大约有 35,549 项符合查询结果（耗时：0.0469秒） [XML]
How to get the insert ID in JDBC?
...int affectedRows = statement.executeUpdate();
if (affectedRows == 0) {
throw new SQLException("Creating user failed, no rows affected.");
}
try (ResultSet generatedKeys = statement.getGeneratedKeys()) {
if (generatedKeys.next()) {
use...
psycopg2: insert multiple rows with one query
... located in another city.
I found out that using this method was about 10 times faster than executemany. In my case tup is a tuple containing about 2000 rows. It took about 10 seconds when using this method:
args_str = ','.join(cur.mogrify("(%s,%s,%s,%s,%s,%s,%s,%s,%s)", x) for x in tup)
cur.exe...
Java integer to byte array
I got an integer: 1695609641
13 Answers
13
...
What is the difference between a 'closure' and a 'lambda'?
...otherfunc(h):
def func(): return h
return func
print anotherfunc(10)()
This will print 10.
This, as you notice, has nothing to do with lambdas - they are two different (although related) concepts.
share
...
JavaScript module pattern with example [closed]
...larpattern = (function() {
// your module code goes here
var sum = 0 ;
return {
add:function() {
sum = sum + 1;
return sum;
},
reset:function() {
return sum = 0;
}
}
}());
alert(modularpattern.add()); //...
Could not reliably determine the server's fully qualified domain name
...
answered May 2 '11 at 10:48
noodlnoodl
16k22 gold badges5050 silver badges5454 bronze badges
...
How are zlib, gzip and zip related? What do they have in common and how are they different?
...
+500
Short form:
.zip is an archive format using, usually, the Deflate compression method. The .gz gzip format is for single files, also ...
count vs length vs size in a collection
...ifferent from the length in cases like vectors (or strings), there may be 10 characters in a string, but storage is reserved for 20. It also may refer to number of elements - check source/documentation.
Capacity() - used to specifically refer to allocated space in collection and not number of valid...
How to format strings using printf() to get equal length in the output?
...
You can specify width on string fields, e.g.
printf("%-20s", "initialization...");
and then whatever's printed with that field will be blank-padded to the width you indicate.
The - left-justifies your text in that field.
...
Why can I access TypeScript private members when I shouldn't be able to?
...
GuffaGuffa
619k9090 gold badges651651 silver badges926926 bronze badges
...