大约有 43,000 项符合查询结果（耗时：0.1183秒） [XML]
Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...-----------------------------+------------------------------------'
while read -r d t
do
printf '%-*s|' "$dw" "$d"
case $d in
unset) unset t ;;
space) t=' ' ;;
esac
[ $t ] 2>$o && t || f
[ "$t" ] && t || f
[ -n $t ]...
java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has
...w to use Servlets the right way.
See also:
What exactly does "Response already committed" mean? How to handle exceptions then?
Unrelated to your concrete problem, your JDBC code is leaking resources. Fix that as well. For hints, see also How often should Connection, Statement and ResultSet be cl...
Timeout on a function call
...tercept from the regular Python code.
This module doesn't play well with threads (but then, who does?)
Note that since we raise an exception when timeout happens, it may end up caught and ignored inside the function, for example of one such function:
def loop_forever():
while 1:
print('s...
How many database indexes is too many?
...ntenance whenever data is added to the table. On tables that are primarily read only, lots of indexes are a good thing. On tables that are highly dynamic, fewer is better.
My advice is to cover the common and obvious cases and then, as you encounter issues where you need more speed in getting data ...
Find unmerged Git branches?
I have a Git repository with many branches, some of them already merged and some not. Since the number of branches is quite large, how can I determine which branches have not yet been merged? I would like to avoid having to do an "octopus" merge and re-merging branches that have already been merged....
How do I use method overloading in Python?
...
+1 for making me read about the "common mistake to avoid" before I got caught
– mdup
Sep 10 '13 at 11:27
49
...
How do I interpret precision and scale of a number in a database?
...
Precision, Scale, and Length in the SQL Server 2000 documentation reads:
Precision is the number of digits in a number. Scale is the number of digits to the right of the decimal point in a number. For example, the number 123.45 has a precision of 5 and a scale of 2.
...
How to convert java.sql.timestamp to LocalDate (java8) java.time?
...present a point in time, but rather a time as seen on a wall clock. Please read their javadocs. "Conversion between them can be done independently of any particular zone" - not true, new Timestamp(0L).toLocalDateTime() returns "1970-01-01T03:00" for my Moscow timezone. The result may be different fo...
App Inventor 2 TaifunImage 拓展，图像高级处理功能，剪裁，压缩，翻转等 ...
...于基本图像处理的图像扩展。
所需权限：android.permission.READ_EXTERNAL_STORAGE、android.permission.WRITE_EXTERNAL_STORAGE
属性
返回是否隐藏警告。
设置是否隐藏警告。
方法
调整ASD(应用特定目...
Difference between MEAN.js and MEAN.io
...) stopped his collaboration with this company and started Mean.js. You can read more about the reasons here.
Now... main (or little) differences you can see right now are:
SCAFFOLDING AND BOILERPLATE GENERATION
Mean.io uses a custom cli tool named 'mean'
Mean.js uses Yeoman Generators
MODULA...