Dear All,
Please advice about this issue.
when i run this line in a script if && || && || && if i enter $x = test3 and $y = test1 the If condition apply while it should not
Best Regards (2 Replies)
I have been using the if statement in csh like this
if ( $opt1 == 1 ) then
.....
elseif ( $opt2 == 1 ) then
......
endif
Seems to work, but got
Badly placed ()'s.
When I used a space in the elseif, a space between the 'else' and the 'if' it worked (0 Replies)
Hi all,
This is my first post in this forum, can i request you to guide, where i am going wrong with the error below.
34: Syntax error: "fi" unexpected (expecting "then")
#!/bin/sh
argCount=0
mysql_path=$USER_INSTALL_DIR$
for i in $*; do
/A argCount+=1
done
if ;then
echo... (2 Replies)
Hi,
Ihave shifted this thread which i posted in linux forum to here if i am fault please correct me.
When i excute this below script i am getting the follwing error can any one please look into it for persual.
./sample_oracle_tradescope.sh: 25: showDEFAULTUsage: not found
... (6 Replies)
Hi,
My requirement is to check wheather some csv files have mandatory columns value as empty if empty log a error message or set a flag.
The problem here is that the column number varies for different CSVs hence we can not hardcode $1 or $3 like this in the awk command hence we are reading a... (5 Replies)
Experts:
LINE1 :This is line one The FIRST line of the file.
LINE2 :This is line two
LINE3 :This is line three with 8 fileds
LINE4 :This is line four
LINE5 :This is line five
LINE6 :This is line six with 8 fileds
I want to delete line 1, and then process the file and want to print lines... (2 Replies)
Hi
I am reading a book about Fortran 90 and I write the following code, to test my understanding of the first chapter. I have a problem with the last section of the code with deals with an IF, ELSEIF, and GOTO statements. Here is my Code
PROGRAM sim
! This code is used to solve two... (3 Replies)
Discussion started by: faizlo
3 Replies
LEARN ABOUT DEBIAN
dispatch_apply_f
dispatch_apply(3) BSD Library Functions Manual dispatch_apply(3)NAME
dispatch_apply -- schedule blocks for iterative execution
SYNOPSIS
#include <dispatch/dispatch.h>
void
dispatch_apply(size_t iterations, dispatch_queue_t queue, void (^block)(size_t));
void
dispatch_apply_f(size_t iterations, dispatch_queue_t queue, void *context, void (*function)(void *, size_t));
DESCRIPTION
The dispatch_apply() function provides data-level concurrency through a "for (;;)" loop like primitive:
dispatch_queue_t the_queue = dispatch_get_concurrent_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT);
size_t iterations = 10;
// 'idx' is zero indexed, just like:
// for (idx = 0; idx < iterations; idx++)
dispatch_apply(iterations, the_queue, ^(size_t idx) {
printf("%zu
", idx);
});
Like a "for (;;)" loop, the dispatch_apply() function is synchronous. If asynchronous behavior is desired, please wrap the call to
dispatch_apply() with a call to dispatch_async() against another queue.
Sometimes, when the block passed to dispatch_apply() is simple, the use of striding can tune performance. Calculating the optimal stride is
best left to experimentation. Start with a stride of one and work upwards until the desired performance is achieved (perhaps using a power
of two search):
#define STRIDE 3
dispatch_apply(count / STRIDE, queue, ^(size_t idx) {
size_t j = idx * STRIDE;
size_t j_stop = j + STRIDE;
do {
printf("%zu
", j++);
} while (j < j_stop);
});
size_t i;
for (i = count - (count % STRIDE); i < count; i++) {
printf("%zu
", i);
}
FUNDAMENTALS
Conceptually, dispatch_apply() is a convenient wrapper around dispatch_async() and a semaphore to wait for completion. In practice, the dis-
patch library optimizes this function.
The dispatch_apply() function is a wrapper around dispatch_apply_f().
SEE ALSO dispatch(3), dispatch_async(3), dispatch_queue_create(3), dispatch_semaphore_create(3)Darwin May 1, 2009 Darwin