大约有 49,000 项符合查询结果（耗时：0.1154秒） [XML]
What's the difference between using “let” and “var”?
...let keyword was introduced to the language was function scope is confusing and was one of the main sources of bugs in JavaScript.
Take a look at this example from another stackoverflow question:
var funcs = [];
// let's create 3 functions
for (var i = 0; i < 3; i++) {
// and store them in fun...
How to get the part of a file after the first line that matches a regular expression?
...g the TERMINATE regular expression (like grep) to the end of the file ($), and p is the print command which prints the current line.
This will print from the line that follows the line matching TERMINATE till the end of the file:
(from AFTER the matching line to EOF, NOT including the matching line...
Unix command-line JSON parser? [closed]
...
You can use this command-line parser (which you could put into a bash alias if you like), using modules built into the Perl core:
perl -MData::Dumper -MJSON::PP=from_json -ne'print Dumper(from_json($_))'
...
How to reset radiobuttons in jQuery so that none is checked
...e note 2 below).
Note 1: it is important that the second argument be false and not "false" since "false" is not a falsy value. i.e.
if ("false") {
alert("Truthy value. You will see an alert");
}
Note 2: As of jQuery 1.6.0, there are now two similar methods, .attr and .prop that do two related b...
Bash tool to get nth line from a file
...
head and pipe with tail will be slow for a huge file. I would suggest sed like this:
sed 'NUMq;d' file
Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file.
Ex...
Django, creating a custom 500/404 error page
...in views.py add your own custom implementation of the following two views, and just set up the templates 404.html and 500.html with what you want to display.
With this solution, no custom code needs to be added to urls.py
Here's the code:
from django.shortcuts import render_to_response
from djang...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
... trade off memory for speed (assuming your L1 Data Cache is large enough), and reverse 16 bits at a time with a 64K-entry lookup table.
Others
Simple
unsigned int v; // input bits to be reversed
unsigned int r = v & 1; // r will be reversed bits of v; first get LSB of v
int s = sizeof(v...
What is the email subject length limit?
...e RFC 2822, section 2.1.1 to start.
There are two limits that this
standard places on the number of
characters in a line. Each line of
characters MUST be no more than 998
characters, and SHOULD be no more than
78 characters, excluding the CRLF.
As the RFC states later, you can work a...
How to write to file in Ruby?
I need to read the data out of database and then save it in a text file.
7 Answers
7
...
Is there a software-engineering methodology for functional programming? [closed]
...g as it is taught today is entirely focused on object-oriented programming and the 'natural' object-oriented view of the world. There is a detailed methodology that describes how to transform a domain model into a class model with several steps and a lot of (UML) artifacts like use-case-diagrams or ...