Sponsored Content
Full Discussion: Explain a block of code:
Top Forums Programming Explain a block of code: Post 302356126 by eager2no on Thursday 24th of September 2009 02:43:17 PM
Old 09-24-2009
Explain a block of code:

Hi, I have this block in a code and I need to know it's meaning:

Code:
bool selectEvents = config.get("selectEvents",false);
  if (selectEvents) {
    ifstream in("events");
    while (in) {
      int run, evt;
      in >> run >> evt;
      if (in.eof()) break;
      selectedEvents.insert(make_pair(run,evt));
    }
    cout << "select " << selectedEvents.size() << " events" << endl;
  }

The statements I really need to know their meanings are the first one, which starts with bool and the one which starts with selectedEvents.insert().

I will appreciate any help,

eager
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

could someone explain this code

hey peeps could someone explain what this part of the code means: 'if echo $* | grep -q' $i '|| thanks tHe_nEw_GuY (2 Replies)
Discussion started by: the_new_guy
2 Replies

2. UNIX for Advanced & Expert Users

explain the code

Hi , Can anyone explains what does the below highlighted statements means: # Set environment variables . ${0%/*}/wrkenv.sh jobName_sh=${0##*/} jobName=${jobName_sh%.*} Thanks, Sri (1 Reply)
Discussion started by: srilaxmi
1 Replies

3. Shell Programming and Scripting

Can any one explain what this code will do

ccc_con,CCC_CON,0 Above is the input for this code #!/usr/bin/bash my_path=`dirname $0` T_table=$1 S_table=$2 P_table=$3 #Star new code while read ${my_path}/arch_table_list.txt { awk -F "," '{print $1}' ${my_path}/arch_table_list.txt ${S_table} awk -F "," '{print... (1 Reply)
Discussion started by: scorp_rahul23
1 Replies

4. Shell Programming and Scripting

can any one explain the meaning of the below code ?

while getopts :g:l:h: KEY $* do case $KEY in g) NAME=$OPTARG ;; l) LAB=$OPTARG ;; h) HD=$OPTARG ;; *) echo "Illegal option: $OPTARG" echo "$usage" exitStatus=1 exitGrace esac done (2 Replies)
Discussion started by: santosh1234
2 Replies

5. Shell Programming and Scripting

Please explain what code is doing between the two dotted lines

Can someone please explain the meaning of code between the two lines below. if ; then echo "./filter.sh <a flat file containing group and id>" fi ------------------------------------------------------------ >IDnotexist #account in request does not exist in NIS... (1 Reply)
Discussion started by: pinnacle
1 Replies

6. Shell Programming and Scripting

Explain SED code

Hi, Can anyone pls explain me the below SED code in detail. sed -e :a -e '$!N;s/\n//;ta' -e P -e D When this code is executed with a file(has 1lac records), it is taking very long time to process. So I wanted to modify this SED code with equivalant AWK code. Thanks, Sri (1 Reply)
Discussion started by: srilaxmi
1 Replies

7. Shell Programming and Scripting

Can someone explain the 2 lines of code?

I have something like in the script. Can anyone explain what does the sort command does and followed by the sed sort -r -k3.7,3 -k3.1,3 -k3.4,3 -t: $dir"abc_"$x"_parsed" | sed -e 's/\(\)\(\{3\}\)/\1,\2/2' -e 's/\/2,00/\/200/' The file abc_"$x"_parsed contains something like below ... (7 Replies)
Discussion started by: Muthuraj K
7 Replies

8. Shell Programming and Scripting

Please explain what this code is doing

Hi, Pls explain me what the below code is doing. specially meaning if -a while calling test function- case $1 in 1) beg_dt=01; end_dt=07 ;; 2) beg_dt=08; end_dt=14 ;; 3) beg_dt=15; end_dt=21 ;; 4) beg_dt=22; end_dt=28 ;; 5) beg_dt=29; end_dt=31 ;; esac test \( `date +%w` -eq $2 -a... (3 Replies)
Discussion started by: sendtoshailesh
3 Replies

9. Shell Programming and Scripting

Please explain what this Awk code is doing

Hi Guys, Please help me, I am new to programming and I don’t understand what some parts of this code are doing. I have comments on the parts I know, please help if my understanding of the code is not correct and also help with parts with questions. awk ' { gsub( ">",... (1 Reply)
Discussion started by: James_Owen
1 Replies

10. Shell Programming and Scripting

can you explain this sed code?

can anyone please explain this code? sed ':a;N;$!ba;s/]\n//g' file it replaces lines ending with "]" and concatenates with the next line so that line1] line2 becomes line1line2 i don't understand this part: :a;N;$!ba; I have noted that I can replace "a" with any letter: ... (1 Reply)
Discussion started by: locoroco
1 Replies
All times are GMT -4. The time now is 07:14 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy