大约有 47,000 项符合查询结果（耗时：0.0775秒） [XML]
How can I find out if I have Xcode commandline tools installed?
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crujzocrujzo
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2
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Effective way to find any file's Encoding
... true).CurrentEncoding
– Benoit
Mar 10 '16 at 8:22
4
There is a fundamental error in the code; wh...
How to check if a value exists in a dictionary (python)
...ve timing:
>>> T(lambda : 'one' in d.itervalues()).repeat()
[0.28107285499572754, 0.29107213020324707, 0.27941107749938965]
>>> T(lambda : 'one' in d.values()).repeat()
[0.38303399085998535, 0.37257885932922363, 0.37096405029296875]
>>> T(lambda : 'one' in d.viewvalues())...
Why does Lua have no “continue” statement?
... Lua 5.2 the best 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
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ruby system command check exit code
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edited Sep 10 '13 at 20:36
answered Sep 10 '13 at 20:31
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DROP IF EXISTS VS DROP?
...all'Mike Sherrill 'Cat Recall'
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Multiple queries executed in java in single statement
...mysql> create table tbl_mq( i int not null auto_increment, name varchar(10), primary key (i) );
Query OK, 0 rows affected (0.16 sec)
mysql> delimiter //
mysql> create procedure multi_query()
-> begin
-> select count(*) as name_count from tbl_mq;
-> insert into tbl_mq...
Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
...ery iteration, and set the value of the loop variable(s) as you wish:
n = 10;
f = n;
while n > 1
n = n-1;
f = f*n;
end
disp(['n! = ' num2str(f)])
Btw, the for-each loop in Java (and possibly other languages) produces unspecified behavior when the data structure is modified during itera...
select * vs select column
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answered Jul 5 '10 at 14:50
Charles BretanaCharles Bretana
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Does R have an assert statement as in python?
...54
cbare
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answered Feb 10 '10 at 0:38
HarlanHarlan
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