大约有 44,000 项符合查询结果（耗时：0.0457秒） [XML]
Run cron job only if it isn't already running
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Use flock. It's new. It's better.
Now you don't have to write the code yourself. Check out more reasons here: https://serverfault.com/a/82863
/usr/bin/flock -n /tmp/my.lockfile /usr/local/bin/my_script
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What is the maximum length of a table name in Oracle?
... stated above, in Oracle 12.2 and later, the maximum object name length is now 128 bytes.
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How to programmatically set maxLength in Android TextView?
...om 10 to 20, but as in code we add filter its remain set MaxLength 10 bcus now in array we have 10,20 two max lengths.
– Nikhil
Jun 29 at 14:35
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HTML code for an apostrophe
...he question says “apostrophe”, not “single quote”. If you already know you want an apostrophe, you might as well use the proper apostrophe ’ (’). It does no harm and will make some readers happier.
– Rory O'Kane
Jun 18 '12 at 17:34
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What's the point of JAXB 2's ObjectFactory classes?
...e), but when you come across a case where it's genuinely useful, you will know it. :-)
– Chris Jester-Young
Jun 5 '09 at 19:44
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Remove carriage return in Unix
...indly within a file (you may have them in the middle of strings for all I know). Using this test file with a CR at the end of the first line only:
$ cat infile
hello
goodbye
$ cat infile | od -c
0000000 h e l l o \r \n g o o d b y e \n
0000017
dos2unix is the way to go...
Chrome Development Tool: [VM] file from javascript
... in the stacktrace more than once, and you can't cache them, as you don't know which file is which in future stacktraces. This is fixed in Dev Tools, but not in webapps.
– Carl Smith
Jun 19 '14 at 13:45
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Error : BinderProxy@45d459c0 is not valid; is your activity running?
...is to work around the issue on older versions of Android for several years now, and haven't seen the crash since.
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Why can't I do ?
...answered the why and gave some ways around it. What I'll likely do (and I know I didn't provide much background) is create a local webserver to serve local images. That way the browser can display them.
– PeterV
Nov 4 '10 at 1:26
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How to set -source 1.7 in Android Studio and Gradle
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Java 7 support was added at build tools 19. You can now use features like the diamond operator, multi-catch, try-with-resources, strings in switches, etc. Add the following to your build.gradle.
android {
compileSdkVersion 19
buildToolsVersion "19.0.0"
defaultCon...