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How to make “if not true condition”?
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edited Jan 11 '17 at 5:06
heemayl
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Printing all global variables/local variables?
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edited Jun 17 '14 at 12:24
Miles Rout
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How to append multiple values to a list in Python
...r any other thing that provides a sequence of values.
>>> lst = [1, 2]
>>> lst.append(3)
>>> lst.append(4)
>>> lst
[1, 2, 3, 4]
>>> lst.extend([5, 6, 7])
>>> lst.extend((8, 9, 10))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> ...
How to replace an item in an array with Javascript?
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var index = items.indexOf(3452);
if (index !== -1) {
items[index] = 1010;
}
Also it is recommend you not use the constructor method to initialize your arrays. Instead, use the literal syntax:
var items = [523, 3452, 334, 31, 5346];
You can also use the ~ operator ...
MongoDB SELECT COUNT GROUP BY
...ate:
db.contest.aggregate([
{"$group" : {_id:"$province", count:{$sum:1}}}
])
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How do I check if a variable exists in a list in BASH
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14 Answers
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Benefits of using the conditional ?: (ternary) operator
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17 Answers
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How to represent multiple conditions in a shell if statement?
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Classic technique (escape metacharacters):
if [ \( "$g" -eq 1 -a "$c" = "123" \) -o \( "$g" -eq 2 -a "$c" = "456" \) ]
then echo abc
else echo efg
fi
I've enclosed the references to $g in double quotes; that's good practice, in general. Strictly, the parentheses aren't needed becau...
How to check if all elements of a list matches a condition?
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414
The best answer here is to use all(), which is the builtin for this situation. We combine this ...
Find the index of a dict within a list, by matching the dict's value
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149
tom_index = next((index for (index, d) in enumerate(lst) if d["name"] == "Tom"), None)
# 1
I...