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difference between #if defined(WIN32) and #ifdef(WIN32)
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If you use #ifdef syntax, remove the brackets.
The difference between the two is that #ifdef can only use a single condition,
while #if defined(NAME) can do compound conditionals.
For example in your case:
#if defined(WIN...
Javascript - sort array based on another array
...{
var found = false;
items = items.filter(function(item) {
if(!found && item[1] == key) {
result.push(item);
found = true;
return false;
} else
return true;
})
})
result.forEach(function(item) {
document.writel...
Best XML Parser for PHP [duplicate]
...fine, but I don't think it's a good solution. So imagine what will happen, if your API provider change xml document version from 1.0 to 1.1? Second think is what @Gordon pointed out. SimpleXML loads entire document to memory. It's good solution but certainly not best.
– Karol
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Python `if x is not None` or `if not x is None`?
I've always thought of the if not x is None version to be more clear, but Google's style guide and PEP-8 both use if x is not None . Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convent...
How to check if an object is a generator object in python?
In python, how do I check if an object is a generator object?
9 Answers
9
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How can I check if an element exists in the visible DOM?
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It seems some people are landing here, and simply want to know if an element exists (a little bit different to the original question).
That's as simple as using any of the browser's selecting method, and checking it for a truthy value (generally).
For example, if my element had an id o...
Print a file, skipping the first X lines, in Bash [duplicate]
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$ tail great-big-file.log
< Last 10 lines of great-big-file.log >
If you really need to SKIP a particular number of "first" lines, use
$ tail -n +<N+1> <filename>
< filename, excluding first N lines. >
That is, if you want to skip N lines, you start printing line N+1. E...
Check if at least two out of three booleans are true
... me this question: given three boolean variables, a, b, and c, return true if at least two out of the three are true.
63 An...
Bash array with spaces in elements
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I think the issue might be partly with how you're accessing the elements. If I do a simple for elem in $FILES, I experience the same issue as you. However, if I access the array through its indices, like so, it works if I add the elements either numerically or with escapes:
for ((i = 0; i < ${#...
How to atomically delete keys matching a pattern using Redis
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Important note: this fails if you have more than a couple thousand keys matching the prefix.
– Nathan Osman
Aug 8 '14 at 16:42
93
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