collection, and so is compatible with all of the language features I used in the examples above.
IIRC the provider considers this ids attribute to be a set of strings rather than a list of strings, and so that [*] suffix could potentially be useful in other situations to force converting the set into a list if you need it to be typed that way, although if that is your intent then I'd suggest using one of the following instead so that it's clearer to a future reader what it does:
sort(data.aws_security_groups.test.ids) (if it being in lexical order is important to the behavior; Terraform uses lexical sorting by default anyway, but calling sort is a good prompt to a reader unfamiliar with Terraform to look up that function to see what the actual sort order is.)
tolist(data.aws_security_groups.test.ids) (functionally equivalent to sort above when it's a set of strings, but avoids the implication that the specific ordering is important, if all that matters is that it's a list regardless of the ordering)
I want search request on the List<Food> that I got. I have used a query method like this:
_foodList.where((food) => food.name == userInputValue).toList();
however, the search asked me to search with complete text and the right capitalization of the text.
how if I want to process a compilation of "dish", then all the names of foods that have the word "dish" will display in List?
Lower-case or upper-case all strings before comparison and use contains() instead of ==:
_foodList.where((food) => food.name.toLowerCase().contains(userInputValue.toLowerCase()).toList();
If values can be null you need to add additional checks.
I want to cast dictionary and log it.
dict:(enlist`code)!(enlist`B10005)
when I do
type value dict / 11h
but the key looks like ,code
when I do
type string value dict / 0h
I am not sure why.
I want to concatenate with strings and log it. So it will be something like:
"The constraint is ",string key dict
But it did not work. The constraint will be like each letter for each line. How I can cast the dictionary so I can concatenate and log it.
Have a look at http://code.kx.com/q/ref/dotq/#qs-plain-text for logging arbitrary kdb+ datatypes.
q)show dict:`key1`key2!`value1`value2
key1| value1
key2| value2
q).Q.s dict
"key1| value1\nkey2| value2\n"
There are several things are going on here.
dict has one key/value pair only but this fact doesn't affect how key and value behave: they return all keys and values. This is why type value dict is 11h which is a list of symbols. For exact same reason key dict is ,`code where comma means enlist: key dict is a list of symbols which (in your particular example) happens to have just one symbol `code.
string applied to a list of symbols converts every element of that list to a string and returns a list of strings
a string in q is a simple list of characters (see http://code.kx.com/wiki/Tutorials/Lists for more on simple and mixed lists)
when you join a simple list of characters "The constraint is " with a list of strings, i.e. a list of lists of characters a result cannot be represented as a simple list anymore and becomes a generic list. This is why q converts "The constraint is " (simple list) to ("T";"h";"e",...) (generic list) before joining and you q starts displaying each character on a separate line.
I hope you understand now what's happening. Depending on your needs you can fix your code like this:
"The constraint is ",first string key dict / displays the first key
"The constraint is ",", "sv string key dict / displays all keys separated by commas
Hope this helps.
if you are looking something for nice logging, something like this should help you(and is generic)
iterate through values, and convert to strings
s:{$[all 10h=type each x;","sv x;0h~t:type x;.z.s each x;10h~t;x;"," sv $[t<0;enlist#;(::)]string x]}/
string manipulation
fs:{((,)string[count x]," keys were passed")," " sv/:("Key:";"and the values for it were:"),'/:flip (string key#;value)#\:s each x}
examples
d:((,)`a)!(,)`a
d2:`a`b!("he";"lo")
d3:`a`b!((10 20);("he";"sss";"ssss"))
results and execution
fs each (d;d2;d3)
you can tailor obviously to your exact needs - this is not tested for complex dict values
I have got a list of different names. I have a script that prints out the names from the list.
req=urllib2.Request('http://some.api.com/')
req.add_header('AUTHORIZATION', 'Token token=hash')
response = urllib2.urlopen(req).read()
json_content = json.loads(response)
for name in json_content:
print name['name']
Output:
Thomas001
Thomas002
Alice001
Ben001
Thomas120
I need to find the max number that comes with the name Thomas. Is there a simple way to to apply regexp for all the elements that contain "Thomas" and then apply max(list) to them? The only way that I have came up with is to go through each element in the list, match regexp for Thomas, then strip the letters and put the remaining numbers to a new list, but this seems pretty bulky.
You don't need regular expressions, and you don't need sorting. As you said, max() is fine. To be safe in case the list contains names like "Thomasson123", you can use:
names = ((x['name'][:6], x['name'][6:]) for x in json_content)
max(int(b) for a, b in names if a == 'Thomas' and b.isdigit())
The first assignment creates a generator expression, so there will be only one pass over the sequence to find the maximum.
You don't need to go for regex. Just store the results in a list and then apply sorted function on that.
>>> l = ['Thomas001',
'homas002',
'Alice001',
'Ben001',
'Thomas120']
>>> [i for i in sorted(l) if i.startswith('Thomas')][-1]
'Thomas120'
I have the following set of data :
(Name=[Jane Doe]>[Jane Doe]),
(Job=[Temporary Employee]>[Full Time]),
(Address=[1 place]>[2 St.]),
(Title=[Account Manager]>[Account Manager])
I am trying to find out which name-value pairs have been modified. For example,
While Name value stayed the same "Jane Doe" to "Jane Doe", Job's value was changed from "temporary employee" to "full time", Address' value was changed from "1 place" to "2 St.". Finally, title value remained the same.
All the comparisons will be done for values in [..] > [..]. I will also need what was changed, name, job, title and address.
Any help will be appreciated. Thanks
EDIT : Not sure why this was down voted. It is still a regex question where one needs to extract name, from-value and to-value pairs. Comparison will be done afterwards.
You can only match the keys and values - regex will not compare them for you:
\(([^=]+)=\[([^]]+)\]>\[([^]]+)\]\)
demo