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Validate phone number with JavaScript
... at the beginning and $ the end it can find phone numbers in the middle of strings as well
– hobberwickey
Mar 8 '19 at 17:14
2
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Does Java have buffer overflows?
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Since Java Strings are based on char arrays and Java automatically checks array bounds, buffer overflows are only possible in unusual scenarios:
If you call native code via JNI
In the JVM itself (usually written in C++)
The interprete...
Fastest way to remove first char in a String
Say we have the following string
4 Answers
4
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Python subprocess/Popen with a modified environment
.... For the second case your main objection still fails: the point about non-string keys are not applicable in this case as the keys are basically required to be strings in the environment anyway.
– skyking
May 17 '16 at 5:35
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What is the equivalent of “none” in django templates?
...all are available within template tags and filters. None, False, the empty string ('', "", """""") and empty lists/tuples all evaluate to False when evaluated by if, so you can easily do
{% if profile.user.first_name == None %}
{% if not profile.user.first_name %}
A hint: @fabiocerqueira is right...
Find difference between timestamps in seconds in PostgreSQL
... It will Subtract arguments, producing a "symbolic" result that uses years and months. It wont give the difference in seconds.
– Igor Romanchenko
Dec 24 '12 at 11:55
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Pass all variables from one shell script to another?
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Also it is important to note that "" are necessary if we pass multiword strings.
Taking one more example
master.sh
#!/bin/bash
echo in master.sh
var1="hello world"
sh slave1.sh $var1
sh slave2.sh "$var1"
echo back to master
slave1.sh
#!/bin/bash
echo in slave1.sh
echo value :$1
slave2.sh
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How to implement the Java comparable interface?
...this:
public class Animal implements Comparable<Animal>{
public String name;
public int year_discovered;
public String population;
public Animal(String name, int year_discovered, String population){
this.name = name;
this.year_discovered = year_discovered;
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Java regular expression OR operator
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You can just use the pipe on its own:
"string1|string2"
for example:
String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));
Output:
blah, blah, string3
The main reason to use parentheses is to limit the scope o...
DataContractSerializer doesn't call my constructor?
...sible : when deserializing an object, the DataContractSerializer doesn't call the constructor !
4 Answers
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