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jQuery map vs. each
...u can potentially waste a lot of memory.
For example:
var items = [1,2,3,4];
$.each(items, function() {
alert('this is ' + this);
});
var newItems = $.map(items, function(i) {
return i + 1;
});
// newItems is [2,3,4,5]
You can also use the map function to remove an item from an array. For...
Is SQL or even TSQL Turing Complete?
... |
edited Nov 11 '13 at 4:45
Qantas 94 Heavy
14.4k1616 gold badges6060 silver badges7777 bronze badges
...
Is it possible to for SQL Output clause to return a column not being inserted?
...ld1 INT, Field2 INT)
INSERT INTO Practice VALUES (1, 1), (2, 2), (3, 3), (4, 4)
MERGE INTO ReportOption r USING Practice p ON 1 = 0
WHEN NOT MATCHED THEN
INSERT (field1, field2)
VALUES (p.Field1, p.Field2)
OUTPUT p.PracticeId, inserted.ReportOptionId, inserted.Field1, inserted.Field2
...
CPU Privilege Rings: Why rings 1 and 2 aren't used?
...
114
As a hobbyist operating system writer, I found that because paging (a major part of the modern p...
Selecting data frame rows based on partial string match in a column
...), ]
mpg cyl disp hp drat wt qsec vs am gear carb
# Merc 240D 24.4 4 146.7 62 3.69 3.19 20.0 1 0 4 2
# Merc 230 22.8 4 140.8 95 3.92 3.15 22.9 1 0 4 2
# Merc 280 19.2 6 167.6 123 3.92 3.44 18.3 1 0 4 4
# Merc 280C 17.8 6 167.6 123 3.92 3.4...
Splitting on first occurrence
...
answered Aug 1 '11 at 19:48
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
667k127127 gold badges11911191 silver badges12501250 bronze badges
...
Reset keys of array elements in php?
...|
edited Jun 7 '18 at 19:04
Riz-waan
54322 silver badges1212 bronze badges
answered May 8 '12 at 5:09
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How to reorder data.table columns (without copying)
... a b c
# [1,] 1 3 0.2880365
# [2,] 2 2 0.7785115
# [3,] 3 1 0.3297416
setcolorder(x, c("c", "b", "a"))
x
# c b a
# [1,] 0.2880365 3 1
# [2,] 0.7785115 2 2
# [3,] 0.3297416 1 3
From ?setcolorder:
In data.table parlance, all set* functions change their input by reference. T...
Logging framework incompatibility
...ixing the 1.5.6 version of the jcl bridge with the 1.6.0 version of the slf4j-api; this won't work because of a few changes in 1.6.0. Use the same versions for both, i.e. 1.6.1 (the latest). I use the jcl-over-slf4j bridge all the time and it works fine.
...