foo.txt
1 rs2887286 0 1145994 C T
1 rs1240743 0 1323299 C A
1 rs1695824 0 1355433 G T
1 rs3766180 0 1468016 G A
1 rs7519837 0 1500664 A G
1 rs2272908 0 1711339 A G
bar.txt
Code:
rs2887286 1145994 G A
rs1240743 1323299 G T
rs1695824 1355433 C A
rs6603791 1490804 G A
rs7519837 1500664 A G
rs2272908 1711339 A G
foobar.txt
Code:
1 rs2887286 0 1145994 C T 1145994 G A
1 rs1240743 0 1323299 C A 1323299 G T
1 rs1695824 0 1355433 G T 1355433 C A
1 rs6603791 0 1490804 G A
1 rs7519837 0 1500664 A G 1500664 A G
1 rs2272908 0 1711339 A G 1711339 A G
Would be nice to be able to do this with awk.
EDIT: Thank you for all the responses.
The other solutions seem to work only if the sort order of the foo.txt and bar.txt are equal. The files are NOT equal. One file has 400,000 lines (bar.txt) and the othr (foo.txt) has 11million lines.
My goal is to get the corresponding values for the rs### from foo.txt into a new output that has the bar.txt intact.
Thanks once again, my mistake for not explaining properly.
Last edited by genehunter; 10-11-2011 at 02:17 PM..
Reason: Changed the data to explain it better
I am trying to join/paste columns from two files for the rows with matching first field. Any help will be appreciated.
Files can not be sorted and may not have all rows in both files.
Thanks.
File1
aaa 111
bbb 222
ccc 333
File2
aaa sss mmmm
ccc kkkk llll
ddd xxx yyy
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Discussion started by: angshuman
8 Replies
LEARN ABOUT CENTOS
libtalloc_stealing
libtalloc_stealing(3) talloc libtalloc_stealing(3)NAME
libtalloc_stealing - Chapter 2: Stealing a context
Stealing a context
Talloc has the ability to change the parent of a talloc context to another one. This operation is commonly referred to as stealing and it
is one of the most important actions performed with talloc contexts.
Stealing a context is necessary if we want the pointer to outlive the context it is created on. This has many possible use cases, for
instance stealing a result of a database search to an in-memory cache context, changing the parent of a field of a generic structure to a
more specific one or vice-versa. The most common scenario, at least in Samba, is to steal output data from a function-specific context to
the output context given as an argument of that function.
struct foo {
char *a1;
char *a2;
char *a3;
};
struct bar {
char *wurst;
struct foo *foo;
};
struct foo *foo = talloc_zero(ctx, struct foo);
foo->a1 = talloc_strdup(foo, "a1");
foo->a2 = talloc_strdup(foo, "a2");
foo->a3 = talloc_strdup(foo, "a3");
struct bar *bar = talloc_zero(NULL, struct bar);
/* change parent of foo from ctx to bar */
bar->foo = talloc_steal(bar, foo);
/* or do the same but assign foo = NULL */
bar->foo = talloc_move(bar, &foo);
The talloc_move() function is similar to the talloc_steal() function but additionally sets the source pointer to NULL.
In general, the source pointer itself is not changed (it only replaces the parent in the meta data). But the common usage is that the
result is assigned to another variable, thus further accessing the pointer from the original variable should be avoided unless it is
necessary. In this case talloc_move() is the preferred way of stealing a context. Additionally sets the source pointer to NULL,
thus.protects the pointer from being accidentally freed and accessed using the old variable after its parent has been changed.
Version 2.0 Tue Jun 17 2014 libtalloc_stealing(3)