大约有 47,000 项符合查询结果（耗时：0.0429秒） [XML]
MySQL IF NOT NULL, then display 1, else display 0
...
214
Instead of COALESCE(a.addressid,0) AS addressexists, use CASE:
CASE WHEN a.addressid IS NOT NU...
How to compare two strings in dot separated version format in Bash?
...ny way to compare such strings on bash, e.g.: 2.4.5 and 2.8 and 2.4.5.1 ?
29 Answers
...
Fast way to get image dimensions (not filesize)
...
195
The file command prints the dimensions for several image formats (e.g. PNG, GIF, JPEG; recent...
Convert a list of data frames into one data frame
...
148
Use bind_rows() from the dplyr package:
bind_rows(list_of_dataframes, .id = "column_label")
...
How to check if hex color is “too black”?
...rceived brightness.
Assuming a six character colour:
var c = c.substring(1); // strip #
var rgb = parseInt(c, 16); // convert rrggbb to decimal
var r = (rgb >> 16) & 0xff; // extract red
var g = (rgb >> 8) & 0xff; // extract green
var b = (rgb >> 0) & 0xff;...
Java - get pixel array from image
...
182
I was just playing around with this same subject, which is the fastest way to access the pixel...
How to remove gaps between subplots in matplotlib?
...
103
You can use gridspec to control the spacing between axes. There's more information here.
imp...
Numpy argsort - what is it doing?
...
146
According to the documentation
Returns the indices that would sort an array.
2 is the i...
JavaScript function similar to Python range()
... start = 0;
}
if (typeof step == 'undefined') {
step = 1;
}
if ((step > 0 && start >= stop) || (step < 0 && start <= stop)) {
return [];
}
var result = [];
for (var i = start; step > 0 ? i < stop : i > stop; i += ...
Two-dimensional array in Swift
...ments):
// 2 dimensional array of arrays of Ints set to 0. Arrays size is 10x5
var arr = Array(count: 3, repeatedValue: Array(count: 2, repeatedValue: 0))
// ...and for Swift 3+:
var arr = Array(repeating: Array(repeating: 0, count: 2), count: 3)
Change element at position
arr[0][1] = 18
OR
...