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  • How to convert from hex-encoded string to a "human readable" string?

    - by John Jensen
    I'm using the Net-SNMP bindings for python and I'm attempting to grab an ARP cache from a Brocade switch. Here's what my code looks like: #!/usr/bin/env python import netsnmp def get_arp(): oid = netsnmp.VarList(netsnmp.Varbind('ipNetToMediaPhysAddress')) res = netsnmp.snmpwalk(oid, Version=2, DestHost='10.0.1.243', Community='public') return res arp_table = get_arp() print arp_table The SNMP code itself is working fine. Output from snmpwalk looks like this: <snip> IP-MIB::ipNetToMediaPhysAddress.128.10.200.6.158 = STRING: 0:1b:ed:a3:ec:c1 IP-MIB::ipNetToMediaPhysAddress.129.10.200.6.162 = STRING: 0:1b:ed:a4:ac:c1 IP-MIB::ipNetToMediaPhysAddress.130.10.200.6.166 = STRING: 0:1b:ed:38:24:1 IP-MIB::ipNetToMediaPhysAddress.131.10.200.6.170 = STRING: 74:8e:f8:62:84:1 </snip> But my output from the python script yields a tuple of hex-encoded strings that looks like this: ('\x00$8C\x98\xc1', '\x00\x1b\xed;_A', '\x00\x1b\xed\xb4\x8f\x81', '\x00$86\x15\x81', '\x00$8C\x98\x81', '\x00\x1b\xed\x9f\xadA', ...etc) I've spent some time googling and came across the struct module and the .decode("hex") string method, but the .decode("hex") method doesn't seem to work: Python 2.7.3 (default, Apr 10 2013, 06:20:15) [GCC 4.6.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> hexstring = '\x00$8C\x98\xc1' >>> newstring = hexstring.decode("hex") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python2.7/encodings/hex_codec.py", line 42, in hex_decode output = binascii.a2b_hex(input) TypeError: Non-hexadecimal digit found >>> And the documentation for struct is a bit over my head.

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  • Create class instance in assembly from string name

    - by Arcadian
    I'm not sure if this is possible, and I'm quite new to using assemblies in C#.NET. What I would like to do is to create an instance of a class when supplied the string name of that class. Something like this: using MyAssembly; namespace MyNameSpace { Class MyClass { int MyValue1; int MyValue2; public MyClass(string myTypeName) { foreach(Type type in MyAssembly) { if((string)type == myTypeName) { //create a new instance of the type } } AssignInitialValues(//the type created above) } //Here I use an abstract type which the type above inherits from private void AssignInitialValues(AbstractType myClass) { this.value1 = myClass.value1; this.value2 = myClass.value2; } } } Obviously you cannot compare strings to types but it illustrates what I'm trying to do: create a type from a supplied string. Any thoughts? EDIT: After attempting: var myObject = (AbstractType) Activator.CreateInstance(null, myTypeName); AssignInitialValues(myObject); I get a number of errors: Inconsistent accessibility: parameter type 'MyAssembly.AbstractType' is less accessible than method 'MyNameSpace.MyClass.AssignInitialValues(MyAssembly.AstractType)' 'MyAssembly.AstractType' is inaccessible due to it's protection level The type or namespace name 'MyAssembly' could not be found (are you missing a using directive or an assembly reference?) The type or namespace name 'AbstractType' could not be found (are you missing a using directive or an assembly reference?) Not exactly sure why it can't find the assembly; I've added a reference to the assembly and I use a Using Directive for the namespace in the assembly. As for the protection level, it's calling classes (or rather the constructors of classes) which can only be public. Any clues on where the problem is? UPDATE: After looking through several articles on SO I came across this: http://stackoverflow.com/a/1632609/360627 Making the AbstractTypeclass public solved the issue of inconsistent accessibility. The new compiler error is this: Cannot convert type 'System.Runtime.Remoting.ObjectHandle' to 'MyAssembly.AbstractType' The line it references is this one: var myObject = (AbstractType) Activator.CreateInstance(null, myTypeName); Using .Unwrap() get's me past this error and I think it's the right way to do it (uncertain). However, when running the program I then get a TypeLoadException when this code is called. TypeLoadException: Could not load type ‘AbstractType’ from assembly ‘MyNameSpace'... Right away I can spot that the type its looking for is correct but the assembly it's looking in is wrong. Looking up the Activator.CreateInstance(String, String) method revealed that the null as the first argument means that the method will look in the executing assembly. This is contrary to the required behavior as in the original post. I've tried using MyAssembly as the first argument but this produces the error: 'MyAssembly' is a 'namespace' but is used like a 'variable' Any thoughts on how to fix this?

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  • String tokenizer for PHP

    - by Jack
    I have used the String Tokenizer in Java. I wish to know if there is similar functionality for PHP. I have a string and I want to extract individual words from it. eg. If the string is - Summer is doubtful #haiku #poetry #babel I want to know if it contains the hashtag #haiku.

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  • Groovy GDK equivalent of Apache Commons StringUtils.capitalize(str) or Perl's ucfirst(str)

    - by knorv
    Yes/no-question: Is there a Groovy GDK function to capitalize the first character of a string? I'm looking for a Groovy equivalent of Perl's ucfirst(..) or Apache Commons StringUtils.capitalize(str) (the latter capitalizes the first letter of all words in the input string). I'm currently coding this by hand using .. str = str[0].toUpperCase() + str[1 .. str.size() - 1] .. which works, but I assume there is a more Groovy way to do it. I'd imagine ucfirst(..) being a more common operation than say center(..) which is a standard method in the Groovy GDK (see http://groovy.codehaus.org/groovy-jdk/java/lang/String.html).

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  • how to send binary data within an xml string

    - by daemonkid
    I want to send a binary file to .net c# component in the following xml format <BinaryFileString fileType='pdf'> <!--binary file data string here--> </BinaryFileString> In the component that is called I will use the above xml string and convert the binary string recieved within the BinaryFileString tag, into a file as specified by the filetype='' attribute. The file type could be doc/pdf/xls/rtf I have the code in the calling application to get out the bytes from the file to be sent. How do I prepare it to be sent with xml tags wrapped around it? I want the application to send out a string to the component and not a byte stream. This is because there is no way I can decipher the file type [pdf/doc/xls] by just looking at the byte stream. Hence the xml string with the filetype attribute. Any ideas on this? method for extracting Bytes below FileStream fs = new FileStream(_filePath, FileMode.Open, FileAccess.Read); using (Stream input = fs) { byte[] buffer = new byte[8192]; int bytesRead; while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0) { } } return buffer; Thanks.

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  • Sort CMap Key by String Length

    - by Yan Cheng CHEOK
    Previously, I am using STL map to perform the mentioned task. struct ltstr { bool operator()(std::string s1, std::string s2) const { const int l1 = s1.length(); const int l2 = s2.length(); if (l1 == l2) { // In alphabetical order. return s1.compare(s2) < 0; } // From longest length to shortest length. return l1 > l2; } }; std::map<std::string, int, ltstr> m; How can I perform the same task using CMap? // How to make key sorted by string length? CMap<CString, LPCTSTR, int, int> m;

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  • LINQtoSQL: Query to return List<String>

    - by ctrlShiftBryan
    I have a LINQ query that returns some object like this... var query = from c in db.Customers where ... select c; Then I do this List<String> list = new List<String>(); foreach (ProgramLanguage c in query) { //GetUL returns a String list.Add(GetUL(c.Property,c.Property2)); } Is there a way to combine into something list this? var query = from c in db.Customers where ... select new { GetUL(c.Property,c.Property2) }).ToList<String>();

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  • JSONArray does not work when I am getting the JSON string from the server

    - by Taehoon A Kim
    I've looked up some answers but am not sure why mine is failing exactly... The code looks something like this HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); String json = EntityUtils.toString(httpEntity); //Convert to JsonArray JSONArray jsonArray = new JSONArray(json); Log.i(DEBUG_TAG, Integer.toString(jsonArray.length())); for (int i = 0; i < jsonArray.length(); i++) { JSONObject jsonObject = jsonArray.getJSONObject(i); Log.i(DEBUG_TAG, jsonObject.getString(KEY_ID)); // creating new HashMap HashMap<String, String> map = new HashMap<String, String>(); // adding each child node to HashMap key => value map.put(KEY_ID, jsonObject.getString(KEY_ID)); map.put(KEY_TITLE, jsonObject.getString(KEY_TITLE)); map.put(KEY_ARTIST, jsonObject.getString(KEY_ARTIST)); map.put(KEY_DURATION, jsonObject.getString(KEY_DURATION)); map.put(KEY_VOTECOUNT, jsonObject.getString(KEY_VOTECOUNT)); map.put(KEY_THUMB_URL, jsonObject.getString(KEY_THUMB_URL)); map.put(KEY_GENRE, jsonObject.getString(KEY_GENRE)); //Adding map to ArrayList if (Integer.parseInt(jsonObject.getString(KEY_VOTECOUNT)) == -1){ //If VoteCount is -1 then add to header headerList.add(map); }else { songsList.add(map); } } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } When I run logcat on String json, it seems to show correct info which is kind of like this... { "userdata": [ { "id": "8", "title": "Baby One More Time", "artist": "Britney Spears", "duration": "03:24:00", "votes": "0", "thumb_url": "http://api.androidhive.info/music/images/dido.png", "genre": null }, { "id": "2", "title": "As Long As You Love Me", "artist": "Justin Bieber", "duration": "05:26:00", "votes": "0", "thumb_url": "http://api.androidhive.info/music/images/enrique.png", "genre": "Rock" } ] } and the logcat on JSONArray jsonArray = new JSONArray(json); tells me that jsonArray.length() 10-31 22:57:28.433: W/CustomizedListView(26945): error! Invalid index 0, size is 0 Please let me know Thank you,

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  • vector<string> or vector<char *>?

    - by Aaron
    Question: What is the difference between: vector<string> and vector<char *>? How would I pass a value of data type: string to a function, that specifically accepts: const char *? For instance: vector<string> args(argv, argv + argc); vector<string>::iterator i; void foo (const char *); //*i I understand using vector<char *>: I'll have to copy the data, as well as the pointer Edit: Thanks for input!

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  • JPA and PostqreSQL: long string persistence

    - by emanemos
    Can anybody tell me how to persist long text using JPA (I use PostgreSQL)? Here's the way I defined a very long string in my class: @Lob private String body; However, this produces a field of type charactervarying(255) in the database. Furthermore, I've tried to use @Column annotation: @Column(columnDefinition="TEXT") private String body; But everything in vain. I would be gratefull for a helpfull comment on this problem.

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  • Hash Digest / Array Comparison in C#

    - by Erik Karulf
    Hi All, I'm writing an application that needs to verify HMAC-SHA256 checksums. The code I currently have looks something like this: static bool VerifyIntegrity(string secret, string checksum, string data) { // Verify HMAC-SHA256 Checksum byte[] key = System.Text.Encoding.UTF8.GetBytes(secret); byte[] value = System.Text.Encoding.UTF8.GetBytes(data); byte[] checksum_bytes = System.Text.Encoding.UTF8.GetBytes(checksum); using (var hmac = new HMACSHA256(key)) { byte[] expected_bytes = hmac.ComputeHash(value); return checksum_bytes.SequenceEqual(expected_bytes); } } I know that this is susceptible to timing attacks. Is there a message digest comparison function in the standard library? I realize I could write my own time hardened comparison method, but I have to believe that this is already implemented elsewhere.

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  • Searching LPSTR string

    - by David21
    I want to find some words after i get the whole file to char*. I know how to do it using the string class functions but i don't want to copy the data again to a string variable. is there any similar functions available to use for char* strings or should i still use string class?

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  • return first non repeating character in a string

    - by Amm Sokun
    I had to solve this question in which given a string, i had to return the first non repeating character present in the string. I solved it using hashtable and wrote a method which takes a constant reference to the string and returns the first non repeating character. However, when there is no non repeating character present in the string, i return -1 and in the main program i check as follows char c = firstNonRepeating( word ); if (static_cast<int> (c) == -1) cout<<"no non repeating character present\n"; else cout<<c<<endl; is that the correct way to return -1 when required character is not present?

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  • Python: Convert format string to regular expression

    - by miracle2k
    The users of my app can configure the layout of certain files via a format string. For example, the config value the user specifies might be: layout = '%(group)s/foo-%(locale)s/file.txt' I now need to find all such files that already exist. This seems easy enough using the glob module: glob_pattern = layout % {'group': '*', 'locale': '*'} glob.glob(glob_pattern) However, now comes the hard part: Given the list of glob results, I need to get all those filename-parts that matched a given placeholder, for example all the different "locale" values. I thought I would generate a regular expression for the format string that I could then match against the list of glob results (or then possibly skipping glob and doing all the matching myself). But I can't find a nice way to create the regex with both the proper group captures, and escaping the rest of the input. For example, this might give me a regex that matches the locales: regex = layout % {'group': '.*', 'locale': (.*)} But to be sure the regex is valid, I need to pass it through re.escape(), which then also escapes the regex syntax I have just inserted. Calling re.escape() first ruins the format string. I know there's fnmatch.translate(), which would even give me a regex - but not one that returns the proper groups. Is there a good way to do this, without a hack like replacing the placeholders with a regex-safe unique value etc.? Is there possibly some way (a third party library perhaps?) that allows dissecting a format string in a more flexible way, for example splitting the string at the placeholder locations?

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  • Other language string in SQL Server 2005

    - by balachandar
    I am trying you insert some string which is not in English (other language). when i fetch back they are not correct. They comes like "?????". But at the same time when I enter the string through the SQL Server UI (SSMS) to enter the string, it works OK. What could be the solution please?

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  • Unescpaing huge single-line string on Linux

    - by Lajos Nagy
    I ended up with a huge, single line string literal (don't ask me how) where everything is escaped (mostly), including new lines and double quotes. Problem is, I want the original string. The string is huge so I'm not even sure how to begin. Here's what I have: "This\n is \"nice\",\nain\'t it?" This is what I want: This is "nice", ain't it? Again, the problem is that other shell sensitive stuff is not escaped (like $, or !), and that the string is couple of megabytes.

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  • String codification to Twitter

    - by Miguel Ribeiro
    I'm developing a program that sends tweets. I have this piece of code: StringBuilder sb = new StringBuilder("Recomendo "); sb.append(lblName.getText()); sb.append(" no canal "+lblCanal.getText()); sb.append(" no dia "+date[2]+"/"+date[1]+"/"+date[0]); sb.append(" às "+time[0]+"h"+time[1]); byte[] defaultStrBytes = sb.toString().getBytes("ISO-8859-1"); String encodedString = new String(defaultStrBytes, "UTF-8"); But When I send it to tweet I get the "?" symbol or other strage characters because of the accents like "à" . I've also tried with only String encodedString = new String(sb.toString().getBytes(), "UTF-8"); //also tried with ISO-8859-1 but the problem remains...

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  • How to get everything in the string, but a particular pattern

    - by José Leal
    Yet another regexp question: I have a string as the following, "This is a string, and I have a priority !1" So I want to build a regexp that extracts my priority, which is this number 1 preceded by the "!". To extract it is very easy, "!([1-4])". But now I want to extract the text, leaving it out! How can I do that? DETAIL: The !1 can be anywhere in the string, so this is also perfectly fine: "This is a string, !1 and I have a priority" Thanks! UPDATE: I'm using scala

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  • Need some help accessing password string / Debugging

    - by Josh Lake
    I'm doing this code for the sole purpose in trying out how to get the password field masked. Any suggestions on where to go next? #include <iostream> #include <cmath> #include <stdio.h> #include <cstring> #include <conio.h> using namespace std; inline void keep_window_open() { char ch; cin>>ch; } int main() { cout << "Welcome to the Classified Network, DOD842349729961971\n"; cout << "Username: \n"; string admin = "gardinerca"; string root_password = "password1"; string full_name = "User Name"; string name; cin >> name; if (name == admin) { printf("Password: "); char password[10]; int i; for (i = 0; i <= 10; i++) { int c = getch(); if (c == '\n' || c == EOF) break; password[i] = c; printf("*"); } password[i] = '\0'; if (strcmp(password, root_password) == 0) { system("CLS"); cout << "Welcome " << full_name << " to the Classified Network\n"; cout << "Would you like to play a game? (Y or N)\n"; string play_game; cin >> play_game; if (play_game == "Y") { cout << "How many balls can you stick in your mouth?\n"; int balls; cin >> balls; string one; string two; one = "One Ball"; two = "Two Ball's"; if (balls == 1) cout << "You can honestly stick " << one << " in your mouth?"; } else { cout << "You have selected the No Option. Thats fine...we don't want to play with you either\n"; } } else { cout << "Invaild Password. Please contact system administrator.\n"; cin.clear(); system ("PAUSE"); } else { cout << "No Username found. Please contact system administrator.\n"; cin.clear(); system ("PAUSE"); } return 0; }

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