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What is the source code of the “this” module doing?
...r) chars.
print "".join([d.get(c, c) for c in s])
Prints the translated string.
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What is the purpose of “&&” in a shell command?
...
&& strings commands together. Successive commands only execute if preceding ones succeed.
Similarly, || will allow the successive command to execute if the preceding fails.
See Bash Shell Programming.
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What is the difference between a HashMap and a TreeMap? [duplicate]
...rted key store one another difference is with TreeMap, developer can give (String.CASE_INSENSITIVE_ORDER) with String keys, so then the comparator ignores case of key while performing comparison of keys on map access. This is not possible to give such option with HashMap - it is always case sensitiv...
How to apply shell command to each line of a command output?
...ot special (every character is taken literally). Disables the end of file string, which is treated like
any other argument. Useful when input items might contain white space, quote marks, or backslashes. The
GNU find -print0 option produces input suitable for this mode.
l...
Which HTML5 tag should I use to mark up an author’s name?
...blished
site structure under which the article is organized (category/tag: string/arrays)
etc.
An opinionated example:
<article>
<header>
<h1>Article Title</h1>
<p class="subtitle">Subtitle</p>
<dl class="dateline">
<dt>Autho...
What is the difference between SIGSTOP and SIGTSTP?
Just wondering about the difference between SIGSTOP and SIGTSTP signals.
3 Answers
3...
Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
...veRecord::Migration[5.2]
def change
create_table :users do |t|
t.string :name, null: false # Notice here, NOT NULL definition
t.string :email, null: false
t.string :password, null: false
t.integer :created_by
t.integer :updated_by
t.datetime :created_at
t.date...
How to parameterize @Scheduled(fixedDelay) with Spring 3.0 expression language?
...ject" method="readLog"
fixed-rate="#{YourConfigurationBean.stringValue}"/>
</task:scheduled-tasks>
... or if the cast from String to Long didn't work, something like this would:
<task:scheduled-tasks scheduler="myScheduler">
<task:scheduled ref="someObject" m...
How to 'grep' a continuous stream?
...and how large the buffers are on your OS. If the grep only matches a short string every few hours, it will be days before the first flush.
– tripleee
Aug 23 '11 at 13:53
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Switch statement fallthrough in C#?
...bugs in C and Java.
The workaround is to use goto, e.g.
switch (number.ToString().Length)
{
case 3:
ans += string.Format("{0} hundred and ", numbers[number / 100]);
goto case 2;
case 2:
// Etc
}
The general design of switch/case is a little bit unfortunate in my view....