I have a file called 'test.abcde.houses.csv' and I want to extract the substring 'abcde' which I will use in my next processor group to query the database.
Currently, I am using the updateAttribute Processor group to try to extract the substring.
This is the code I am using in the value section.
var userPattern = java.util.regex.Pattern.compile('(.+?)\.[0-9]{8}-[0-9]{7,9}\..+');
var userMatcher = userPattern.matcher(fileName);
var matchExists = userMatcher.matches();
var user;
var userRemove;
if (matchExists) {
user = userMatcher.group(1);
userRemove = user + ".";
}
else {
throw 'Unable to parse username from file metadata.';
}
Question:
Is this the right way to extract a substring from a flow file name in NIFI?
Am I using the right processor group?
Does this code work with Nifi?
You need to use NiFi Expression Language, a kind of NiFi's own scripting feature which provides the ability to reference attributes, compare them to other values, and manipulate their values. Please refer to this official documentation.
UpdateAttribute processor is used to update/derive new/delete attributes. So you need to use the Expression Language inside UpdateAttribute to manipulate attributes.
Example:
test.abcde.houses.csv - this is your filename and if you want to extract abcde string from filename then you can use getDelimitedField function (Expression Language string function) like below. If the expression did not evaluate, then user attribute will be having empty/null value.
Property: user (if already present then update/assign value, otherwise create new attribute)
Value: ${filename:getDelimitedField(2, '.')} (abcde is at second index/position in filename attribute value)
Expression Language has Boolean, Conditional, String Manipulation, etc. functions, so you can easily replicate your JS logic into UpdateAttribute to derive desired attribute value.
Related
I am trying to create a custom javascript variable in GTM that returns part of a javascript variable that already exists.
Variable that already exists: window.ShopifyAnalytics.meta.product.variants.0.name
returns this: "Bamboo Basic String - Schwarz - S"
However I want to code a custom javascript variable to just return the Schwarz part, is this possible? If so what is the code that I would need?
Please can someone let me know what code to put into GTM to create this variable?
TIA
If all names are pretty much the same you could use split to get that part of string and then remove whitespaces. It would look like this:
window.ShopifyAnalytics.meta.product.variants.0.name.split('-')[1].replace(/
/g,'');
If the already existing variable is always structured the same way you could do something like this:
let variable = window.ShopifyAnalytics.meta.product.variants.0.name.split('-')
Then by calling varaible[1] you get the 'Schwartz' part of the variable.
If you want a return value you can use a function like the following and call it wherever you want.
Simply make sure to pass the correct argument content
// Declaring a function getColor that returns the second element in the list,
// trimmed (without spaces before and after)
const getColor = (content) => {
return content.split('-')[1].trim();
}
const test = "Bamboo Basic String - Schwarz - S";
console.log(getColor(test));
//console.log(getColor(window.ShopifyAnalytics.meta.product.variants.0.name));
You could split the string on the hypens (-) like this:
const productName = window.ShopifyAnalytics.meta.product.variants.0.name;
const part = productName.split(' - ')[1];
Assuming you have a consistent format, and you always want the second part after that hyphen.
split will separate parts of a string into an array where it finds a match for the argument. The first index [0] will be the product name, the second [1] will be the part you're looking for.
This could cause issues if you have a product name with a - in it too though so use with care!
If it needs to be an anonymous function for GTM, you could try the following (though I'm not a GTM expert):
function () {
const productName = window.ShopifyAnalytics.meta.product.variants.0.name;
return productName.split(' - ')[1] || 'Unknown';
}
I have the following div (this was already given to me, I did not create it):
<div data-sudo-slider='{"slideCount":1, "moveCount":1, "customLink":"#slider-nav a", "continuous":true, "updateBefore":false, "effect":"sliceRevealDown", "auto":true, "speed":1500, "pause": 5000}'>
as far as my understanding goes (please correct me if I am wrong), we are saying here, that I want to assing the following values (such as slideCount, moveCount, customLink, etc...) to the object named data-sudo-slider.
What I am trying to do in my underlying JavaScript, is to retrieve the value of pause from this object. Here is what I am doing:
var sudoEl = jQuery('[data-sudo-slider]');
var pause = sudoEl.pause;
Even though it recognized the slider object, it did not retrieve the value for pause I have passed in (returned value is undefined.
How can I retrieve this value?
You can use data() like this:
The .data() method allows us to attach data of any type to DOM
elements in a way that is safe from circular references and therefore
from memory leaks. We can retrieve several distinct values for a
single element one at a time, or as a set:
$('[data-sudo-slider]').data('sudoSlider').pause;
why did you have to specify 'sudoSlider'?
You can also use sudo-slider.
It worked as the property name is derived as following:
The attribute name is converted to all lowercase letters.
The data- prefix is stripped from the attribute name.
Any hyphen characters are also removed from the attribute name.
The remaining characters are converted to CamelCase. The characters immediately following the hyphens removed in Step 3 become uppercase.
You can get this property by:
$(function () {
var pause = $('[data-sudo-slider]').data('sudoSlider').pause;
});
$('[data-sudo-slider]') is the div element, where data-sudo-slider is defined. .data('sudoSlider') is the data property value. data is working with - signs a littlebit different, you can read about it in jQuery data documentation.
.pause is the property of JSON object.
You should use .data() to fetch data-sudo-slider value.
Return the value at the named data store for the first element in the jQuery collection, as set by data(name, value) or by an HTML5 data-* attribute.
var sudoEl = jQuery('[data-sudo-slider]').data('sudo-slider');
alert(sudoEl.pause);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div data-sudo-slider='{"slideCount":1, "moveCount":1, "customLink":"#slider-nav a", "continuous":true, "updateBefore":false, "effect":"sliceRevealDown", "auto":true, "speed":1500, "pause": 5000}'>
To retrieve the correct element use
var element = $("div[data-sudo-slider]");
You can either get the data-sudo-slider attribute via
var sudoSlider = element.attr("data-sudo-slider");
In which case you will have to convert the string to JSON to access the pause property:
var pause = JSON.parse(sudoSlider).pause;
or better yet, use the .data() method
var sudoSlider = element.data("sudoSlider");
var pause = sudoSlider.pause;
doesn't work:
console.log(obj.html_template); // outputs "myfile.html"
var html = fs.readFileSync(JSON.stringify(obj.html_template)); // file not found.
works:
console.log(obj.html_template); // "myfile.html"
var html = fs.readFileSync("myfile.html"); // Works.
I'm going crazy.
> JSON.stringify('myfile.html')
""myfile.html""
Your code is looking for the file "myfile.html" (note the superfluous quotes) in the filesystem. It doesn't exist.
Just look for it without stringification:
var html = fs.readFileSync(obj.html_template);
When you call JSON.stringify, it will convert all the Strings to the JSON format Strings, with surrounding double quotes. Quoting ECMAScript 5.1 Specification for JSON.stringify,
If Type(value) is String, then return the result of calling the abstract operation Quote with argument value.
And the Quote operation, is defined here, which basically surrounds the string with " and takes care of special characters in the String.
So JSON.stringify converts, a string, for example, abcd.txt to "abcd.txt", like this
console.log(JSON.stringify("abcd.txt"));
// "abcd.txt"
which is not equal to abcd.txt.
console.log(JSON.stringify("abcd.txt") == "abcd.txt");
// false
but equal to "abcd.txt".
console.log(JSON.stringify("abcd.txt") == '"abcd.txt"');
// true
So, your program searches for a file named "abcd.txt" instead of abcd.txt. That is why it is not able to find the file and fails.
To fix this problem, just drop the JSON.stringify and pass the string directly, like this
var html = fs.readFileSync(obj.html_template);
why are you using JSON.stringify in the first place? you should be able to just do
var html = fs.readFileSync(obj.html_template);
I need to rewrite a querysting using javascript.
First I check to see if the variable is present, if it is I want to replace it with a new search term. If it is not present then I just add the new variable
I'm able to get it to work with simple terms like hat, ufc hat
whitespaces are %20, so ufc hat is really ufc%20hat
I run into problem with terms like make-up, hat -baseball, coffee & tea, etc..
What is the proper regex for this?
Below is my code, which doesn't work.
var url = String(document.location).split('?');
querystring = url[1];
if(querystring.match(/gbn_keywords=/)!=null)
querystring=querystring.replace(/gbn_keywords=[a-zA-Z0-9%20.]+/,"gbn_keywords="+term);
else
querystring=querystring+"&gbn_keywords="+term;
No Regex needed. To get the query arguments, take everything after ?. Then, split the string by & to return each argument. Split again by = to get the arg name (right of =) and the value (left of =). Iterate through each argument, a rebuild the URL with each argument, excluding the one you don't want. You shouldn't run into problems here because ?, &, and - must be escaped if they are to be used in arguments. You also said you want to add the argument if it doesn't exist, so just set a variable to true, while you are iterating through each argument, if you find the argument. If you didn't append it to the end of the query string that you rebuilt.
location objects already have perfectly good properties like pathname, hostname etc. that give you the separate parts of a URL. Use the .search property instead of trying to hack the URL as a string (? may not only appear in that one place).
It's then a case of splitting on the & character (and maybe ; too if you want to be nice, as per HTML4 B2.2) and checking each parameter against the one you're looking for. For the general case this requires proper URL-decoding, as g%62n_keywords=... is a valid way of spelling the same parameter. On the way out naturally you will need to encode again, to stop & going on to the next parameter (as well as to include other invalid characters).
Here's a couple of utility functions you can use to cope with query string manipulation more easily. They convert between the ?... string as seen in location.search or link.search and a lookup Object mapping parameter names to arrays of values (since form-url-encoded queries can have multiple instances of the same parameter).
function queryToLookup(query) {
var lookup= {};
var params= query.slice(1).split(/[&;]/);
for (var i= 0; i<params.length; i++) {
var ix= params[i].indexOf('=');
if (ix!==-1) {
var name= decodeURIComponent(params[i].slice(0, ix));
var value= decodeURIComponent(params[i].slice(ix+1));
if (!(name in lookup))
lookup[name]= [];
lookup[name].push(value);
}
}
return lookup;
}
function lookupToQuery(lookup) {
var params= [];
for (var name in lookup)
for (var i= 0; i<lookup[name].length; i++)
params.push(encodeURIComponent(name)+'='+encodeURIComponent(lookup[name][i]));
return params.length===0? '' : '?'+params.join('&');
}
This makes the usage as simple as:
var lookup= queryToLookup(location.search);
lookup['gbn_keywords']= ['coffee & tea'];
var query= lookupToQuery(lookup);
& character is used to seperate key and value pairs in the querystring. So that you can match all the characters except for & by re-writing your code as follows:
querystring=querystring.replace(/gbn_keywords=[^&]+/,"gbn_keywords="+term);
[^&]+ matches one or more characters up to & or end of string. But if there may situations where the querystring data may look like ...?gbn_keywords= (no value) then a slight modification is needed to the above line:
querystring=querystring.replace(/gbn_keywords=[^&]*/,"gbn_keywords="+term);
Just change + to * so that the regex will match 0 or more characters. I think this is better.
Why don't you run a split on url[1] and than replace the value of the gbn_keywords in that new array?
And if you use a JavaScript Framework, there might be a handy function that does all that. In Prototype there is the function toQueryParams().
I have returned object from signature device and when i make quick watch on it, it told me that its an array of long and when i pass it to web method in my code behind (vb.net) it gives me nothing.
i need some help..
note: i'm using an activeX to capture the signature from the device.
this is javascript code :
function OnSave() {
var sign = document.FORM1.SigPlus1.SignatureString;
PageMethods.Save(sign);
}
this is my webmethod:
<WebMethod()> _
Public Shared Function Save(ByVal obj As Object) As String
Dim obj1 As New PFSIGNATURELib.SigniShellSignature
obj1.SignatureMime = obj
obj1.SaveBitmapToFile(System.AppDomain.CurrentDomain.BaseDirectory() & "\sign1.bmp", 200, 200)
Return "\sign1.bmp"
End Function
I don't know much about ASP.Net, but it seems like the PageMethods.Save function can't handle an array of long. Another possibility is that the sign variable is null in the javascript code.
Try adding
alert(sign);
in the middle your Javascript function, or better yet, install firebug and do
console.log(sign);
instead. This way you'll make sure the sign var actually contains what you think it does.
If it indeed contains an array of numbers (javascript doesn't have a long type), maybe you need to convert it to something else before calling the PageMethods.Save function.
For example, this javascript snippet will convert sign into a space-separated string of numbers:
s = ""
for (i in sign) {
s += sign[i] + " ";
}
sign = s
If you manage to pass this string to your webmethod, you can use some string parsing to get back the original array.