Parsing A Expression String?
Jun 28, 2010
im doing a simple calculatro and was happy with the way i done things .. a ew member variables and a properties:
Private MVAR_Number1 As Decimal
Private MVAR_Number2 As Decimal
Private MVAR_Operator As Char[code].....
he want to add this:
Dim Operators() As Char = ("+", "-", "*", "/")
Dim OpPos as Decimal
OpPos = Expr.IndexOfAny(Operators)[code].....
Just drives me mad how complex this is all getting for something so simple, fell like giving it all up .
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Jun 12, 2012
I am using Flee to build a formula builder. It works great but the only problem I'm facing is that Flee doesn't understand Generic Methods I guess. I have a function called IIf declared in the expression context I'm using. [code]How can I work around this. I mean cannot , in sense, write all possible overloads of the function of all .net primitive types. What approach should I take.
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Mar 5, 2009
I would like to be able to parse vb.net code files, so I can examine the collection of Subs, Functions (and their contents, including comments), private variables, etc. I can be open the actual source code files. So for example, if I have:
[Code]....
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Mar 16, 2011
I'm creating a vb.net winforms application that will take in user given strings, parse them, and print out labels with variable information. The given string will be used in all the labels, but the variable part of the string will change with each label.
My question is: is it better to parse the strings one time, then store those values in arrays, or to parse the string each time a label is printed? Which will perform better? Which is better practice? What is the proper way to test something like this?
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Sep 15, 2006
get generic regular expression for my html file ....????? My html is....
[Code]...
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Oct 14, 2010
Excel returns a reference of the form
=Sheet1!R14C1R22C71junk
("junk" won't normally be there, but I want to be sure that there's no extraneous text.)I would like to 'split' this into a VB array, where
a(0)="Sheet1"
a(1)="14"
a(2)="1"
[code]....
I'm sure it can be done easily with a regular expression, but I just can't get the hang of it.
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Feb 5, 2010
I must convert string data from a CNC that is arithmetic expression to a number that I can use in a VB application that I wrote. The following is what I get out of the cnc. [18722*65536+19377]/67108864. I need to evaluate this expression in my VB ap. The format of the string is not always the same as what I have illustrated.
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Jun 23, 2011
I need a regular expression that can validate that a string is an alphanumeric comma delimited string.
Examples:
123, 4A67, GGG, 767 would be valid.
12333, 78787&*, GH778 would be invalid
fghkjhfdg8797< would be invalid
This is what I have so far, but isn't quite right: ^(?=.*[a-zA-Z0-9][,]).*$
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Apr 30, 2009
What is the simplest way to return the second part of an email address? eg: yx = somefunction(y); how do I get x to retur
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Jan 13, 2009
Have been struggling with parsing XML as there seems so many options. My XML string is formatted as follows
<mysite>
<request>
<type>login</apiType
[code]......
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Jul 13, 2010
I have a very long string. I need to parse this string so I can get information out of it. I know what each segment starts with and ends with. The length of the information will vary. I don't know what the easiest way of parsing this string.
Example data will be
ST*997*232898~AK1*HC*8888*~NM1*2*TESTING........
So i will want to get everything from ST to AK1then AK1 to NM1 and so on and so on.
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May 28, 2009
I have a string array (strValues()) that holds a large quantity of character data. I need to parse out characters that follow "*PN" and end with "*". I then need to store this data in a datatable so that I can loop through it afterwards and pull out the unique records to be added to an existing dataset. I've been trying to use basic "IndexOf" to get started but it tells me "Overload resolution failed because no accessible 'IndexOf' accepts this number of arguments". Is there a way to accomplish what I'm trying to do?Sample data: MS50*CF3224205*PNineed/thisdata*SD07JAN10*ED21JAN10
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Apr 19, 2011
I have a string(text) which has some sigle line and multiline comments.
single line comments are shown by "--" and multiline by "/* */".
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Aug 18, 2009
I have a string of type 2009-08-18 12:00 AM to parse into a datetime object. How do I do so?
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Nov 15, 2009
After countless hours of searching I have been unable to get this code to work. If anyone can provide we with an alternative. I know the easiest way is to use the Split() function but im trying to do an alternative method by identifying the spaces within the string and splitting them up.
I tried the search function, but to no avail.
Attached is the code.
CODE:
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Oct 19, 2011
I'm trying to find a way to parse a string which looks like this:
1,394,7,0,0,0,0,0,,0,0,63,85,0,,0,0/2,595,59,8,0,0,0,0,0,,,0,0,,0,8,6,0/3,696,0,0,0,0,,,0,0,,84,0,0/#
So that it only reads the first two digits, then delete everything after that till it reads a "/", read the first two digits and delete everything up to the "/" again.This would result in this:
1,394
2,595
3,696
I don't know how to remove every character after the last of the first two digits up to the first / it reads, can anyone help me with that?How can I parse this code easily?
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Mar 9, 2011
I need to parse a string that consists of fields in quotes, separated by commas. Using Split would work fine, but sometimes one of the fields has a comma in it. ie. "My Company, Inc","USA","12.50","125000"I'm just looking to get the fields into elements in an array. Can someone suggest a way to handle the embedded commas that are sometimes present?
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Feb 8, 2012
I have unstructured string. From this I need to find the date.
Example: [expected inputs]
"01/21/2012: text will be here"
";01/21/2012: text will be here"
[code].....
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Aug 5, 2011
I have files that are one long line of text but are made up of individual segments. I have managed to parse the segments into a string array but now need to parse each segment into its individual fields, based upon a field structure defined by the first 2 characters of the segment.For example:
CA12345ABC999999XXPPPPPPPP55
CA segment (CA is first 2 characters of segment) has fields defined as:
Field Name,Start,Length
[code]....
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Apr 6, 2012
I've written a little library to include in other projects that does some string parsing. One of the items I'd like to access as a property of the class is a string array.I can't seem to get the syntax right though. Even though the little project will build - when I add the .dll to my other project and create a reference to it, it gives me an error - argument not specified for parameter
[Code]...
As a matter of fact, I thought in VS 2010, you didn't have to use the get, sets anymore, but I can't seem to find the right example for what I'm trying to do.
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May 20, 2010
I am having a string in CSV format.http:[code].....I can add new values to it by some mechanism. Everything will be same except the new values will have numeric part = 0. Take example I have this exsiting CSV string
1 , abc.txt , 2 , def.doc , 3 , flyaway.txt
Now by some mechanism i added two more files Superman.txt and Spiderman.txt to the existing string. Now it became
1 , abc.txt , 2 , def.doc , 3 , flyaway.txt, 0, Superman.txt, 0 , Spiderman.txt
What i am doing here is that this csv string is paased into SP where its splitted and inserted to db. So for inserting I have to take the files with numeric part 0 only rest will be omiited .Which will be further then converted into CSV string.Array will look like this
str[0]="1"
str[1]="abc.txt"
str[2]="2"[code].....
So at last i want to say my input will be
1 , abc.txt , 2 , def.doc , 3 , flyaway.txt, 0, Superman.txt, 0 , Spiderman.txt
Desired Output:
0, Superman.txt, 0 , Spiderman.txt
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May 19, 2010
I have splitted comma separated values in an string array, something like this
[Code]...
note 0,2,4,6,8 [even positions] are having number and odd positions are having string. I am having a class Attachmodel
[Code]...
In the above i want to set the values and bind it to the grid, using List
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Jul 14, 2010
I need to convert a string such as "01h45m" into a TimeSpan. I know I can split the string apart to get the numbers, just looking for something more elegant...
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Jul 27, 2011
I am reading from an IO.port and returning the data to a string. I need to parse this to data rows that each represent a data record which I will add to a datagridview.
The data basically looks like this. I have inserted <SOH>,<US>, etc. for readability.
[Code]...
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Jun 25, 2011
I am writing a tool that logs stats for a first person shooter game. The game writes its information (including who killed who with which weapon) to a log file, which I read every so many seconds and parse so that I can write that information to a database.I am now having trouble parsing the weapon out of that string of information.
Some additional information is required: a weapon in this game can contain attachments (such as a scope, a grenade launcher, etc). Weapons can have either 1 or 2 attachments. Some weapons however cannot have any attachments at all.
Each log file entry that describes a kill contains a code that describes the weapon that was used. This code is a concatenation of either 3 or 4 parts:
<weapon>_<attachment>_mp
<weapon>_<attachment1>_<attachment2>_mp
where <weapon> is a code that describes a weapon and <attachment> is another code describing the attachment.This should be easy to parse by just splitting along the underscore characters, but there's a few catches:
1. Some attachments are able to kill players as well. Specifically: grenade launchers, flame throwers and underbarrel shotguns. In this case, the attachment is listed before the weapon:
<attachment>_<weapon>_mp Note also that in this case there is always only 1 attachment.
2. The biggest catch: some weapon names have an underscore in them (some even have 3 underscores)! So simply splitting along the underscore won't work in all cases; if the weapon name contains an underscore I'm splitting the name of the weapon..This makes the list of possible combinations a lot longer. The ones I can think of (I think these are all):
[Code]...
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Apr 2, 2011
I'm able to retrieve the source code of a web page and store it in a string variable. I would like to cast that string variable into an HTMLDocument if possible, to make parsing its elements much easier.
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Jul 16, 2009
I've built a string using the Format method:
Format("[{0}{1} {3}:{4}]", var1.ToString, var2.ToString, var3.ToString, var4.ToString)
var1 to var4 are long type. Is there a way to easily extract the information back (other then the String.Split method) ?
Like: MagicMethod("[{0}{1} {3}:{4}]", formatedString, var1, var2, var3, var4)?
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Nov 23, 2009
I am using an API (WSUS) that will give me an XML fragment that I need to work with. Essentially, I need to go through the fragment element by element, identify what type of element it is, and then put that element into the datagridview. The goal is to have a column with a human readable interpretation of the element, plus that actual element itself in a hidden column for further processing. So, using the below XML, I want the DGV to have column that says "Begin Or Group" and a hidden column with "<lar:Or>".
I can get an xmltextreader to loop through the elements just fine, but I can't figure out a way to return just the current element in XML. I've tried ReadString, Value, ToString, and a bunch of other stuff but just cannot seem to figure it out.
Here's an example fragment:
<lar:And>
<lar:Or>
<bar:WindowsVersion Comparison="EqualTo" MajorVersion="5" MinorVersion="0" ServicePackMajor="4" ServicePackMinor="0" />
[code]....
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Dec 8, 2009
Is there any way to convert an HTML string to an HtmlElement for easy parsing? If not, what's the best way to proceed?
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Sep 7, 2010
i'm parsing a string into two values then using one string named month to get the column name and one string named value to assign the value.
[Code]....
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