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Checking if output of a command contains a certain string in a shell script
...ev/null
if [ $? == 0 ]; then
echo "matched"
fi
which is done idiomatically like so:
if ./somecommand | grep -q 'string'; then
echo "matched"
fi
and also:
./somecommand | grep -q 'string' && echo 'matched'
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Why is Cache-Control attribute sent in request header (client to server)?
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Cache-Control: no-cache is generally used in a request header (sent from web browser to server) to force validation of the resource in the intermediate proxies.
If the client doesn't send this request to the server, intermediate proxies will return a copy o...
scopes with lambda and arguments in Rails 4 style?
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Supporting documentation, section 14.1 specifically.
– Dennis
Feb 4 '14 at 18:40
3
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How to select only the first rows for each unique value of a column
...e 2nd technique or Ben Thul's technique. I answered what you asked specifically, with pointers on how to solve more generally.
– gbn
Jan 12 '11 at 4:53
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Difference between viewDidLoad and viewDidAppear
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viewDidLoad is called exactly once, when the view controller is first loaded into memory. This is where you want to instantiate any instance variables and build any views that live for the entire lifecycle of this view controller. However, t...
How to put an image in div with CSS?
I would like to have all my images in CSS (the only way I know how is to put them in as background images).
4 Answers
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Show a popup/message box from a Windows batch file
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I would make a very simple VBScript file and call it using CScript to parse the command line parameters.
Something like the following saved in MessageBox.vbs:
Set objArgs = WScript.Arguments
messageText = objArgs(0)
MsgBox messageText
Which you would call like:
cscr...
System.BadImageFormatException: Could not load file or assembly (from installutil.exe)
I am trying to install a Windows service using InstallUtil.exe and am getting the error message
15 Answers
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Java; String replace (using regular expressions)?
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str.replaceAll("\\^([0-9]+)", "<sup>$1</sup>");
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String to LocalDate
... class to use is DateTimeFormat, not DateTimeFormatter. In other words, call DateTimeFormat.ofPattern("yyyy-MM-dd").parseLocalDate(yourInput);
– Dan Haywood
Jul 12 '19 at 12:13
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