大约有 42,000 项符合查询结果（耗时：0.0939秒） [XML]
Using boolean values in C
... <stdbool.h>
Option 2
typedef enum { false, true } bool;
Option 3
typedef int bool;
enum { false, true };
Option 4
typedef int bool;
#define true 1
#define false 0
Explanation
Option 1 will work only if you use C99 and it's the "standard way" to do it. Choose this if possible.
Opt...
jQuery: checking if the value of a field is null (empty)
...
31
The value of a field can not be null, it's always a string value. this isn't entirely true. I've got a select containing no options. When I...
grepping using the “|” alternative operator
...
136
You need to escape the |. The following should do the job.
grep "gene\|exon" AT5G60410.gff
...
Remove duplicate rows in MySQL
...
A really easy way to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop all the duplicate rows. As an added benefit...
Enabling HTTPS on express.js
...
In express.js (since version 3) you should use that syntax:
var fs = require('fs');
var http = require('http');
var https = require('https');
var privateKey = fs.readFileSync('sslcert/server.key', 'utf8');
var certificate = fs.readFileSync('sslcert/ser...
Node.js: Difference between req.query[] and req.params
...|
edited Mar 24 '17 at 16:33
answered Jan 19 '13 at 19:37
J...
in entity framework code first, how to use KeyAttribute on multiple columns
...
SlaumaSlauma
164k5555 gold badges377377 silver badges404404 bronze badges
1
...
Difference between $state.transitionTo() and $state.go() in Angular ui-router
...
answered Jan 14 '14 at 3:53
Michelle TilleyMichelle Tilley
146k3737 gold badges348348 silver badges300300 bronze badges
...
SQLAlchemy: What's the difference between flush() and commit()?
...e same state as
# Foo('A') was above.
print 3, s2.query(Foo).all()
s2.rollback() # Foo('B') has not been committed, and rolling
# back the session's transaction removes it
# from the session....
How to remove all click event handlers using jQuery?
...
31
Since jQuery 1.7, you should use on and off instead of bind and unbind
– Ralph Jansen
Jul 27 '12 at ...