10-06-2011
It builds an associative array indexed by the concatenation of the first field, a special character (the current value of SUBSEP, default \034) and the second field, then it checks if such key is present (while reading the next file and constructing the key dynamically ...). Of course, I could be missing something ...
To the OP: does this code produce the expected output?
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File1 row is same as column 2 in file 2.
Also file 2 will either start with A, B or C.
And 3rd column in file 2 is always F2.
When column 2 of file 2 matches file1 column, print all those rows into a separate file.
Here is an example.
file 1:
100
103
104
108
file 2:
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Hi,
I know how to use awk to search some expressions like five consecutive numbers, , this is easy.
However, how do I make awk print the pattern that is been matched?
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First, thanks for the help in previous posts... couldn't have gotten where I am now without it!
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Hello Guyz
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Hi experts , im new to Unix,AWK ,and im just not able to get this right.
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I want to read from file 1 and pattern match in file two and print field two from the next line.
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user1
user2
user3
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Im using the command below , but thats not the output that i want. it only prints the odd and even numbers.
awk '{if(NR%2){print $0 > "1"}else{print $0 > "2"}}'
Im hoping for something like this
file1:
Text hi this is just a test
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AWK command to get file content until 3 occurrence of pattern match,
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JMS_BODY_FIELD:JMSText = <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<person>Romi</person>
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</custOptIn>
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In the awk, thanks you @RavinderSingh13, for the help in below, hopefully it is close as I am trying to update the value in $12 of the tab-delimeted file2 with the matching value in $1 of the space delimeted file1. I have added comments for each line as well. Thank you :).
awk
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LEARN ABOUT X11R4
xkbkeyaction
XkbKeyAction(3) XKB FUNCTIONS XkbKeyAction(3)
NAME
XkbKeyAction - Returns the key action
SYNOPSIS
XkbAction XkbKeyAction ( xkb, keycode, idx )
XkbDescPtr xkb;
KeyCode keycode;
int idx;
ARGUMENTS
- xkb Xkb description of interest
- keycode
keycode of interest
- idx index for group and shift level
DESCRIPTION
A key action defines the effect key presses and releases have on the internal state of the server. For example, the expected key action
associated with pressing the Shift key is to set the Shift modifier. There is zero or one key action associated with each keysym bound to
each key.
Just as the entire list of key symbols for the keyboard mapping is held in the syms field of the client map, the entire list of key actions
for the keyboard mapping is held in the acts array of the server map. The total size of acts is specified by size_acts, and the number of
entries is specified by num_acts.
The key_acts array, indexed by keycode, describes the actions associated with a key. The key_acts array has min_key_code unused entries at
the start to allow direct indexing using a keycode. If a key_acts entry is zero, it means the key does not have any actions associated with
it. If an entry is not zero, the entry represents an index into the acts field of the server map, much as the offset field of a
KeySymMapRec structure is an index into the syms field of the client map.
The reason the acts field is a linear list of XkbActions is to reduce the memory consumption associated with a keymap. Because Xkb allows
individual keys to have multiple shift levels and a different number of groups per key, a single two-dimensional array of KeySyms would
potentially be very large and sparse. Instead, Xkb provides a small two-dimensional array of XkbActions for each key. To store all of these
individual arrays, Xkb concatenates each array together in the acts field of the server map.
The key action structures consist only of fields of type char or unsigned char. This is done to optimize data transfer when the server
sends bytes over the wire. If the fields are anything but bytes, the server has to sift through all of the actions and swap any nonbyte
fields. Because they consist of nothing but bytes, it can just copy them out.
XkbKeyAction returns the key action indexed by idx in the two-dimensional array of key actions associated with the key corresponding to
keycode.idx may be computed from the group and shift level of interest as follows:
idx = group_index * key_width + shift_level
STRUCTURES
The KeySymMapRec structure is defined as follows:
#define XkbNumKbdGroups 4
#define XkbMaxKbdGroup (XkbNumKbdGroups-1)
typedef struct { /* map to keysyms for a single keycode
*/
unsigned char kt_index[XkbNumKbdGroups]; /* key type index for
each group */
unsigned char group_info; /* # of groups and out of range group
handling */
unsigned char width; /* max # of shift levels for key */
unsigned short offset; /* index to keysym table in syms array
*/
} XkbSymMapRec, *XkbSymMapPtr;
X Version 11 libX11 1.2.1 XkbKeyAction(3)