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Check image width and height before upload with Javascript
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The file is just a file, you need to create an image like so:
var _URL = window.URL || window.webkitURL;
$("#file").change(function (e) {
var file, img;
if ((file = this.files[0])) {
img = new Image();
var objectUrl = _URL.createObjectURL(file);
img.onload = ...
Why is argc not a constant?
...ting C code was an early goal of C++.
Some UNIX APIs, such as getopt, actually do manipulate argv[], so it can't be made const for that reason also.
(Aside: Interestingly, although getopt's prototype suggests it won't modify argv[] but may modify the strings pointed to, the Linux man page indica...
Is there an alternative sleep function in C to milliseconds?
...s defined usleep(), so this is available on Linux:
int usleep(useconds_t usec);
DESCRIPTION
The usleep() function suspends execution of the calling thread for
(at least) usec microseconds. The sleep may be lengthened slightly by
any system activity or by the tim...
How to write string literals in python without having to escape them?
...roduction.html#strings
and here:
http://docs.python.org/reference/lexical_analysis.html#literals
The simplest example would be using the 'r' prefix:
ss = r'Hello\nWorld'
print(ss)
Hello\nWorld
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Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?
...dy via response.getOutputStream() or response.getWriter() . Should one call .close() on this OutputStream after it has been written to?
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Call PowerShell script PS1 from another PS1 script inside Powershell ISE
...$ChromeInstallArgs= "/i", "$PSScriptRoot\googlechromestandaloneenterprise64_v.57.0.2987.110.msi", "/q", "/norestart", "/L*v `"C:\Windows\Logs\Google_Chrome_57.0.2987.110_Install_x64.log`""
Start-Process -FilePath msiexec -ArgumentList $ChromeInstallArgs -Wait -ErrorAction Stop
$Result= [Syst...
How to unzip files programmatically in Android?
I need a small code snippet which unzips a few files from a given .zip file and gives the separate files according to the format they were in the zipped file. Please post your knowledge and help me out.
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Interfaces with static fields in java for sharing 'constants'
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It's generally considered bad practice. The problem is that the constants are part of the public "interface" (for want of a better word) of the implementing class. This means that the implementing class is publishing all of these val...
config.assets.compile=true in Rails production, why not?
The default Rails app installed by rails new has config.assets.compile = false in production.
7 Answers
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How to find and return a duplicate value in array
...ou're writing this code for some huge scaling data (and if so, you can actually just use C or Python), the provided answer is far more elegant/readable, and isnt' going to run that much slower compared to a linear time solution. furthermore, in theory, the linear time solution requires linear space,...