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Why doesn't c++ have &&= or ||= for booleans?
... is then equivalent to static_cast<int>(b) & 2, which results in 0, which is then converted back into a bool. So it’s true that the existence of an operator &&= would improve type safety.
share
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How to specify Composer install path?
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140
It seems that you can define the vendor dir to be something else (plugins in your case):
{
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Gem::LoadError for mysql2 gem, but it's already in Gemfile
... with rails 4.1.5) try using this version of mysql2:
gem 'mysql2', '~> 0.3.18'
Apparently mysql2 isn't still compatible with newer version of rails because rails 4.2.4 is pretty new as the time of answering this question by me 8 September 2015 so use the above line in your Gem file and run:
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Is there a “null coalescing” operator in JavaScript?
...Boolean(null)); // false
alert(Boolean(undefined)); // false
alert(Boolean(0)); // false
alert(Boolean("")); // false
alert(Boolean("false")); // true -- gotcha! :)
This means:
var whatIWant = null || new ShinyObject(); // is a new shiny object
var whatIWant = undefined || "well defined"; // is "...
input type=file show only button
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answered Feb 11 '13 at 6:07
shibashiba
2,24311 gold badge1212 silver badges99 bronze badges
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HTML tag affecting line height, how to make it consistent?
...e font size further to make it fit:
sup { vertical-align: top; font-size: 0.6em; }
Another hack you could try is to use positioning to move it up a bit without affecting the line box:
sup { vertical-align: top; position: relative; top: -0.5em; }
Of course this runs the risk of crashing into th...
How to reuse an ostringstream?
...lear, then seek the appropriate sequence to the begin:
s.clear();
s.seekp(0); // for outputs: seek put ptr to start
s.seekg(0); // for inputs: seek get ptr to start
That will prevent some reallocations done by str by overwriting whatever is in the output buffer currently instead. Results are like...
How can I increment a char?
...
180
In Python 2.x, just use the ord and chr functions:
>>> ord('c')
99
>>> ord('c...
SVG fill color transparency / alpha?
...nal attribute; fill-opacity: This attribute takes a decimal number between 0.0 and 1.0, inclusive; where 0.0 is completely transparent.
For example:
<rect ... fill="#044B94" fill-opacity="0.4"/>
Additionally you have the following:
stroke-opacity attribute for the stroke
opacity for the ...
Is short-circuiting logical operators mandated? And evaluation order?
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edited Sep 23 '11 at 15:07
answered Mar 10 '09 at 0:37
Al...