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What is the meaning of the 'g' flag in regular expressions?
...y starts searching at the lastIndex.
// regular regex
const regex = /foo/;
// same regex with global flag
const regexG = /foo/g;
const str = " foo foo foo ";
const test = (r) => console.log(
r,
r.lastIndex,
r.test(str),
r.lastIndex
);
// Test the normal one...
Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...
There's no big advantage for those cases where an assertFoo exists that exactly matches your intent. In those cases they behave almost the same.
But when you come to checks that are somewhat more complex, then the advantage becomes more visible:
assertTrue(foo.contains("someValu...
Returning an array using C
...ry inside of the function (caller responsible for deallocating ret)
char *foo(int count) {
char *ret = malloc(count);
if(!ret)
return NULL;
for(int i = 0; i < count; ++i)
ret[i] = i;
return ret;
}
Call it like so:
int main() {
char *p = foo(10);
if(p...
Equivalent of String.format in jQuery
...ain the following error:
js> '{0} {0} {1} {2}'.format(3.14, 'a{2}bc', 'foo');
3.14 3.14 afoobc foo
Or, for the variants that count backwards from the end of the argument list:
js> '{0} {0} {1} {2}'.format(3.14, 'a{0}bc', 'foo');
3.14 3.14 a3.14bc foo
Here's a correct function. It's a pro...
Ruby Metaprogramming: dynamic instance variable names
...
h = { :foo => 'bar', :baz => 'qux' }
o = Struct.new(*h.keys).new(*h.values)
o.baz
=> "qux"
o.foo
=> "bar"
share
|
...
Save plot to image file instead of displaying it using Matplotlib
...fied by the extension:
from matplotlib import pyplot as plt
plt.savefig('foo.png')
plt.savefig('foo.pdf')
Will give a rasterized or vectorized output respectively, both which could be useful. In addition, you'll find that pylab leaves a generous, often undesirable, whitespace around the image. R...
Python name mangling
...wed by the class name will be prepended on the object:
>>> class Foo(object):
... __foobar = None
... _foobaz = None
... __fooquux__ = None
...
>>> [name for name in dir(Foo) if 'foo' in name]
['_Foo__foobar', '__fooquux__', '_foobaz']
Note that names will only get ...
Serialize an object to XML
...oString();
}
}
}
}
}
Usage:
Foo foo = new Foo{MyProperty="I have been serialized"};
string xml = foo.Serialize();
Just reference the namespace holding your extension method in the file you would like to use it in and it'll work (in my example it woul...
Copy table without copying data
copies the table foo and duplicates it as a new table called bar .
4 Answers
4
...
ReactJS state vs prop
...
React.createClass({
getInitialState: function() {
return { value: { foo: 'bar' } };
},
onClick: function() {
var value = this.state.value;
value.foo += 'bar'; // ANTI-PATTERN!
this.setState({ value: value });
},
render: function() {
return (
<div>
...