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Ruby on Rails: How do I add placeholder text to a f.text_field?
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For those using Rails(4.2) Internationalization (I18n):
Set the placeholder attribute to true:
f.text_field :attr, placeholder: true
and in your local file (ie. en.yml):
en:
helpers:
placeholder:
model_name:
attr: "some placeholder text"
...
mongodb/mongoose findMany - find all documents with IDs listed in array
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
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else {
createEditor();
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Adding new column to existing DataFrame in Python pandas
...m.randn(sLength), index=df1.index)
Edit 2015
Some reported getting the SettingWithCopyWarning with this code.
However, the code still runs perfectly with the current pandas version 0.16.1.
>>> sLength = len(df1['a'])
>>> df1
a b c d
6 -0.26922...
Explaining Python's '__enter__' and '__exit__'
...s it easy to build code which needs some 'cleandown' code executed (think of it as a try-finally block). Some more explanation here.
A useful example could be a database connection object (which then automagically closes the connection once the corresponding 'with'-statement goes out of scope):
cl...
How to grant permission to users for a directory using command line in Windows?
...ing from the *nix world and being used to 'chown/chmod' to give access and set permissions via the CLI, this thread has been very helpful.
– bgarlock
Oct 27 '15 at 14:40
6
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How to initialize a struct in accordance with C programming language standards
...n use a designated initializer to initialize a structure:
MY_TYPE a = { .flag = true, .value = 123, .stuff = 0.456 };
Edit: Other members are initialized as zero: "Omitted field members are implicitly initialized the same as objects that have static storage duration." (https://gcc.gnu.org/online...
How to get the input from the Tkinter Text Widget?
... zero (ie: the very first character). END is an imported constant which is set to the string "end". The END part means to read until the end of the text box is reached. The only issue with this is that it actually adds a newline to our input. So, in order to fix it we should change END to end-1c(Tha...
How to search for occurrences of more than one space between words in a line
... the digits, commas and new lines but select the middle space such as data set of
20171106,16632 ESCG0000018SB
20171107,280 ESCG0000018SB
20171106,70476 ESCG0000018SB
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How to draw a dotted line with css?
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For example:
hr {
border:none;
border-top:1px dotted #f00;
color:#fff;
background-color:#fff;
height:1px;
width:50%;
}
See also Styling <hr> with CSS.
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How to remove item from list in C#?
I have a list stored in resultlist as follows:
8 Answers
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