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How can I see the size of files and directories in linux? [closed]
How can I see the size of files and directories in Linux? If use df -m , then it shows the size of all the directory at the top level, but, for the directories and files inside the directory, how do I check the size?
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Node.js - Find home directory in platform agnostic way
...indows a user's home directory might be C:\Users[USERNAME] or C:\Documents and Settings[USERNAME] depending on which version of Windows is being used. On Unix this isn't an issue.
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Using the Swift if let with logical AND operator &&
We know that we can use an if let statement as a shorthand to check for an optional nil then unwrap.
6 Answers
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Can you use a trailing comma in a JSON object?
...ed to worry about all browsers.
In general I try turn the problem around, and add the comma before the actual value, so you end up with code that looks like this:
s.append("[");
for (i = 0; i < 5; ++i) {
if (i) s.append(","); // add the comma only if this isn't the first entry
s.appendF("\"...
What is the purpose of setting a key in data.table?
I am using data.table and there are many functions which require me to set a key (e.g. X[Y] ). As such, I wish to understand what a key does in order to properly set keys in my data tables.
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Python Infinity - Any caveats?
So Python has positive and negative infinity:
5 Answers
5
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How can I suppress all output from a command using Bash?
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The following sends standard output to the null device (bit bucket).
scriptname >/dev/null
And if you also want error messages to be sent there, use one of (the first may not work in all shells):
scriptname &>/dev/null
scriptname >...
How do I request a file but not save it with Wget? [closed]
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Use q flag for quiet mode, and tell wget to output to stdout with O- (uppercase o) and redirect to /dev/null to discard the output:
wget -qO- $url &> /dev/null
> redirects application output (to a file). if > is preceded by ampersand, sh...
Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
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Instances of Buffer are also instances of Uint8Array in node.js 4.x and higher. Thus, the most efficient solution is to access the buf.buffer property directly, as per https://stackoverflow.com/a/31394257/1375574. The Buffer constructor also takes an ArrayBufferView argument if you need to ...
What is content-type and datatype in an AJAX request?
What is content-type and datatype in a POST request? Suppose I have this:
3 Answers
3
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