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How can you run a command in bash over until success
...swd || (( count++ >= 5 )); do echo "foo"; done (bash only, make sure to set count to 0 if that varaible exists) If you need this for plain sh, increment the counter in the body and use [ ]
– Justin Sane
Aug 5 '15 at 11:53
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Wi-Fi 是什么的缩写 - 程序人生、谈天论地 - 清泛IT论坛，有思想、有深度
...是 Level 0，阅读本文前建议先搜索并查看相关资料学习 Wi-Fi 的基本概念，本文将不涉及定义或技术上的解释。Wi-Fi 是 Wireless Fidelity 吗一天和客户闲聊，我随口问了一句，Wi-Fi 是什么的缩写？客户是个美国人，他愣了一下，说自...
How to view AndroidManifest.xml from APK file?
...PK... and select your apk. Then you can see the content of the AndroidManifset file.
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Medium-size Clojure sample application?
...er the same source tree.
Allows code written in a very small
subset of Clojure to be automatically translated to JavaScript.
The ClojureScript translator is a full Clojure app.
I'd also recomend checking out the Stewart Halloway's Port of Practical Common Lisp samples to Clojure if yo...
How to measure time taken by a function to execute
...ail is supposed to be built by world-class engineers from Google.......
(Set your system clock to one year ago and go to Gmail so we can all have a good laugh. Perhaps someday we will have a Hall of Shame for JS Date.)
Google Spreadsheet's now() function also suffers from this problem.
The only ...
DBMS_OUTPUT.PUT_LINE not printing
...nd, have the ability to do so. In SQL*Plus, you'd need to use the command set serveroutput on [size N|unlimited]. So you'd do something like
SQL> set serveroutput on size 30000;
SQL> exec print_actor_quotes( <<some value>> );
In SQL Developer, you'd go to View | DBMS Output to...
Git undo local branch delete
...
You can use git reflog to find the SHA1 of the last commit of the branch. From that point, you can recreate a branch using
git branch branchName <sha1>
Edit: As @seagullJS says, the branch -D command tells you the sha1, so if you have...
A migration to add unique constraint to a combination of columns
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
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How do you join on the same table, twice, in mysql?
...ther join, something along these lines:
SELECT toD.dom_url AS ToURL,
fromD.dom_url AS FromUrl,
rvw.*
FROM reviews AS rvw
LEFT JOIN domain AS toD
ON toD.Dom_ID = rvw.rev_dom_for
LEFT JOIN domain AS fromD
ON fromD.Dom_ID = rvw.rev_dom_from
EDIT:
All you're doing is joining i...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
...be overwritten.
However, I could install bash in /usr/local/bin/bash, and setup my PATH to:
PATH="/usr/local/bin:/bin:/usr/bin:$HOME/bin"
Now, if I specify bash, I don't get the old cruddy one at /bin/bash, but the newer, shinier one at /usr/local/bin. Nice!
Except my shell scripts have that !#...