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Fastest check if row exists in PostgreSQL
...to table, but these inserts are always done in batches. So I want to check if a single row from the batch exists in the table because then I know they all were inserted.
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Can you organize imports for an entire project in eclipse with a keystroke?
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Select the project in the package explorer and press Ctrl + Shift + O (same keystroke as the single class version). Should work for packages, etc.
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Why is Python running my module when I import it, and how do I stop it?
...t declarations. Instead, they are real live statements which are executed. If they were not executed your module would be .. empty :-)
Anyway, the idiomatic approach is:
# stuff to run always here such as class/def
def main():
pass
if __name__ == "__main__":
# stuff only to run when not ca...
How to convert a Hibernate proxy to a real entity object
...using.
public static <T> T initializeAndUnproxy(T entity) {
if (entity == null) {
throw new
NullPointerException("Entity passed for initialization is null");
}
Hibernate.initialize(entity);
if (entity instanceof HibernateProxy) {
entity = (T) (...
Is there any boolean type in Oracle databases?
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1/0 is, if not ambiguous, at least less ambiguous.
– Adam Musch
Sep 16 '10 at 16:13
19
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Difference between if () { } and if () : endif;
Are there any differences between...
18 Answers
18
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Linux环境离线安装docker&docker-compose - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... firewalld.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
ExecStartPost=/usr/sbin/iptables -P FORWARD ACCEPT
Restart=always
TimeoutStartSec=0
LimitNOFILE=infinity
Limit...
How do I check if a type provides a parameterless constructor?
I'd like to check if a type that is known at runtime provides a parameterless constructor. The Type class did not yield anything promising, so I'm assuming I have to use reflection?
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How do I view cookies in Internet Explorer 11 using Developer Tools
... for ExtJS: Ext.Ajax.request({url: '/'});. Note that this should work even if the page does not exists (i.e. answer is 404). You might want to change the url so that you not break anything in your app ;-).
– Nux
Apr 28 '15 at 15:57
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Purpose of memory alignment
...e byte fetches rather than one efficient word fetch, but many language specifiers decided it would be easier just to outlaw them and force everything to be aligned.
There is much more information in this link that the OP discovered.
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