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Using jQuery to test if an input has focus
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if anyone cares there is a much better way to capture focus now, $(foo).focus(...)
http://api.jquery.com/focus/
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List all base classes in a hierarchy of given class?
Given a class Foo (whether it is a new-style class or not), how do you generate all the base classes - anywhere in the inheritance hierarchy - it issubclass of?
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What is the significance of #pragma marks? Why do we need #pragma marks?
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My GCC compiler gave the warning, foo.h:52:0: warning: ignoring #pragma mark [-Wunknown-pragmas] #pragma mark -, which is not fatal. So gcc probably does not know about '-'.
– Kemin Zhou
May 4 at 20:34
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How do you debug a regex? [closed]
...n't format the output properly on Stack Overflow.)
$ perl -Mre=debug -e'"foobar"=~/(.)\1/'
Compiling REx "(.)\1"
Final program:
1: OPEN1 (3)
3: REG_ANY (4)
4: CLOSE1 (6)
6: REF1 (8)
8: END (0)
minlen 1
Matching REx "(.)\1" against "foobar"
0 <> <foobar> ...
How can I make console.log show the current state of an object?
...rse(JSON.stringify(o))
}
example usage: consoleLogWithObjectCopy('obj', {foo: 'bar'}, 1, /abc/, {a: 1})
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Why is sizeof considered an operator?
... possible if it's an operator rather than a function. For instance:
union foo {
int i;
char c[sizeof(int)];
};
Syntactically if it weren't an operator then it would have to be a preprocessor macro since functions can't take types as arguments. That would be a difficult macro to implement ...
How do you do a simple “chmod +x” from within python?
... created: Executable is only set for those that can read.
Usage:
path = 'foo.sh'
with open(path, 'w') as f: # umask in effect when file is created
f.write('#!/bin/sh\n')
f.write('echo "hello world"\n')
make_executable(path)
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How can I write to the console in PHP?
...pproach, echo as JSON:
<script>
console.log(<?= json_encode($foo); ?>);
</script>
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Set NOW() as Default Value for datetime datatype?
... you can use the DATETIME type with a dynamic default value:
CREATE TABLE foo (
creation_time DATETIME DEFAULT CURRENT_TIMESTAMP,
modification_time DATETIME ON UPDATE CURRENT_TIMESTAMP
)
Or even combine both rules:
modification_time DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CU...
Is there a way to do repetitive tasks at intervals?
...rtBeat() {
for range time.Tick(time.Second * 1) {
fmt.Println("Foo")
}
}
Playground
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