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What is “:-!!” in C code?
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1711
This is, in effect, a way to check whether the expression e can be evaluated to be 0, and if ...
How to return an array from JNI to Java?
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120
If you've examined the documentation and still have questions that should be part of your init...
Converting between datetime, Timestamp and datetime64
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12 Answers
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Change navbar color in Twitter Bootstrap
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How to detect the end of loading of UITableView
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21 Answers
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How to iterate object in JavaScript? [duplicate]
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143
You can do it with the below code. You first get the data array using dictionary.data and assi...
sed error: “invalid reference \1 on `s' command's RHS”
... variant 2:
-r -e "s/WARNING: (\([a-zA-Z0-9./\\ :-]\+\))/${warn}WARNING: \1${c_end}/g" \
(Note: untested)
Without the -r argument back-references (like \1) won't work.
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Confusion between factor levels and factor labels
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131
Very short : levels are the input, labels are the output in the factor() function. A factor ha...
What Does 'Then' Really Mean in CasperJS
...r = require('casper').create();
casper.start();
casper.then(function step1() {
this.echo('this is step one');
});
casper.then(function step2() {
this.echo('this is step two');
});
casper.thenOpen('http://google.com/', function step3() {
this.echo('this is step 3 (google.com is loaded...
How to atomically delete keys matching a pattern using Redis
...g like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance maters, keys
command should not use for regular operations in production, this
command is intended for debuggi...