大约有 5,880 项符合查询结果（耗时：0.0450秒） [XML]
How to assign from a function which returns more than one value?
...it a lot more now than when I originally posted this answer since the data.table package uses the := operator mucho in a much handier way :-)
– Steve Lianoglou
Mar 12 '13 at 0:58
...
How to make connection to Postgres via Node.js
...
const pg_conctn = require('./pg_connection');
pg_conctn.getAll('your table')
.then(res => {
doResponseHandlingstuff();
})
.catch(e => {
doErrorHandlingStuff()
})
share
...
SQL Group By with an Order By
I have a table of tags and want to get the highest count tags from the list.
6 Answers
...
What are the most common naming conventions in C?
... or whatever: one or more
underscores at the beginning:
_refrobnicate_data_tables(), _destroy_cache().
share
|
improve this answer
|
follow
|
...
How to get the insert ID in JDBC?
...llstmt = null;
callstmt = con.prepareCall("INSERT INTO myIdentTable (col2) VALUES (?);SELECT @@IDENTITY");
callstmt.setString(1, "testInputBatch");
System.out.println("Batch statement successfully executed");
callstmt.execute();
int iUpd...
Network usage top/htop on Linux
...U usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "why is our ADSL link so slow?"...
share
|
...
What is a segmentation fault?
...n (process) memory in improper way (for instance trying to write to non-writable space). But the most common reason for it is the access to the part of the virtual address space that is not mapped to physical one at all.
And all of this with respect to virtual memory systems.
...
How do I get the name of a Ruby class?
...ke Module1::class_name. But if we only want class_name, use
result.class.table_name.singularize
share
|
improve this answer
|
follow
|
...
How to convert boost path type to string?
...
@MarcoAlka See the linked table boost.org/doc/libs/1_48_0/libs/filesystem/v3/doc/… and note the second line: class path canonize() Function removed - that means it was once in the library but no longer--the definition of deprecated.
...
Do you use NULL or 0 (zero) for pointers in C++?
...ger. In pre-standard code, NULL was/is sometimes defined to something unsuitable and therefore had/has to be avoided. That's less common these days.
If you have to name the null pointer, call it nullptr; that's what it's called in C++11. Then, nullptr will be a keyword.
That said, don't sweat the s...