大约有 47,000 项符合查询结果（耗时：0.0659秒） [XML]
Using boolean values in C
...
1081
From best to worse:
Option 1 (C99)
#include <stdbool.h>
Option 2
typedef enum { fal...
Random Gaussian Variables
...rand = new Random(); //reuse this if you are generating many
double u1 = 1.0-rand.NextDouble(); //uniform(0,1] random doubles
double u2 = 1.0-rand.NextDouble();
double randStdNormal = Math.Sqrt(-2.0 * Math.Log(u1)) *
Math.Sin(2.0 * Math.PI * u2); //random normal(0,1)
double randNormal =...
Remove leading and trailing spaces?
... |
edited Dec 28 '16 at 5:03
Greg Schmit
3,39822 gold badges1616 silver badges3232 bronze badges
answere...
MySQL ON vs USING?
...lid to just say film_id since that would make for an ambiguity:
ERROR 1052 (23000): Column 'film_id' in field list is ambiguous
As for select *, the joining column appears in the result set twice with ON while it appears only once with USING:
mysql> create table t(i int);insert t select 1...
Ruby on Rails form_for select field with class
...
Rimian
31.1k1010 gold badges102102 silver badges107107 bronze badges
answered Nov 2 '10 at 20:46
MBOMBO
...
Aligning text and image on UIButton with imageEdgeInsets and titleEdgeInsets
... already does so we simply need to adjust the spacing.
CGFloat spacing = 10; // the amount of spacing to appear between image and title
tabBtn.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, spacing);
tabBtn.titleEdgeInsets = UIEdgeInsetsMake(0, spacing, 0, 0);
I also turned this into a category for ...
How do I return rows with a specific value first?
...
answered Aug 9 '09 at 1:57
Rob FarleyRob Farley
14.4k44 gold badges4040 silver badges5454 bronze badges
...
npm: disable postinstall script for package
... Gergo ErdosiGergo Erdosi
34.6k1616 gold badges100100 silver badges9090 bronze badges
2
...
Cross-browser custom styling for file upload button [duplicate]
...
label.myLabel input[type="file"] {
position:absolute;
top: -1000px;
}
/***** Example custom styling *****/
.myLabel {
border: 2px solid #AAA;
border-radius: 4px;
padding: 2px 5px;
margin: 2px;
background: #DDD;
display: inline-block;
}
.myLabel:hove...
Finding child element of parent pure javascript
...ernatives to querySelector, like document.getElementsByClassName('parent')[0] if you so desire.
Edit: Now that I think about it, you could just use querySelectorAll to get decendents of parent having a class name of child1:
children = document.querySelectorAll('.parent .child1');
The differenc...