大约有 36,020 项符合查询结果（耗时：0.0197秒） [XML]
Why does Lua have no “continue” statement?
...t workaround is to use goto:
-- prints odd numbers in [|1,10|]
for i=1,10 do
if i % 2 == 0 then goto continue end
print(i)
::continue::
end
This is supported in LuaJIT since version 2.0.1
share
|
...
How to do what head, tail, more, less, sed do in Powershell? [closed]
On windows, using Powershell, what are the equivalent commands to linux's head , tail , more , less and sed ?
7 Answe...
Idiomatic way to wait for multiple callbacks in Node.js
Suppose you need to do some operations that depend on some temp file. Since
we're talking about Node here, those operations are obviously asynchronous.
What is the idiomatic way to wait for all operations to finish in order to
know when the temp file can be deleted?
...
Git: How to squash all commits on branch
... --force
Karlotcha Hoa adds in the comments:
For the reset, you can do
git reset $(git merge-base master $(git rev-parse --abbrev-ref HEAD))
[That] automatically uses the branch you are currently on.
And if you use that, you can also use an alias, as the command doesn't rely on the...
How do you run a command for each line of a file?
...
Blah 3 blabla 3..
Blah 4 blabla 4..
Blah 5 blabla 5..
Where commande is done once per line.
while read and variants.
As OP suggest cat file.txt | while read in; do chmod 755 "$in"; done will work, but there is 2 issues:
cat | is an useless fork, and
| while ... ;done will become a subshell whe...
Why do we need break after case statements?
Why doesn't the compiler automatically put break statements after each code block in the switch? Is it for historical reasons? When would you want multiple code blocks to execute?
...
How do I clone a generic list in C#?
...wish to clone the list. The items within the list are cloneable, but there doesn't seem to be an option to do list.Clone() .
...
Integer division: How do you produce a double?
...
double num = 5;
That avoids a cast. But you'll find that the cast conversions are well-defined. You don't have to guess, just check the JLS. int to double is a widening conversion. From §5.1.2:
Widening primitive c...
how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...
Try to do an UPDATE. If it doesn't modify any row that means it didn't exist, so do an insert. Obviously, you do this inside a transaction.
You can of course wrap this in a function if you don't want to put the extra code on the cl...
Parallelize Bash script with maximum number of processes
...
Depending on what you want to do xargs also can help (here: converting documents with pdf2ps):
cpus=$( ls -d /sys/devices/system/cpu/cpu[[:digit:]]* | wc -w )
find . -name \*.pdf | xargs --max-args=1 --max-procs=$cpus pdf2ps
From the docs:
--max-pro...