大约有 4,000 项符合查询结果（耗时：0.0222秒） [XML]
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...nished my check on INNODB from 10 checks I can tell that it's 26(2query) against 9.2(1 query) SELECT SQL_CALC_FOUND_ROWS tblA.*, tblB.id AS 'b_id', tblB.city AS 'b_city', tblC.id AS 'c_id', tblC.type AS 'c_type', tblD.id AS 'd_id', tblD.extype AS 'd_extype',...
How to center align the cells of a UICollectionView?
... Modified to determine origin.x for each item
var maxY: CGFloat = -1.0 // Modified to determine origin.y for each item
var rowSizes: [[CGFloat]] = [] // Tracks the starting and ending x-values for the first and last item in the row
var currentRow: Int = 0 // Tracks the curren...
Android list view inside a scroll view
...xml and then magic happens.
Below is a sample xml code :
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_paren...
how to draw directed graphs using networkx in python?
...'),
('B', 'H'), ('B', 'G'), ('B', 'F'), ('C', 'G')])
val_map = {'A': 1.0,
'D': 0.5714285714285714,
'H': 0.0}
values = [val_map.get(node, 0.25) for node in G.nodes()]
# Specify the edges you want here
red_edges = [('A', 'C'), ('E', 'C')]
edge_colours = ['black' if not ed...
What does the constant 0.0039215689 represent?
...
I would've expected to see it written as a = b * (1.0f / 255); compilers still do constant folding, don't they?
– Ilmari Karonen
Mar 24 '14 at 22:51
9
...
Is it possible to specify a starting number for an ordered list?
...pecification. The ol element also had an optional start attribute in XHTML 1.0's transitional DTD but not in XHTML 1.0's strict DTD (search for the string ATTLIST ol and check the attribute list). So in spite of what some of the older comments say, the start attribute was not deprecated; rather it w...
Detect Browser Language in PHP
...atch)) {
if (!isset($match[2])) {
$match[2] = '1.0';
} else {
$match[2] = (string) floatval($match[2]);
}
if (!isset($languages[$match[2]])) {
$languages[$match[2]] = array();
}
$l...
WiX tricks and tips
...ing) correct product and location.
Example Config.wxi
<?xml version="1.0" encoding="utf-8"?>
<Include>
<!-- Upgrade code should not change unless you want to install
a new product and have the old product remain installed,
that is, both products existing as separate ins...
List Git aliases
...to yield lines starting with alias in case some configurations somehow contains keyword alias: git config --list | grep -E '^alias'
– MasterMind
Feb 2 '18 at 10:19
add a comme...
Why does Java's hashCode() in String use 31 as a multiplier?
...
It's not a great hash algorithm, but it's good enough and better than the 1.0 code (and very much better than the 1.0 spec!).
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