c# - String.comparison performance (with trim) -

-

I need to do a lot of high-performance case-insensitive string comparison and I realized that way. ToLower () trim () is really stupid because all new strings are allocated

so I dug around a bit and looks better like this: 

  String Compare (txt1, The only problem here is that I want to ignore leading or trailing spaces, i.e. trim (), but if I use trim then i have the same problem with string allocation. I check every string I can see and can see that it starts with ("") or ends ("") and only then trim. Either it is or has indexed the index, pass the length and string for each string Compromise Override  ,  Public Static Ent (String Stra, int indexA, String strb, int indexB, int length, StringComparison comparison type)

But it seems that I get disturbed and use some integer It does not matter if I can not really make it bigger - if more and more statements for each combination of trailing and leading spaces on both strings .. then any ideas of an elegant solution?

Here's my current proposal: 

  public bool ISEqual (string A, string b) {returns (string.compare (a, b, string comperson. ) == 0); } Public Bull ITRMAqual (String A, String B) {If (Math.Ebus (A.line-B.Line)) 2) // If the length is greater than 2, then can not be equal {return False; } And if (IsEqual (A, B)) {back true; } Other {Returns (string compiler (A.Rim), B.Rim (), String Compression, Ordinal Ignor Sees) == 0); }}

Something like this should be done: 

  Public Static Ent TrimCompareIgnoreCase (String A, String B) {int indexA = 0; Int indexB = 0; While (index A & L; Aline & amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; lineback (while index b & lt; b lang & amp; amp; ; IV.ISHSiteSpace (B [Index B])) Index B ++; Int lenA = a.Length - indexA; Int lenB = B. Long-index B; while (lenA> 0 & amp; amp; Amp; amp; amp; amp; amp; amp; amp; amp ;;; all around; spacespace (an [indexA + lenA - 1])); lenA--; while (lenB> 0 & Amp; amp; amp; amp; amp; amp; amp; amp; amp; amp ;;; quarter (b [indexB + lenB - 1])) lenB--; if == 0 & amp; amp; amp; lenB == 0) if; (take == 0) returns 1; if (lenB == 0) Turn -1; Int result = String.Compare (A, index, B, indexb, meth.min (LNA, LNB, true); if (result == 0) {if (lenA & lt; lenB) results-- ; If (lenA> lenB) result ++;} return result;}

example: 

  string a = "asdf"; string b = "ASDF \ t"; console; light line (trim comport ignor case (A, B));

Output: 

  0

You need a profile against a simple trim and comparing it with some real data Not to see whether you are going to use it, there is no difference in fact to it.


Comments

Post a Comment

Popular posts from this blog

c# - How to capture HTTP packet with SharpPcap -

-
I would like to capture all incoming HTTP packets on my machine. To do this, I am using SharpPcap which is a WinPcap The cover is. SharpPcap works very well, but it captures TCP packets and what it wants to do for me is a very low level. Does anyone know how can I easily get full HTTP requests / reactions from all these TCP packets? Thanks SharpPcap is already able to capture the packet in the same way That's what the virus does (just in the code instead of the GUI). And you can either either parse them directly or you can put them in the drive in the common .pcap file format. The steps to parse the capture are: Open a connection at any time Loop a while Or start capturing using an event callback Parsing the raw packet for the type you want If you are reading .PPP dump files In addition to calling you an offline capture reader is almost the same, there is no need to select an interface, and you can set the majority There is no need to do the modes. All st...
Read more

php - Multiple Select with Explode: only returns the word "Array" -

-
By using Wordpress I have created a multiple selection box so that users can select categories to exclude. When the page is initially loaded, I see my predefined default option. However, when I select a new value and I save ... I only see the word "Array" and have not chosen anything else? & lt; Class = "amultiple" id = "& lt; php echo $ value ['id'] ;? gt;" name = "& gt; php echo $ value ['id'] ;; gt; []" Multiple = "multiple" size = "8" & gt; & Lt ;? Php global option; Foreign currency ($ value as value $) {if (get_settings ($ value ['id']) === FALSE {$$ value ['id'] = $ value ['std']; } And {$$ value ['id'] = get_settings ($ value ['id']); }} $ Ranges = & amp; Amp; Categories ('type = post & orderbiz = name & amp; hide_empty = 1'); If ($ ranges) {$ ex_cat = implode (',', $ tt_cat_exclude); Forex Currency ($ range a...
Read more

php - jQuery AJAX Post not working -

-
I do not understand why this script does not work. It has something to do within AJAX PostScript / Function. Right now, when I submit my form, it runs php code on the same page. What it should do, send the values ​​of the form for Project_Azax.fp, then there will be a refund of success on the page which is correct or false. $ (document) .ready (function () {$ ('div # didIt'). Hide (); $ ('form [name = adminForm]'). Submit (function () ($ {'.post' ('/ project_ajax.php', {action: $ ('[name = action]') Val (), pId: $ ('[name = pId]'). Val (), name ('[Name = name]'. Val (), url: $ ('[url = url]'). Val (), summary: ('[summary = summary]'). Val ()}, Function (data) {if (data.success) {$ ('div # didIt') .Sliddown ('slow');} and {warning ('unsuccessful SA!');}}, 'Jason'); return false ;});}); What is the code for project_ajax.php below ... if ($ _ POST ['action'] == ...
Read more