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some fixes about JavaScript #1

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some fixes about JavaScript #1

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12 changes: 6 additions & 6 deletions public_html/contents/language.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@
定数_VB <red>Const</red> C As Integer = 10
定数_Java <red>static final</red> int C = 10;
定数_PHP <red>define</red>('C', 10);
定数_JS <red>const</red> C = 10;
定数_JS <red>const</red> C = 10; // ES2015
定数_Ruby <red>C</red> = 10
定数_Python -
定数_Perl <red>use constant</red> C => 10;
Expand Down Expand Up @@ -387,7 +387,7 @@ Perl_2進 0b11111111
変数埋め込み_VB s = "Hello " & world
変数埋め込み_Java String s = "Hello " + world;
変数埋め込み_PHP $s = "Hello " + $world;
変数埋め込み_JS var s = "Hello $world";
変数埋め込み_JS var s = `Hello ${world}`; // ES2015
変数埋め込み_Ruby s = "Hello #{world}"
変数埋め込み_Python s = "Hello %s" % world
変数埋め込み_Perl my $s = "Hello ${world}";
Expand Down Expand Up @@ -616,8 +616,8 @@ Forループ_VB For i = 0 To 9
Forループ_PHP for($i = 0; $i < 10; $i++){
print "$i\n";
}
Forループ_JS for($i = 0; $i < 10; $i++){
console.log($i);
Forループ_JS for(var i = 0; i < 10; i++){
console.log(i);
}
Forループ_Ruby for i in 0..9 do
puts "#{i}"
Expand Down Expand Up @@ -1383,14 +1383,14 @@ PHP_無効値判定 if(!empty($v)){ … }
JS_True定数 true
JS_False定数 false
JS_True判定 False判定以外 # [], '0' 等はTrue扱い
JS_False判定 false, undefined, 0, ''
JS_False判定 false, undefined, null, NaN, 0, ''
JS_無効値定数 undefined
null
NaN
JS_無効値判定 if(v){ … }
if(v !== null){ … }
if(typeof v !== 'undefined'){ … ]
if(v !== NaN){ … }
if(!Number.isNaN(v)){ … }


# http://qiita.com/sgtn/items/0cb16ef16d938cf98094
Expand Down