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  • Most efficient way to search the last x lines of a file in python

    - by Harley
    I have a file and I don't know how big it's going to be (it could be quite large, but the size will vary greatly). I want to search the last 10 lines or so to see if any of them match a string. I need to do this as quickly and efficiently as possible and was wondering if there's anything better than: s = "foo" last_bit = fileObj.readlines()[-10:] for line in last_bit: if line == s: print "FOUND"

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  • PHP echo if post equals, help

    - by user342391
    I am trying to echo the action for my form if a post equals 'paypal' This is what I have: <?php if $_POST['method'] == 'paypal' echo 'action="paypal/process.php"' else echo 'action="moneybookers/process.php" '?> Do i need to print the variable before I do this? what am I doing wrong? I get this error: Parse error: syntax error, unexpected T_VARIABLE, expecting '(' in /var/www/account/credits/credit_amount.php on line 27

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  • mod_perl memory

    - by Pavel Georgiev
    Hi, I have a perl script running in mod_perl that needs to write a large amount of data to the client, possibly over a long period. The behavior that I observe is that once I print and flush something, the buffer memory is not reclaimed even though I rflush (I know this cant be reclaimed back by the OS). Is that how mod_perl operates and is there a way that I can force it to periodically free the buffer memory, so that I can use that for new buffers instead of taking more from the OS?

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  • cannot delete from doubly linked list using visual studios in C

    - by Jesus Sanchez
    hello I am currently doing an assignment that is supposed to read in a file, use the information, and then print out another file. all using doubly linked list. Currently i am trying to just read in the file into a doubly linked list, print it out onto the screen and a file, and finally delete the list and close the program. The program works fine as long as I don't call the dlist_distroy function which is supposed to delete the string. as soon as I do it the program starts running and then a window pops up saying "Windows has triggered a breakpoint in tempfilter.exe. This may be due to a corruption of the heap, which indicates a bug in tempfilter.exe or any of the DLLs it has loaded. This may also be due to the user pressing F12 while tempfilter.exe has focus. The output window may have more diagnostic information." I have revised the destroy and remove functions and cant understand the problem. my program is the following main.c #include <stdlib.h> #include <stdio.h> #include <string.h> #include "dlinklist.h" #include "DlistElmt.h" #include "Dlist.h" #include "dlistdata.h" /**************************************************************************************************/ int main ( int argc, char *argv[] ) { FILE *ifp, *ofp; int hour, min; Dlist *list; DlistElmt *current=NULL, *element; float temp; list = (Dlist *)malloc(sizeof(list)); element = (DlistElmt *)malloc(sizeof(element)); if ( argc != 3 ) /* argc should be 3 for correct execution */ { /* We print argv[0] assuming it is the program name */ /* TODO: This is wrong, it should be: usage: %s inputfile outputfile */ printf( "usage: %s filename", argv[0] ); } else { // We assume argv[1] is a filename to open ifp = fopen( argv[1], "r" ); if (ifp == 0 ){ printf("Could not open file\n"); } else{ ofp = fopen(argv[2], "w"); dlist_init(list);//, (destroy)(hour, min, temp)); while (fscanf(ifp, "%d:%d %f ", &hour, &min, &temp) == 3) { current=list->tail; if(dlist_size(list)==0){ dlist_ins_prev(list, current, hour, min, temp); } else{ dlist_ins_next(list, current, hour, min, temp); } } current = list->head; while(current != NULL){ if(current==list->head){ current=current->next; } else if((current->temp > (current->prev->temp +5)) || (current->temp < (current->prev->temp -5))){ dlist_remove(list, current); current=current->next; } else current=current->next; } current = list->head; while(current != NULL){ printf("%d:%d %2.1lf\n" ,current->time, current->time2, current->temp ); fprintf(ofp, "%d:%d %2.1lf\n", current->time, current->time2, current->temp ); current = current->next; } //dlist_destroy(list); //} fclose(ifp); fclose(ofp); } } getchar(); } dlistdata.c #include <stdlib.h> #include <stdio.h> #include <string.h> #include "dlinklist.h" #include "DlistElmt.h" #include "dlistdata.h" /**************************************************************************************************/ void dlist_init(Dlist *list){ list->size = 0; list->head = NULL; list->tail = NULL; return; } void dlist_destroy(Dlist *list){ while (dlist_size(list) > 0){ dlist_remove(list, list->head); } memset(list, 0, sizeof(Dlist)); return; } int dlist_ins_next(Dlist *list, DlistElmt *element, const int time, const int time2, const float temp){ DlistElmt *new_element; if (element == NULL && dlist_size(list) != 0) return -1; if ((new_element = (DlistElmt *)malloc(sizeof(new_element))) == NULL) return -1; new_element->time = (int )time; new_element->time2 = (int )time2; new_element->temp = (float )temp; if (dlist_size(list) == 0) { list->head = new_element; list->head->prev = NULL; list->head->next = NULL; list->tail = new_element; } else { new_element->next = element->next; new_element->prev = element; if(element->next == NULL) list->tail = new_element; else element->next->prev = new_element; element->next = new_element; } list->size++; return 0; } int dlist_ins_prev(Dlist *list, DlistElmt *element, const int time, const int time2, const float temp){ DlistElmt *new_element; if (element == NULL && dlist_size(list) != 0) return -1; if ((new_element = (DlistElmt *)malloc(sizeof(new_element))) == NULL) return -1; new_element->time = (int )time; new_element->time2 = (int )time2; new_element->temp = (float )temp; if (dlist_size(list) == 0){ list->head = new_element; list->head->prev = NULL; list->head->next=NULL; list->tail = new_element; } else{ new_element->next = element; new_element->prev = element->prev; if(element->prev ==NULL) list->head = new_element; else element->prev->next = new_element; element->prev = new_element; } list->size++; return 0; } int dlist_remove(Dlist *list, DlistElmt *element){//, int time, int time2, float temp){ if (element == NULL || dlist_size(list) == 0) return -1; if (element == list->head) { list->head = element->next; if (list->head == NULL) list->tail = NULL; else element->next->prev = NULL; } else{ element->prev->next = element->next; if (element->next = NULL) list->tail = element->prev; else element->next->prev = element->prev; } free(element); list->size--; return 0; }

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  • NHibernate - Stream large result sets?

    - by Dan Black
    Hi, I have to read in a large record set, process it, then write it out to a flat file. The large result set comes from a Stored Proc in SQL 2000. I currently have: var results = session.CreateSQLQuery("exec usp_SalesExtract").List(); I would like to be able to read the result set row by row, to reduce the memory foot print Thanks

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  • Sum of every N lines ; awk

    - by Sharat Chandra
    I have a file containing data in a single column .. I have to find the sum of every 4 lines and print the sum That is, I have to compute sum of values from 0-3rd line sum of line 4 to 7,sum of lines 8 to 11 and so on .....

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  • Python - Strange Behavior in re.sub

    - by Greg
    Here's the code I'm running: import re FIND_TERM = r'C:\\Program Files\\Microsoft SQL Server\\90\\DTS\\Binn\\DTExec\.exe' rfind_term = re.compile(FIND_TERM,re.I) REPLACE_TERM = 'C:\\Program Files\\Microsoft SQL Server\\100\\DTS\\Binn\\DTExec.exe' test = r'something C:\Program Files\Microsoft SQL Server\90\DTS\Binn\DTExec.exe something' print rfind_term.sub(REPLACE_TERM,test) And the result I get is: something C:\Program Files\Microsoft SQL Server@\DTS\Binn\DTExec.exe something Why is there an @ sign?

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  • Is there a way to have customised text instead of subject in Thunderbird's inbox list?

    - by peterp
    I am getting a lot of informational emails like "You've got a new message from ..." or "Notification of Donation Received", which often do not contain any information in the subject so that I have to open the email to see who sent the message or who donated which amount. I'd love to be able to make TB parse incoming emails and then display something interesting instead of the original subject, e.g. by defining a regular expression pattern. I know how to write regular expressions, but I do not know whether there is a way or an addon to modify the displayed text in the messages view. EDIT for clarification: I would like donation notifications from Paypal not to be displayed as original Notification of Donation Received but rather Paypal: John Doe has donated 50$

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  • python unittest howto

    - by zubin71
    I`d like to know how I could unit-test the following module. def download_distribution(url, tempdir): """ Method which downloads the distribution from PyPI """ print "Attempting to download from %s" % (url,) try: url_handler = urllib2.urlopen(url) distribution_contents = url_handler.read() url_handler.close() filename = get_file_name(url) file_handler = open(os.path.join(tempdir, filename), "w") file_handler.write(distribution_contents) file_handler.close() return True except ValueError, IOError: return False

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  • Using gdb with GMP variables

    - by Full Decent
    I am debugging some C code with gdb. My program has a variable of type mpz_t * retval. If I run the command print *retval I get the output $23 = {{ _mp_alloc = 6, _mp_size = 5, _mp_d = 0x1001008d0 }} Is there anything else I can do to get more information about the value stored in retval?

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  • Microsoft Visual C++ Runtime error when viewing JPEG files in Explorer

    - by Prince Kitts
    I am getting the following error each time I view JPG files in the windows explorer in Detailed view. Microsoft Visual C++ Runtime Library Assertion failed! Program: C:\Windows\Explorer.EXE File: multimedia\photos\metadatahandler\util.cpp Line: 4706 Expression: MinutesFraction < 1.0 For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts (Press Retry to debug the application - JIT must be enabled) These pictures were taken from a Nikon Coolpix AW110 camera. I think it is related to some EXIF data that is a date/time. I have tried reinstalling the Visual C++ 2013 and 2008 Run time library and restarting and the problem is still there. I uploaded a sample file here: https://anonfiles.com/file/e346e174708714a88d372e295265a03f (click topmost download button and not the ad below it or just save the opened image)

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  • How to create own XP printer driver

    - by Craig Johnston
    How would I create my own XP printer driver which will do the following: print to file (probably XPS format) put this file into a password protected ZIP file email the zip file to a configured email address Do existing printer driver already offer something like this anyway?

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  • How to judge the color of UILabel?

    - by william-hu
    UILabel *templabel = [self.wallBoxArray objectAtIndex:i]; for( int i = 0 ; i < [self.wallBoxArray count]; i++) { if(templabel.backgroundColor == [UIColor greenColor]) { NSLog(@"the color isn green"); } } There are many label's in my array. They all initialized with green color. But i judged that way ,why cant print " the color isn't green.Thank you.

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  • Drupal - displaying the title of the node within a block

    - by james6848
    Hi, I'm needing to dynamically display the title of a node within a block. I would have thought this would be simple, but all the code snippets I've tried don't seem to work (e.g. <?php print $node->title; ?> ) I've checked and tested that the PHP input format is on and working with other PHP bits and bobs, and everything seems OK. Any ideas?

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  • Nested generator functions in python

    - by Yuval A
    Consider a tuple v = (a,b,c) and a generator function generate(x) which receives an item from the tuple and generates several options for each item. What is the pythonic way of generating a set of all the possible combinations of the result of generate(x) on each item in the tuple? I could do this: v = (a,b,c) for d in generate(v[0]): for e in generate(v[1]): for f in generate(v[2]): print d,e,f but that's just ugly, plus I need a generic solution.

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  • Selecting Update queries alone from list of files using shell script

    - by Harish
    I am trying to get Update queries from a list of files using this script.I need to take lines containing "Update" alone and not "Updated" or "UpdateSQL"As we know all update queries contain set I am using that as well.But I need to remove cases like Updated and UpdatedSQL can anyone help? nawk -v file="$TEST" 'BEGIN{RS=";"} /[Uu][Pp][Dd][Aa][Tt][Ee] .*[sS][eE][tT]/{ gsub(/.*UPDATE/,"UPDATE");gsub(/.*Update/,"Update");gsub(/.*update/,"update");gsub(/\n+/,"");print file,"#",$0;} ' "$TEST" >> $OUT

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  • TCPDF remote image loading problem

    - by Leonard Austin
    Hi, Im trying to load a remote image into a pdf generated by tcpdf however I can't seem to get it to work? The rest of the pdf loads fine and it looks like to trying to retrieve the image however it just does print to the page? The code I am using is: $pdf->Image("http://media.domain.com/logo.jpg", 0, 0, 100, 150, 'JPEG', '', 'T', true, 72,'','','','','','',''); Any help on this would be a massive help, Thanks,

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