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Read first N lines of a file in python
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There is no specific method to read number of lines exposed by file object.
I guess the easiest way would be following:
lines =[]
with open(file_name) as f:
lines.extend(f.readline() for i in xrange(N))
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How to use a switch case 'or' in PHP
...es of code depending on which value is set.
Each possible option is given by a case in the switch statement.
Example :
switch($bar)
{
case 4:
echo "This is not the number you're looking for.\n";
$foo = 92;
}
(ii). Delimiting code blocks
The major caveat of switch is that ea...
Blurry text after using CSS transform: scale(); in Chrome
...idden; sure worked in my case, in solving some weird blurry movement cause by opacity transition, that is. The weird movement is now gone, BUT it has made the texts in my div permanently blurred instead.
– ITWitch
Jan 18 '17 at 8:45
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gulp command not found - error after installing gulp
...e command in a new Node.js command prompt
I tried the NODE_PATH mentioned by @SteveLacy but the command prompt was still not able to detect gulp command
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PHP: How to remove specific element from an array?
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You can use array filter to remove the items by a specific condition on $v:
$arr = array_filter($arr, function($v){
return $v != 'some_value';
});
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Rails and PostgreSQL: Role postgres does not exist
...NAME
The createuser -s --username=postgres creates a superuser (-s flag) by connecting as postgres (--username=postgres flag).
I see that your question has been answered, but I want to add this answer in for people using OSX trying to install PostgreSQL 9.2.4.
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NPM doesn't install module dependencies
...age.json in the same directory as Gruntfile.js
Define the modules required by your grunt project
Execute npm install to load them locally
Now the required grunt command should work.
IMHO, it is sad that we cannot have grunt resolve modules loaded from a parent npm module (i.e. package.json in a pa...
Set a cookie to never expire
... years later in 2038. Hopefully we all make the jump to 64-bit everything by then this won't be a problem for another 292 billion years on Sunday, 4 December 292,277,026,596. Unless we reach a singularity before I die I don't think I'll have to worry about that one.
– shaunhu...
Is there a vr (vertical rule) in html?
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As pointed out by others, the concept of a vertical rule does not fit in with the original ideas behind the structure and presentation of HTML documents. However, these days (especially with the proliferation of web-apps) there are is a sma...
Django templates: verbose version of a choice
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We can extend the filter solution by Noah to be more universal in dealing with data and field types:
<table>
{% for item in query %}
<tr>
{% for field in fields %}
<td>{{item|human_readable:field}}</td>
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